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[37.48.36.100]) by mx.google.com with ESMTPSA id t9sm12442274wjf.41.2014.09.22.07.16.11 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 22 Sep 2014 07:16:13 -0700 (PDT) From: Tomeu Vizoso To: Mike Turquette Subject: [PATCH v12 04/10] clk: use struct clk only for external API Date: Mon, 22 Sep 2014 16:15:47 +0200 Message-Id: <1411395353-3189-1-git-send-email-tomeu.vizoso@collabora.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1411395124-2476-1-git-send-email-tomeu.vizoso@collabora.com> References: <1411395124-2476-1-git-send-email-tomeu.vizoso@collabora.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140922_071637_675977_F8818532 X-CRM114-Status: GOOD ( 23.49 ) X-Spam-Score: -0.7 (/) Cc: Tomeu Vizoso , Stephen Warren , Peter De Schrijver , linux-kernel@vger.kernel.org, tomasz.figa@gmail.com, rabin@rab.in, Thierry Reding , Javier Martinez Canillas , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_NONE,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In order to provide per-user accounting, this separates the struct clk used in the common clock framework into two structures 'struct clk_core' and 'struct clk'. struct clk_core will be used for internal manipulation and struct clk will be used in the clock API implementation. In this patch, struct clk is simply renamed to struct clk_core and a new struct clk is implemented which simply wraps it. In the next patch, the new struct clk will be used to implement per-user clock enable accounting. Based on previous work by Rabin Vincent . NOTE: with this patch, clk_get_parent() behaves like clk_get(), i.e. it needs to be matched with a clk_put(). Otherwise, memory will leak. Signed-off-by: Tomeu Vizoso Tested-by: Heiko Stuebner --- v12: * Export of_clk_provider_get() v9: * Removed superfluous variable v7: * convert clk_is_enabled to clk_core * add clk_provider_notifier_[un]register v4: * export clk_to_clk_core so mach-msm can use it for clk_reset * add clk_provider_round_rate, for mach-imx * fix build with !CONFIG_COMMON_CLK * keep handling NULL struct clk gracefully as before v3: * Allocate and release the per-user struct clk * Have clk_core_to_clk return any error it's passed, so calls to it can be chained * Add provider API for enable and disable * Remove clk_free_clk for now * Have clk_to_clk_core be an inline function to benefit of type-checking * Have devres wrap the clk struct instead of clk_core * Rename clk_core_to_clk to __clk_create_clk to make more clear that it allocates --- arch/arm/mach-msm/clock.c | 2 +- drivers/clk/clk-devres.c | 31 ++ drivers/clk/clk.c | 669 ++++++++++++++++++++++++++----------------- drivers/clk/clk.h | 6 + drivers/clk/clkdev.c | 124 ++++++-- include/linux/clk-private.h | 38 +-- include/linux/clk-provider.h | 164 ++++++----- include/linux/clk.h | 32 ++- include/linux/clkdev.h | 24 +- 9 files changed, 702 insertions(+), 388 deletions(-) diff --git a/arch/arm/mach-msm/clock.c b/arch/arm/mach-msm/clock.c index 35ea02b5..1de0b5a 100644 --- a/arch/arm/mach-msm/clock.c +++ b/arch/arm/mach-msm/clock.c @@ -21,7 +21,7 @@ int clk_reset(struct clk *clk, enum clk_reset_action action) { - struct clk_hw *hw = __clk_get_hw(clk); + struct clk_hw *hw = __clk_get_hw(clk_to_clk_core(clk)); struct msm_clk *m = to_msm_clk(hw); return m->reset(hw, action); } diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c index 8f57154..79cd4d3 100644 --- a/drivers/clk/clk-devres.c +++ b/drivers/clk/clk-devres.c @@ -5,10 +5,14 @@ */ #include +#include +#include #include #include #include +#include "clk.h" + static void devm_clk_release(struct device *dev, void *res) { clk_put(*(struct clk **)res); @@ -34,6 +38,33 @@ struct clk *devm_clk_get(struct device *dev, const char *id) } EXPORT_SYMBOL(devm_clk_get); +#if defined(CONFIG_COMMON_CLK) +static void devm_clk_core_release(struct device *dev, void *res) +{ + __clk_put(*(struct clk_core **)res); +} + +struct clk_core *devm_clk_provider_get(struct device *dev, const char *id) +{ + struct clk_core **ptr, *clk; + + ptr = devres_alloc(devm_clk_core_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return ERR_PTR(-ENOMEM); + + clk = clk_provider_get(dev, id); + if (!IS_ERR(clk)) { + *ptr = clk; + devres_add(dev, ptr); + } else { + devres_free(ptr); + } + + return clk; +} +EXPORT_SYMBOL(devm_clk_provider_get); +#endif + static int devm_clk_match(struct device *dev, void *res, void *data) { struct clk **c = res; diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 5db9710..4fe67b8 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -37,6 +37,8 @@ static HLIST_HEAD(clk_root_list); static HLIST_HEAD(clk_orphan_list); static LIST_HEAD(clk_notifier_list); +static long __clk_get_accuracy_internal(struct clk_core *clk); + /*** locking ***/ static void clk_prepare_lock(void) { @@ -112,7 +114,7 @@ static struct hlist_head *orphan_list[] = { NULL, }; -static void clk_summary_show_one(struct seq_file *s, struct clk *c, int level) +static void clk_summary_show_one(struct seq_file *s, struct clk_core *c, int level) { if (!c) return; @@ -120,14 +122,14 @@ static void clk_summary_show_one(struct seq_file *s, struct clk *c, int level) seq_printf(s, "%*s%-*s %11d %12d %11lu %10lu\n", level * 3 + 1, "", 30 - level * 3, c->name, - c->enable_count, c->prepare_count, clk_get_rate(c), - clk_get_accuracy(c)); + c->enable_count, c->prepare_count, clk_provider_get_rate(c), + __clk_get_accuracy_internal(c)); } -static void clk_summary_show_subtree(struct seq_file *s, struct clk *c, +static void clk_summary_show_subtree(struct seq_file *s, struct clk_core *c, int level) { - struct clk *child; + struct clk_core *child; if (!c) return; @@ -140,7 +142,7 @@ static void clk_summary_show_subtree(struct seq_file *s, struct clk *c, static int clk_summary_show(struct seq_file *s, void *data) { - struct clk *c; + struct clk_core *c; struct hlist_head **lists = (struct hlist_head **)s->private; seq_puts(s, " clock enable_cnt prepare_cnt rate accuracy\n"); @@ -170,7 +172,7 @@ static const struct file_operations clk_summary_fops = { .release = single_release, }; -static void clk_dump_one(struct seq_file *s, struct clk *c, int level) +static void clk_dump_one(struct seq_file *s, struct clk_core *c, int level) { if (!c) return; @@ -178,13 +180,13 @@ static void clk_dump_one(struct seq_file *s, struct clk *c, int level) seq_printf(s, "\"%s\": { ", c->name); seq_printf(s, "\"enable_count\": %d,", c->enable_count); seq_printf(s, "\"prepare_count\": %d,", c->prepare_count); - seq_printf(s, "\"rate\": %lu", clk_get_rate(c)); - seq_printf(s, "\"accuracy\": %lu", clk_get_accuracy(c)); + seq_printf(s, "\"rate\": %lu", clk_provider_get_rate(c)); + seq_printf(s, "\"accuracy\": %lu", __clk_get_accuracy_internal(c)); } -static void clk_dump_subtree(struct seq_file *s, struct clk *c, int level) +static void clk_dump_subtree(struct seq_file *s, struct clk_core *c, int level) { - struct clk *child; + struct clk_core *child; if (!c) return; @@ -201,7 +203,7 @@ static void clk_dump_subtree(struct seq_file *s, struct clk *c, int level) static int clk_dump(struct seq_file *s, void *data) { - struct clk *c; + struct clk_core *c; bool first_node = true; struct hlist_head **lists = (struct hlist_head **)s->private; @@ -238,7 +240,7 @@ static const struct file_operations clk_dump_fops = { }; /* caller must hold prepare_lock */ -static int clk_debug_create_one(struct clk *clk, struct dentry *pdentry) +static int clk_debug_create_one(struct clk_core *clk, struct dentry *pdentry) { struct dentry *d; int ret = -ENOMEM; @@ -301,9 +303,9 @@ out: } /* caller must hold prepare_lock */ -static int clk_debug_create_subtree(struct clk *clk, struct dentry *pdentry) +static int clk_debug_create_subtree(struct clk_core *clk, struct dentry *pdentry) { - struct clk *child; + struct clk_core *child; int ret = -EINVAL;; if (!clk || !pdentry) @@ -333,7 +335,7 @@ out: * Caller must hold prepare_lock. Only clk_init calls this function (so * far) so this is taken care. */ -static int clk_debug_register(struct clk *clk) +static int clk_debug_register(struct clk_core *clk) { int ret = 0; @@ -356,12 +358,12 @@ out: * * Caller must hold prepare_lock. */ -static void clk_debug_unregister(struct clk *clk) +static void clk_debug_unregister(struct clk_core *clk) { debugfs_remove_recursive(clk->dentry); } -struct dentry *clk_debugfs_add_file(struct clk *clk, char *name, umode_t mode, +struct dentry *clk_debugfs_add_file(struct clk_core *clk, char *name, umode_t mode, void *data, const struct file_operations *fops) { struct dentry *d = NULL; @@ -387,7 +389,7 @@ EXPORT_SYMBOL_GPL(clk_debugfs_add_file); */ static int __init clk_debug_init(void) { - struct clk *clk; + struct clk_core *clk; struct dentry *d; rootdir = debugfs_create_dir("clk", NULL); @@ -431,19 +433,19 @@ static int __init clk_debug_init(void) } late_initcall(clk_debug_init); #else -static inline int clk_debug_register(struct clk *clk) { return 0; } -static inline void clk_debug_reparent(struct clk *clk, struct clk *new_parent) +static inline int clk_debug_register(struct clk_core *clk) { return 0; } +static inline void clk_debug_reparent(struct clk_core *clk, struct clk_core *new_parent) { } -static inline void clk_debug_unregister(struct clk *clk) +static inline void clk_debug_unregister(struct clk_core *clk) { } #endif /* caller must hold prepare_lock */ -static void clk_unprepare_unused_subtree(struct clk *clk) +static void clk_unprepare_unused_subtree(struct clk_core *clk) { - struct clk *child; + struct clk_core *child; if (!clk) return; @@ -466,9 +468,9 @@ static void clk_unprepare_unused_subtree(struct clk *clk) } /* caller must hold prepare_lock */ -static void clk_disable_unused_subtree(struct clk *clk) +static void clk_disable_unused_subtree(struct clk_core *clk) { - struct clk *child; + struct clk_core *child; unsigned long flags; if (!clk) @@ -514,7 +516,7 @@ __setup("clk_ignore_unused", clk_ignore_unused_setup); static int clk_disable_unused(void) { - struct clk *clk; + struct clk_core *clk; if (clk_ignore_unused) { pr_warn("clk: Not disabling unused clocks\n"); @@ -541,33 +543,50 @@ static int clk_disable_unused(void) } late_initcall_sync(clk_disable_unused); +struct clk *__clk_create_clk(struct clk_core *clk_core) +{ + struct clk *clk; + + /* This is to allow this function to be chained to others */ + if (!clk_core || IS_ERR(clk_core)) + return (struct clk *) clk_core; + + clk = kzalloc(sizeof(*clk), GFP_KERNEL); + if (!clk) + return ERR_PTR(-ENOMEM); + + clk->core = clk_core; + + return clk; +} + /*** helper functions ***/ -const char *__clk_get_name(struct clk *clk) +const char *__clk_get_name(struct clk_core *clk) { return !clk ? NULL : clk->name; } EXPORT_SYMBOL_GPL(__clk_get_name); -struct clk_hw *__clk_get_hw(struct clk *clk) +struct clk_hw *__clk_get_hw(struct clk_core *clk) { return !clk ? NULL : clk->hw; } EXPORT_SYMBOL_GPL(__clk_get_hw); -u8 __clk_get_num_parents(struct clk *clk) +u8 __clk_get_num_parents(struct clk_core *clk) { return !clk ? 0 : clk->num_parents; } EXPORT_SYMBOL_GPL(__clk_get_num_parents); -struct clk *__clk_get_parent(struct clk *clk) +struct clk_core *__clk_get_parent(struct clk_core *clk) { return !clk ? NULL : clk->parent; } EXPORT_SYMBOL_GPL(__clk_get_parent); -struct clk *clk_get_parent_by_index(struct clk *clk, u8 index) +struct clk_core *clk_get_parent_by_index(struct clk_core *clk, u8 index) { if (!clk || index >= clk->num_parents) return NULL; @@ -581,17 +600,17 @@ struct clk *clk_get_parent_by_index(struct clk *clk, u8 index) } EXPORT_SYMBOL_GPL(clk_get_parent_by_index); -unsigned int __clk_get_enable_count(struct clk *clk) +unsigned int __clk_get_enable_count(struct clk_core *clk) { return !clk ? 0 : clk->enable_count; } -unsigned int __clk_get_prepare_count(struct clk *clk) +unsigned int __clk_get_prepare_count(struct clk_core *clk) { return !clk ? 0 : clk->prepare_count; } -unsigned long __clk_get_rate(struct clk *clk) +unsigned long __clk_get_rate(struct clk_core *clk) { unsigned long ret; @@ -613,7 +632,7 @@ out: } EXPORT_SYMBOL_GPL(__clk_get_rate); -unsigned long __clk_get_accuracy(struct clk *clk) +unsigned long __clk_get_accuracy(struct clk_core *clk) { if (!clk) return 0; @@ -621,13 +640,13 @@ unsigned long __clk_get_accuracy(struct clk *clk) return clk->accuracy; } -unsigned long __clk_get_flags(struct clk *clk) +unsigned long __clk_get_flags(struct clk_core *clk) { return !clk ? 0 : clk->flags; } EXPORT_SYMBOL_GPL(__clk_get_flags); -bool __clk_is_prepared(struct clk *clk) +bool __clk_is_prepared(struct clk_core *clk) { int ret; @@ -648,7 +667,7 @@ out: return !!ret; } -bool __clk_is_enabled(struct clk *clk) +bool __clk_is_enabled(struct clk_core *clk) { int ret; @@ -670,10 +689,10 @@ out: } EXPORT_SYMBOL_GPL(__clk_is_enabled); -static struct clk *__clk_lookup_subtree(const char *name, struct clk *clk) +static struct clk_core *__clk_lookup_subtree(const char *name, struct clk_core *clk) { - struct clk *child; - struct clk *ret; + struct clk_core *child; + struct clk_core *ret; if (!strcmp(clk->name, name)) return clk; @@ -687,10 +706,10 @@ static struct clk *__clk_lookup_subtree(const char *name, struct clk *clk) return NULL; } -struct clk *__clk_lookup(const char *name) +struct clk_core *__clk_lookup(const char *name) { - struct clk *root_clk; - struct clk *ret; + struct clk_core *root_clk; + struct clk_core *ret; if (!name) return NULL; @@ -719,9 +738,9 @@ struct clk *__clk_lookup(const char *name) */ long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate, unsigned long *best_parent_rate, - struct clk **best_parent_p) + struct clk_core **best_parent_p) { - struct clk *clk = hw->clk, *parent, *best_parent = NULL; + struct clk_core *clk = hw->clk, *parent, *best_parent = NULL; int i, num_parents; unsigned long parent_rate, best = 0; @@ -764,7 +783,7 @@ EXPORT_SYMBOL_GPL(__clk_mux_determine_rate); /*** clk api ***/ -void __clk_unprepare(struct clk *clk) +void __clk_unprepare(struct clk_core *clk) { if (!clk) return; @@ -783,9 +802,20 @@ void __clk_unprepare(struct clk *clk) __clk_unprepare(clk->parent); } +void clk_provider_unprepare(struct clk_core *clk) +{ + if (IS_ERR_OR_NULL(clk)) + return; + + clk_prepare_lock(); + __clk_unprepare(clk); + clk_prepare_unlock(); +} +EXPORT_SYMBOL_GPL(clk_provider_unprepare); + /** * clk_unprepare - undo preparation of a clock source - * @clk: the clk being unprepared + * @clk_user: the clk being unprepared * * clk_unprepare may sleep, which differentiates it from clk_disable. In a * simple case, clk_unprepare can be used instead of clk_disable to gate a clk @@ -794,18 +824,16 @@ void __clk_unprepare(struct clk *clk) * part. It is this reason that clk_unprepare and clk_disable are not mutually * exclusive. In fact clk_disable must be called before clk_unprepare. */ -void clk_unprepare(struct clk *clk) +void clk_unprepare(struct clk *clk_user) { - if (IS_ERR_OR_NULL(clk)) + if (IS_ERR_OR_NULL(clk_user)) return; - clk_prepare_lock(); - __clk_unprepare(clk); - clk_prepare_unlock(); + clk_provider_unprepare(clk_to_clk_core(clk_user)); } EXPORT_SYMBOL_GPL(clk_unprepare); -int __clk_prepare(struct clk *clk) +int __clk_prepare(struct clk_core *clk) { int ret = 0; @@ -831,9 +859,21 @@ int __clk_prepare(struct clk *clk) return 0; } +int clk_provider_prepare(struct clk_core *clk) +{ + int ret; + + clk_prepare_lock(); + ret = __clk_prepare(clk); + clk_prepare_unlock(); + + return ret; +} +EXPORT_SYMBOL_GPL(clk_provider_prepare); + /** * clk_prepare - prepare a clock source - * @clk: the clk being prepared + * @clk_user: the clk being prepared * * clk_prepare may sleep, which differentiates it from clk_enable. In a simple * case, clk_prepare can be used instead of clk_enable to ungate a clk if the @@ -843,19 +883,16 @@ int __clk_prepare(struct clk *clk) * exclusive. In fact clk_prepare must be called before clk_enable. * Returns 0 on success, -EERROR otherwise. */ -int clk_prepare(struct clk *clk) +int clk_prepare(struct clk *clk_user) { - int ret; - - clk_prepare_lock(); - ret = __clk_prepare(clk); - clk_prepare_unlock(); + if (!clk_user) + return 0; - return ret; + return clk_provider_prepare(clk_to_clk_core(clk_user)); } EXPORT_SYMBOL_GPL(clk_prepare); -static void __clk_disable(struct clk *clk) +static void __clk_disable(struct clk_core *clk) { if (!clk) return; @@ -872,9 +909,22 @@ static void __clk_disable(struct clk *clk) __clk_disable(clk->parent); } +void clk_provider_disable(struct clk_core *clk) +{ + unsigned long flags; + + if (IS_ERR_OR_NULL(clk)) + return; + + flags = clk_enable_lock(); + __clk_disable(clk); + clk_enable_unlock(flags); +} +EXPORT_SYMBOL_GPL(clk_provider_disable); + /** * clk_disable - gate a clock - * @clk: the clk being gated + * @clk_user: the clk being gated * * clk_disable must not sleep, which differentiates it from clk_unprepare. In * a simple case, clk_disable can be used instead of clk_unprepare to gate a @@ -884,20 +934,16 @@ static void __clk_disable(struct clk *clk) * this reason that clk_unprepare and clk_disable are not mutually exclusive. * In fact clk_disable must be called before clk_unprepare. */ -void clk_disable(struct clk *clk) +void clk_disable(struct clk *clk_user) { - unsigned long flags; - - if (IS_ERR_OR_NULL(clk)) + if (IS_ERR_OR_NULL(clk_user)) return; - flags = clk_enable_lock(); - __clk_disable(clk); - clk_enable_unlock(flags); + clk_provider_disable(clk_to_clk_core(clk_user)); } EXPORT_SYMBOL_GPL(clk_disable); -static int __clk_enable(struct clk *clk) +static int __clk_enable(struct clk_core *clk) { int ret = 0; @@ -926,9 +972,22 @@ static int __clk_enable(struct clk *clk) return 0; } +int clk_provider_enable(struct clk_core *clk) +{ + unsigned long flags; + int ret; + + flags = clk_enable_lock(); + ret = __clk_enable(clk); + clk_enable_unlock(flags); + + return ret; +} +EXPORT_SYMBOL_GPL(clk_provider_enable); + /** * clk_enable - ungate a clock - * @clk: the clk being ungated + * @clk_user: the clk being ungated * * clk_enable must not sleep, which differentiates it from clk_prepare. In a * simple case, clk_enable can be used instead of clk_prepare to ungate a clk @@ -939,16 +998,12 @@ static int __clk_enable(struct clk *clk) * must be called before clk_enable. Returns 0 on success, -EERROR * otherwise. */ -int clk_enable(struct clk *clk) +int clk_enable(struct clk *clk_user) { - unsigned long flags; - int ret; - - flags = clk_enable_lock(); - ret = __clk_enable(clk); - clk_enable_unlock(flags); + if (!clk_user) + return 0; - return ret; + return clk_provider_enable(clk_to_clk_core(clk_user)); } EXPORT_SYMBOL_GPL(clk_enable); @@ -959,10 +1014,10 @@ EXPORT_SYMBOL_GPL(clk_enable); * * Caller must hold prepare_lock. Useful for clk_ops such as .set_rate */ -unsigned long __clk_round_rate(struct clk *clk, unsigned long rate) +unsigned long __clk_round_rate(struct clk_core *clk, unsigned long rate) { unsigned long parent_rate = 0; - struct clk *parent; + struct clk_core *parent; if (!clk) return 0; @@ -983,42 +1038,51 @@ unsigned long __clk_round_rate(struct clk *clk, unsigned long rate) } EXPORT_SYMBOL_GPL(__clk_round_rate); +long clk_provider_round_rate(struct clk_core *clk, unsigned long rate) +{ + unsigned long ret; + + clk_prepare_lock(); + ret = __clk_round_rate(clk, rate); + clk_prepare_unlock(); + + return ret; +} +EXPORT_SYMBOL_GPL(clk_provider_round_rate); + /** * clk_round_rate - round the given rate for a clk - * @clk: the clk for which we are rounding a rate + * @clk_user: the clk for which we are rounding a rate * @rate: the rate which is to be rounded * * Takes in a rate as input and rounds it to a rate that the clk can actually * use which is then returned. If clk doesn't support round_rate operation * then the parent rate is returned. */ -long clk_round_rate(struct clk *clk, unsigned long rate) +long clk_round_rate(struct clk *clk_user, unsigned long rate) { - unsigned long ret; - - clk_prepare_lock(); - ret = __clk_round_rate(clk, rate); - clk_prepare_unlock(); + if (!clk_user) + return 0; - return ret; + return clk_provider_round_rate(clk_to_clk_core(clk_user), rate); } EXPORT_SYMBOL_GPL(clk_round_rate); /** * __clk_notify - call clk notifier chain - * @clk: struct clk * that is changing rate + * @clk: struct clk_core * that is changing rate * @msg: clk notifier type (see include/linux/clk.h) * @old_rate: old clk rate * @new_rate: new clk rate * * Triggers a notifier call chain on the clk rate-change notification - * for 'clk'. Passes a pointer to the struct clk and the previous + * for 'clk'. Passes a pointer to the struct clk_core and the previous * and current rates to the notifier callback. Intended to be called by * internal clock code only. Returns NOTIFY_DONE from the last driver * called if all went well, or NOTIFY_STOP or NOTIFY_BAD immediately if * a driver returns that. */ -static int __clk_notify(struct clk *clk, unsigned long msg, +static int __clk_notify(struct clk_core *clk, unsigned long msg, unsigned long old_rate, unsigned long new_rate) { struct clk_notifier *cn; @@ -1051,10 +1115,10 @@ static int __clk_notify(struct clk *clk, unsigned long msg, * * Caller must hold prepare_lock. */ -static void __clk_recalc_accuracies(struct clk *clk) +static void __clk_recalc_accuracies(struct clk_core *clk) { unsigned long parent_accuracy = 0; - struct clk *child; + struct clk_core *child; if (clk->parent) parent_accuracy = clk->parent->accuracy; @@ -1069,16 +1133,7 @@ static void __clk_recalc_accuracies(struct clk *clk) __clk_recalc_accuracies(child); } -/** - * clk_get_accuracy - return the accuracy of clk - * @clk: the clk whose accuracy is being returned - * - * Simply returns the cached accuracy of the clk, unless - * CLK_GET_ACCURACY_NOCACHE flag is set, which means a recalc_rate will be - * issued. - * If clk is NULL then returns 0. - */ -long clk_get_accuracy(struct clk *clk) +static long __clk_get_accuracy_internal(struct clk_core *clk) { unsigned long accuracy; @@ -1091,9 +1146,23 @@ long clk_get_accuracy(struct clk *clk) return accuracy; } + +/** + * clk_get_accuracy - return the accuracy of clk + * @clk_user: the clk whose accuracy is being returned + * + * Simply returns the cached accuracy of the clk, unless + * CLK_GET_ACCURACY_NOCACHE flag is set, which means a recalc_rate will be + * issued. + * If clk is NULL then returns 0. + */ +long clk_get_accuracy(struct clk *clk_user) +{ + return __clk_get_accuracy_internal(clk_to_clk_core(clk_user)); +} EXPORT_SYMBOL_GPL(clk_get_accuracy); -static unsigned long clk_recalc(struct clk *clk, unsigned long parent_rate) +static unsigned long clk_recalc(struct clk_core *clk, unsigned long parent_rate) { if (clk->ops->recalc_rate) return clk->ops->recalc_rate(clk->hw, parent_rate); @@ -1114,11 +1183,11 @@ static unsigned long clk_recalc(struct clk *clk, unsigned long parent_rate) * * Caller must hold prepare_lock. */ -static void __clk_recalc_rates(struct clk *clk, unsigned long msg) +static void __clk_recalc_rates(struct clk_core *clk, unsigned long msg) { unsigned long old_rate; unsigned long parent_rate = 0; - struct clk *child; + struct clk_core *child; old_rate = clk->rate; @@ -1138,15 +1207,7 @@ static void __clk_recalc_rates(struct clk *clk, unsigned long msg) __clk_recalc_rates(child, msg); } -/** - * clk_get_rate - return the rate of clk - * @clk: the clk whose rate is being returned - * - * Simply returns the cached rate of the clk, unless CLK_GET_RATE_NOCACHE flag - * is set, which means a recalc_rate will be issued. - * If clk is NULL then returns 0. - */ -unsigned long clk_get_rate(struct clk *clk) +unsigned long clk_provider_get_rate(struct clk_core *clk) { unsigned long rate; @@ -1160,15 +1221,32 @@ unsigned long clk_get_rate(struct clk *clk) return rate; } +EXPORT_SYMBOL_GPL(clk_provider_get_rate); + +/** + * clk_get_rate - return the rate of clk + * @clk_user: the clk whose rate is being returned + * + * Simply returns the cached rate of the clk, unless CLK_GET_RATE_NOCACHE flag + * is set, which means a recalc_rate will be issued. + * If clk is NULL then returns 0. + */ +unsigned long clk_get_rate(struct clk *clk_user) +{ + if (!clk_user) + return 0; + + return clk_provider_get_rate(clk_to_clk_core(clk_user)); +} EXPORT_SYMBOL_GPL(clk_get_rate); -static int clk_fetch_parent_index(struct clk *clk, struct clk *parent) +static int clk_fetch_parent_index(struct clk_core *clk, struct clk_core *parent) { int i; if (!clk->parents) { clk->parents = kcalloc(clk->num_parents, - sizeof(struct clk *), GFP_KERNEL); + sizeof(struct clk_core *), GFP_KERNEL); if (!clk->parents) return -ENOMEM; } @@ -1194,7 +1272,7 @@ static int clk_fetch_parent_index(struct clk *clk, struct clk *parent) return -EINVAL; } -static void clk_reparent(struct clk *clk, struct clk *new_parent) +static void clk_reparent(struct clk_core *clk, struct clk_core *new_parent) { hlist_del(&clk->child_node); @@ -1211,10 +1289,10 @@ static void clk_reparent(struct clk *clk, struct clk *new_parent) clk->parent = new_parent; } -static struct clk *__clk_set_parent_before(struct clk *clk, struct clk *parent) +static struct clk_core *__clk_set_parent_before(struct clk_core *clk, struct clk_core *parent) { unsigned long flags; - struct clk *old_parent = clk->parent; + struct clk_core *old_parent = clk->parent; /* * Migrate prepare state between parents and prevent race with @@ -1235,8 +1313,8 @@ static struct clk *__clk_set_parent_before(struct clk *clk, struct clk *parent) */ if (clk->prepare_count) { __clk_prepare(parent); - clk_enable(parent); - clk_enable(clk); + clk_provider_enable(parent); + clk_provider_enable(clk); } /* update the clk tree topology */ @@ -1247,25 +1325,25 @@ static struct clk *__clk_set_parent_before(struct clk *clk, struct clk *parent) return old_parent; } -static void __clk_set_parent_after(struct clk *clk, struct clk *parent, - struct clk *old_parent) +static void __clk_set_parent_after(struct clk_core *clk, struct clk_core *parent, + struct clk_core *old_parent) { /* * Finish the migration of prepare state and undo the changes done * for preventing a race with clk_enable(). */ if (clk->prepare_count) { - clk_disable(clk); - clk_disable(old_parent); + clk_provider_disable(clk); + clk_provider_disable(old_parent); __clk_unprepare(old_parent); } } -static int __clk_set_parent(struct clk *clk, struct clk *parent, u8 p_index) +static int __clk_set_parent(struct clk_core *clk, struct clk_core *parent, u8 p_index) { unsigned long flags; int ret = 0; - struct clk *old_parent; + struct clk_core *old_parent; old_parent = __clk_set_parent_before(clk, parent); @@ -1279,8 +1357,8 @@ static int __clk_set_parent(struct clk *clk, struct clk *parent, u8 p_index) clk_enable_unlock(flags); if (clk->prepare_count) { - clk_disable(clk); - clk_disable(parent); + clk_provider_disable(clk); + clk_provider_disable(parent); __clk_unprepare(parent); } return ret; @@ -1307,9 +1385,9 @@ static int __clk_set_parent(struct clk *clk, struct clk *parent, u8 p_index) * * Caller must hold prepare_lock. */ -static int __clk_speculate_rates(struct clk *clk, unsigned long parent_rate) +static int __clk_speculate_rates(struct clk_core *clk, unsigned long parent_rate) { - struct clk *child; + struct clk_core *child; unsigned long new_rate; int ret = NOTIFY_DONE; @@ -1335,10 +1413,10 @@ out: return ret; } -static void clk_calc_subtree(struct clk *clk, unsigned long new_rate, - struct clk *new_parent, u8 p_index) +static void clk_calc_subtree(struct clk_core *clk, unsigned long new_rate, + struct clk_core *new_parent, u8 p_index) { - struct clk *child; + struct clk_core *child; clk->new_rate = new_rate; clk->new_parent = new_parent; @@ -1358,10 +1436,10 @@ static void clk_calc_subtree(struct clk *clk, unsigned long new_rate, * calculate the new rates returning the topmost clock that has to be * changed. */ -static struct clk *clk_calc_new_rates(struct clk *clk, unsigned long rate) +static struct clk_core *clk_calc_new_rates(struct clk_core *clk, unsigned long rate) { - struct clk *top = clk; - struct clk *old_parent, *parent; + struct clk_core *top = clk; + struct clk_core *old_parent, *parent; unsigned long best_parent_rate = 0; unsigned long new_rate; int p_index = 0; @@ -1427,9 +1505,9 @@ out: * so that in case of an error we can walk down the whole tree again and * abort the change. */ -static struct clk *clk_propagate_rate_change(struct clk *clk, unsigned long event) +static struct clk_core *clk_propagate_rate_change(struct clk_core *clk, unsigned long event) { - struct clk *child, *tmp_clk, *fail_clk = NULL; + struct clk_core *child, *tmp_clk, *fail_clk = NULL; int ret = NOTIFY_DONE; if (clk->rate == clk->new_rate) @@ -1464,13 +1542,13 @@ static struct clk *clk_propagate_rate_change(struct clk *clk, unsigned long even * walk down a subtree and set the new rates notifying the rate * change on the way */ -static void clk_change_rate(struct clk *clk) +static void clk_change_rate(struct clk_core *clk) { - struct clk *child; + struct clk_core *child; unsigned long old_rate; unsigned long best_parent_rate = 0; bool skip_set_rate = false; - struct clk *old_parent; + struct clk_core *old_parent; old_rate = clk->rate; @@ -1514,30 +1592,9 @@ static void clk_change_rate(struct clk *clk) clk_change_rate(clk->new_child); } -/** - * clk_set_rate - specify a new rate for clk - * @clk: the clk whose rate is being changed - * @rate: the new rate for clk - * - * In the simplest case clk_set_rate will only adjust the rate of clk. - * - * Setting the CLK_SET_RATE_PARENT flag allows the rate change operation to - * propagate up to clk's parent; whether or not this happens depends on the - * outcome of clk's .round_rate implementation. If *parent_rate is unchanged - * after calling .round_rate then upstream parent propagation is ignored. If - * *parent_rate comes back with a new rate for clk's parent then we propagate - * up to clk's parent and set its rate. Upward propagation will continue - * until either a clk does not support the CLK_SET_RATE_PARENT flag or - * .round_rate stops requesting changes to clk's parent_rate. - * - * Rate changes are accomplished via tree traversal that also recalculates the - * rates for the clocks and fires off POST_RATE_CHANGE notifiers. - * - * Returns 0 on success, -EERROR otherwise. - */ -int clk_set_rate(struct clk *clk, unsigned long rate) +int clk_provider_set_rate(struct clk_core *clk, unsigned long rate) { - struct clk *top, *fail_clk; + struct clk_core *top, *fail_clk; int ret = 0; if (!clk) @@ -1547,7 +1604,7 @@ int clk_set_rate(struct clk *clk, unsigned long rate) clk_prepare_lock(); /* bail early if nothing to do */ - if (rate == clk_get_rate(clk)) + if (rate == clk_provider_get_rate(clk)) goto out; if ((clk->flags & CLK_SET_RATE_GATE) && clk->prepare_count) { @@ -1580,17 +1637,41 @@ out: return ret; } -EXPORT_SYMBOL_GPL(clk_set_rate); +EXPORT_SYMBOL_GPL(clk_provider_set_rate); /** - * clk_get_parent - return the parent of a clk - * @clk: the clk whose parent gets returned + * clk_set_rate - specify a new rate for clk + * @clk_user: the clk whose rate is being changed + * @rate: the new rate for clk * - * Simply returns clk->parent. Returns NULL if clk is NULL. + * In the simplest case clk_set_rate will only adjust the rate of clk. + * + * Setting the CLK_SET_RATE_PARENT flag allows the rate change operation to + * propagate up to clk's parent; whether or not this happens depends on the + * outcome of clk's .round_rate implementation. If *parent_rate is unchanged + * after calling .round_rate then upstream parent propagation is ignored. If + * *parent_rate comes back with a new rate for clk's parent then we propagate + * up to clk's parent and set its rate. Upward propagation will continue + * until either a clk does not support the CLK_SET_RATE_PARENT flag or + * .round_rate stops requesting changes to clk's parent_rate. + * + * Rate changes are accomplished via tree traversal that also recalculates the + * rates for the clocks and fires off POST_RATE_CHANGE notifiers. + * + * Returns 0 on success, -EERROR otherwise. */ -struct clk *clk_get_parent(struct clk *clk) +int clk_set_rate(struct clk *clk_user, unsigned long rate) { - struct clk *parent; + if (!clk_user) + return 0; + + return clk_provider_set_rate(clk_to_clk_core(clk_user), rate); +} +EXPORT_SYMBOL_GPL(clk_set_rate); + +struct clk_core *clk_provider_get_parent(struct clk_core *clk) +{ + struct clk_core *parent; clk_prepare_lock(); parent = __clk_get_parent(clk); @@ -1598,8 +1679,35 @@ struct clk *clk_get_parent(struct clk *clk) return parent; } +EXPORT_SYMBOL_GPL(clk_provider_get_parent); + +/** + * clk_get_parent - return the parent of a clk + * @clk_user: the clk whose parent gets returned + * + * Simply returns clk->parent. Returns NULL if clk is NULL. + */ +struct clk *clk_get_parent(struct clk *clk_user) +{ + struct clk_core *clk; + struct clk_core *parent; + + if (!clk_user) + return NULL; + + clk = clk_to_clk_core(clk_user); + parent = clk_provider_get_parent(clk); + + return __clk_create_clk(parent); +} EXPORT_SYMBOL_GPL(clk_get_parent); +const char *clk_get_name(struct clk *clk_user) +{ + return __clk_get_name(clk_to_clk_core(clk_user)); +} +EXPORT_SYMBOL_GPL(clk_get_name); + /* * .get_parent is mandatory for clocks with multiple possible parents. It is * optional for single-parent clocks. Always call .get_parent if it is @@ -1609,9 +1717,9 @@ EXPORT_SYMBOL_GPL(clk_get_parent); * .parents array exists, and if so use it to avoid an expensive tree * traversal. If .parents does not exist then walk the tree with __clk_lookup. */ -static struct clk *__clk_init_parent(struct clk *clk) +static struct clk_core *__clk_init_parent(struct clk_core *clk) { - struct clk *ret = NULL; + struct clk_core *ret = NULL; u8 index; /* handle the trivial cases */ @@ -1643,7 +1751,7 @@ static struct clk *__clk_init_parent(struct clk *clk) if (!clk->parents) clk->parents = - kcalloc(clk->num_parents, sizeof(struct clk *), + kcalloc(clk->num_parents, sizeof(struct clk_core *), GFP_KERNEL); ret = clk_get_parent_by_index(clk, index); @@ -1652,31 +1760,14 @@ out: return ret; } -void __clk_reparent(struct clk *clk, struct clk *new_parent) +void __clk_reparent(struct clk_core *clk, struct clk_core *new_parent) { clk_reparent(clk, new_parent); __clk_recalc_accuracies(clk); __clk_recalc_rates(clk, POST_RATE_CHANGE); } -/** - * clk_set_parent - switch the parent of a mux clk - * @clk: the mux clk whose input we are switching - * @parent: the new input to clk - * - * Re-parent clk to use parent as its new input source. If clk is in - * prepared state, the clk will get enabled for the duration of this call. If - * that's not acceptable for a specific clk (Eg: the consumer can't handle - * that, the reparenting is glitchy in hardware, etc), use the - * CLK_SET_PARENT_GATE flag to allow reparenting only when clk is unprepared. - * - * After successfully changing clk's parent clk_set_parent will update the - * clk topology, sysfs topology and propagate rate recalculation via - * __clk_recalc_rates. - * - * Returns 0 on success, -EERROR otherwise. - */ -int clk_set_parent(struct clk *clk, struct clk *parent) +int clk_provider_set_parent(struct clk_core *clk, struct clk_core *parent) { int ret = 0; int p_index = 0; @@ -1736,6 +1827,38 @@ out: return ret; } +EXPORT_SYMBOL_GPL(clk_provider_set_parent); + +/** + * clk_set_parent - switch the parent of a mux clk + * @clk_user: the mux clk whose input we are switching + * @parent_user: the new input to clk + * + * Re-parent clk to use parent as its new input source. If clk is in + * prepared state, the clk will get enabled for the duration of this call. If + * that's not acceptable for a specific clk (Eg: the consumer can't handle + * that, the reparenting is glitchy in hardware, etc), use the + * CLK_SET_PARENT_GATE flag to allow reparenting only when clk is unprepared. + * + * After successfully changing clk's parent clk_set_parent will update the + * clk topology, sysfs topology and propagate rate recalculation via + * __clk_recalc_rates. + * + * Returns 0 on success, -EERROR otherwise. + */ +int clk_set_parent(struct clk *clk_user, struct clk *parent_user) +{ + struct clk_core *clk; + struct clk_core *parent; + + if (!clk_user) + return 0; + + clk = clk_to_clk_core(clk_user); + parent = clk_to_clk_core(parent_user); + + return clk_provider_set_parent(clk, parent); +} EXPORT_SYMBOL_GPL(clk_set_parent); /** @@ -1746,10 +1869,10 @@ EXPORT_SYMBOL_GPL(clk_set_parent); * Initializes the lists in struct clk, queries the hardware for the * parent and rate and sets them both. */ -int __clk_init(struct device *dev, struct clk *clk) +int __clk_init(struct device *dev, struct clk_core *clk) { int i, ret = 0; - struct clk *orphan; + struct clk_core *orphan; struct hlist_node *tmp2; if (!clk) @@ -1797,7 +1920,7 @@ int __clk_init(struct device *dev, struct clk *clk) __func__, clk->name); /* - * Allocate an array of struct clk *'s to avoid unnecessary string + * Allocate an array of struct clk_core *'s to avoid unnecessary string * look-ups of clk's possible parents. This can fail for clocks passed * in to clk_init during early boot; thus any access to clk->parents[] * must always check for a NULL pointer and try to populate it if @@ -1807,7 +1930,7 @@ int __clk_init(struct device *dev, struct clk *clk) * for clock drivers to statically initialize clk->parents. */ if (clk->num_parents > 1 && !clk->parents) { - clk->parents = kcalloc(clk->num_parents, sizeof(struct clk *), + clk->parents = kcalloc(clk->num_parents, sizeof(struct clk_core *), GFP_KERNEL); /* * __clk_lookup returns NULL for parents that have not been @@ -1913,7 +2036,7 @@ out: * * Same as clk_register, except that the .clk field inside hw shall point to a * preallocated (generally statically allocated) struct clk. None of the fields - * of the struct clk need to be initialized. + * of the struct clk_core need to be initialized. * * The data pointed to by .init and .clk field shall NOT be marked as init * data. @@ -1925,10 +2048,10 @@ out: * separate C file from the logic that implements its operations. Returns 0 * on success, otherwise an error code. */ -struct clk *__clk_register(struct device *dev, struct clk_hw *hw) +struct clk_core *__clk_register(struct device *dev, struct clk_hw *hw) { int ret; - struct clk *clk; + struct clk_core *clk; clk = hw->clk; clk->name = hw->init->name; @@ -1956,15 +2079,15 @@ EXPORT_SYMBOL_GPL(__clk_register); * @hw: link to hardware-specific clock data * * clk_register is the primary interface for populating the clock tree with new - * clock nodes. It returns a pointer to the newly allocated struct clk which + * clock nodes. It returns a pointer to the newly allocated struct clk_core which * cannot be dereferenced by driver code but may be used in conjuction with the * rest of the clock API. In the event of an error clk_register will return an * error code; drivers must test for an error code after calling clk_register. */ -struct clk *clk_register(struct device *dev, struct clk_hw *hw) +struct clk_core *clk_register(struct device *dev, struct clk_hw *hw) { int i, ret; - struct clk *clk; + struct clk_core *clk; clk = kzalloc(sizeof(*clk), GFP_KERNEL); if (!clk) { @@ -2032,7 +2155,7 @@ EXPORT_SYMBOL_GPL(clk_register); */ static void __clk_release(struct kref *ref) { - struct clk *clk = container_of(ref, struct clk, ref); + struct clk_core *clk = container_of(ref, struct clk_core, ref); int i = clk->num_parents; kfree(clk->parents); @@ -2083,7 +2206,7 @@ static const struct clk_ops clk_nodrv_ops = { * clk_unregister - unregister a currently registered clock * @clk: clock to unregister */ -void clk_unregister(struct clk *clk) +void clk_unregister(struct clk_core *clk) { unsigned long flags; @@ -2105,12 +2228,12 @@ void clk_unregister(struct clk *clk) clk_enable_unlock(flags); if (!hlist_empty(&clk->children)) { - struct clk *child; + struct clk_core *child; struct hlist_node *t; /* Reparent all children to the orphan list. */ hlist_for_each_entry_safe(child, t, &clk->children, child_node) - clk_set_parent(child, NULL); + clk_provider_set_parent(child, NULL); } clk_debug_unregister(clk); @@ -2129,9 +2252,15 @@ EXPORT_SYMBOL_GPL(clk_unregister); static void devm_clk_release(struct device *dev, void *res) { - clk_unregister(*(struct clk **)res); + clk_unregister(*(struct clk_core **)res); } +struct clk_core *clk_to_clk_core(struct clk *clk) +{ + return clk->core; +} +EXPORT_SYMBOL_GPL(clk_to_clk_core); + /** * devm_clk_register - resource managed clk_register() * @dev: device that is registering this clock @@ -2141,10 +2270,10 @@ static void devm_clk_release(struct device *dev, void *res) * automatically clk_unregister()ed on driver detach. See clk_register() for * more information. */ -struct clk *devm_clk_register(struct device *dev, struct clk_hw *hw) +struct clk_core *devm_clk_register(struct device *dev, struct clk_hw *hw) { - struct clk *clk; - struct clk **clkp; + struct clk_core *clk; + struct clk_core **clkp; clkp = devres_alloc(devm_clk_release, sizeof(*clkp), GFP_KERNEL); if (!clkp) @@ -2164,7 +2293,7 @@ EXPORT_SYMBOL_GPL(devm_clk_register); static int devm_clk_match(struct device *dev, void *res, void *data) { - struct clk *c = res; + struct clk_core *c = res; if (WARN_ON(!c)) return 0; return c == data; @@ -2178,7 +2307,7 @@ static int devm_clk_match(struct device *dev, void *res, void *data) * this function will not need to be called and the resource management * code will ensure that the resource is freed. */ -void devm_clk_unregister(struct device *dev, struct clk *clk) +void devm_clk_unregister(struct device *dev, struct clk_core *clk) { WARN_ON(devres_release(dev, devm_clk_release, devm_clk_match, clk)); } @@ -2187,7 +2316,7 @@ EXPORT_SYMBOL_GPL(devm_clk_unregister); /* * clkdev helpers */ -int __clk_get(struct clk *clk) +int __clk_get(struct clk_core *clk) { if (clk) { if (!try_module_get(clk->owner)) @@ -2199,7 +2328,7 @@ int __clk_get(struct clk *clk) } EXPORT_SYMBOL(__clk_get); -void __clk_put(struct clk *clk) +void __clk_put(struct clk_core *clk) { if (!clk || WARN_ON_ONCE(IS_ERR(clk))) return; @@ -2214,28 +2343,7 @@ EXPORT_SYMBOL(__clk_put); /*** clk rate change notifiers ***/ -/** - * clk_notifier_register - add a clk rate change notifier - * @clk: struct clk * to watch - * @nb: struct notifier_block * with callback info - * - * Request notification when clk's rate changes. This uses an SRCU - * notifier because we want it to block and notifier unregistrations are - * uncommon. The callbacks associated with the notifier must not - * re-enter into the clk framework by calling any top-level clk APIs; - * this will cause a nested prepare_lock mutex. - * - * In all notification cases cases (pre, post and abort rate change) the - * original clock rate is passed to the callback via struct - * clk_notifier_data.old_rate and the new frequency is passed via struct - * clk_notifier_data.new_rate. - * - * clk_notifier_register() must be called from non-atomic context. - * Returns -EINVAL if called with null arguments, -ENOMEM upon - * allocation failure; otherwise, passes along the return value of - * srcu_notifier_chain_register(). - */ -int clk_notifier_register(struct clk *clk, struct notifier_block *nb) +int clk_provider_notifier_register(struct clk_core *clk, struct notifier_block *nb) { struct clk_notifier *cn; int ret = -ENOMEM; @@ -2271,20 +2379,38 @@ out: return ret; } -EXPORT_SYMBOL_GPL(clk_notifier_register); +EXPORT_SYMBOL_GPL(clk_provider_notifier_register); /** - * clk_notifier_unregister - remove a clk rate change notifier - * @clk: struct clk * + * clk_notifier_register - add a clk rate change notifier + * @clk_user: struct clk * to watch * @nb: struct notifier_block * with callback info * - * Request no further notification for changes to 'clk' and frees memory - * allocated in clk_notifier_register. + * Request notification when clk's rate changes. This uses an SRCU + * notifier because we want it to block and notifier unregistrations are + * uncommon. The callbacks associated with the notifier must not + * re-enter into the clk framework by calling any top-level clk APIs; + * this will cause a nested prepare_lock mutex. * - * Returns -EINVAL if called with null arguments; otherwise, passes - * along the return value of srcu_notifier_chain_unregister(). + * In all notification cases cases (pre, post and abort rate change) the + * original clock rate is passed to the callback via struct + * clk_notifier_data.old_rate and the new frequency is passed via struct + * clk_notifier_data.new_rate. + * + * clk_notifier_register() must be called from non-atomic context. + * Returns -EINVAL if called with null arguments, -ENOMEM upon + * allocation failure; otherwise, passes along the return value of + * srcu_notifier_chain_register(). */ -int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb) +int clk_notifier_register(struct clk *clk_user, struct notifier_block *nb) +{ + struct clk_core *clk = clk_to_clk_core(clk_user); + + return clk_provider_notifier_register(clk, nb); +} +EXPORT_SYMBOL_GPL(clk_notifier_register); + +int clk_provider_notifier_unregister(struct clk_core *clk, struct notifier_block *nb) { struct clk_notifier *cn = NULL; int ret = -EINVAL; @@ -2318,6 +2444,25 @@ int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb) return ret; } +EXPORT_SYMBOL_GPL(clk_provider_notifier_unregister); + +/** + * clk_notifier_unregister - remove a clk rate change notifier + * @clk_user: struct clk_core * + * @nb: struct notifier_block * with callback info + * + * Request no further notification for changes to 'clk' and frees memory + * allocated in clk_notifier_register. + * + * Returns -EINVAL if called with null arguments; otherwise, passes + * along the return value of srcu_notifier_chain_unregister(). + */ +int clk_notifier_unregister(struct clk *clk_user, struct notifier_block *nb) +{ + struct clk_core *clk = clk_to_clk_core(clk_user); + + return clk_provider_notifier_unregister(clk, nb); +} EXPORT_SYMBOL_GPL(clk_notifier_unregister); #ifdef CONFIG_OF @@ -2325,7 +2470,7 @@ EXPORT_SYMBOL_GPL(clk_notifier_unregister); * struct of_clk_provider - Clock provider registration structure * @link: Entry in global list of clock providers * @node: Pointer to device tree node of clock provider - * @get: Get clock callback. Returns NULL or a struct clk for the + * @get: Get clock callback. Returns NULL or a struct clk_core for the * given clock specifier * @data: context pointer to be passed into @get callback */ @@ -2333,7 +2478,7 @@ struct of_clk_provider { struct list_head link; struct device_node *node; - struct clk *(*get)(struct of_phandle_args *clkspec, void *data); + struct clk_core *(*get)(struct of_phandle_args *clkspec, void *data); void *data; }; @@ -2354,14 +2499,14 @@ void of_clk_unlock(void) mutex_unlock(&of_clk_mutex); } -struct clk *of_clk_src_simple_get(struct of_phandle_args *clkspec, +struct clk_core *of_clk_src_simple_get(struct of_phandle_args *clkspec, void *data) { return data; } EXPORT_SYMBOL_GPL(of_clk_src_simple_get); -struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data) +struct clk_core *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data) { struct clk_onecell_data *clk_data = data; unsigned int idx = clkspec->args[0]; @@ -2382,7 +2527,7 @@ EXPORT_SYMBOL_GPL(of_clk_src_onecell_get); * @data: context pointer for @clk_src_get callback. */ int of_clk_add_provider(struct device_node *np, - struct clk *(*clk_src_get)(struct of_phandle_args *clkspec, + struct clk_core *(*clk_src_get)(struct of_phandle_args *clkspec, void *data), void *data) { @@ -2431,10 +2576,10 @@ void of_clk_del_provider(struct device_node *np) } EXPORT_SYMBOL_GPL(of_clk_del_provider); -struct clk *__of_clk_get_from_provider(struct of_phandle_args *clkspec) +struct clk_core *__of_clk_get_from_provider(struct of_phandle_args *clkspec) { struct of_clk_provider *provider; - struct clk *clk = ERR_PTR(-EPROBE_DEFER); + struct clk_core *clk = ERR_PTR(-EPROBE_DEFER); /* Check if we have such a provider in our array */ list_for_each_entry(provider, &of_clk_providers, link) { @@ -2447,9 +2592,9 @@ struct clk *__of_clk_get_from_provider(struct of_phandle_args *clkspec) return clk; } -struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec) +struct clk_core *of_clk_get_from_provider(struct of_phandle_args *clkspec) { - struct clk *clk; + struct clk_core *clk; mutex_lock(&of_clk_mutex); clk = __of_clk_get_from_provider(clkspec); @@ -2524,11 +2669,11 @@ static int parent_ready(struct device_node *np) int i = 0; while (true) { - struct clk *clk = of_clk_get(np, i); + struct clk_core *clk = of_clk_provider_get(np, i); /* this parent is ready we can check the next one */ if (!IS_ERR(clk)) { - clk_put(clk); + __clk_put(clk); i++; continue; } diff --git a/drivers/clk/clk.h b/drivers/clk/clk.h index d278572..3b3068b 100644 --- a/drivers/clk/clk.h +++ b/drivers/clk/clk.h @@ -9,9 +9,15 @@ * published by the Free Software Foundation. */ +#include + #if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK) struct clk_core *of_clk_get_by_clkspec(struct of_phandle_args *clkspec); struct clk_core *__of_clk_get_from_provider(struct of_phandle_args *clkspec); void of_clk_lock(void); void of_clk_unlock(void); #endif + +#if defined(CONFIG_COMMON_CLK) +struct clk *__clk_create_clk(struct clk_core *clk_core); +#endif diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c index c751d0c..060041b 100644 --- a/drivers/clk/clkdev.c +++ b/drivers/clk/clkdev.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -33,13 +34,13 @@ static DEFINE_MUTEX(clocks_mutex); * of_clk_get_by_clkspec() - Lookup a clock form a clock provider * @clkspec: pointer to a clock specifier data structure * - * This function looks up a struct clk from the registered list of clock + * This function looks up a struct clk_core from the registered list of clock * providers, an input is a clock specifier data structure as returned * from the of_parse_phandle_with_args() function call. */ -struct clk *of_clk_get_by_clkspec(struct of_phandle_args *clkspec) +struct clk_core *of_clk_get_by_clkspec(struct of_phandle_args *clkspec) { - struct clk *clk; + struct clk_core *clk; if (!clkspec) return ERR_PTR(-EINVAL); @@ -54,10 +55,10 @@ struct clk *of_clk_get_by_clkspec(struct of_phandle_args *clkspec) return clk; } -struct clk *of_clk_get(struct device_node *np, int index) +struct clk_core *of_clk_provider_get(struct device_node *np, int index) { struct of_phandle_args clkspec; - struct clk *clk; + clk_core_t *clk; int rc; if (index < 0) @@ -72,20 +73,17 @@ struct clk *of_clk_get(struct device_node *np, int index) of_node_put(clkspec.np); return clk; } +EXPORT_SYMBOL(of_clk_provider_get); + +struct clk *of_clk_get(struct device_node *np, int index) +{ + return __clk_create_clk(of_clk_provider_get(np, index)); +} EXPORT_SYMBOL(of_clk_get); -/** - * of_clk_get_by_name() - Parse and lookup a clock referenced by a device node - * @np: pointer to clock consumer node - * @name: name of consumer's clock input, or NULL for the first clock reference - * - * This function parses the clocks and clock-names properties, - * and uses them to look up the struct clk from the registered list of clock - * providers. - */ -struct clk *of_clk_get_by_name(struct device_node *np, const char *name) +struct clk_core *of_clk_provider_get_by_name(struct device_node *np, const char *name) { - struct clk *clk = ERR_PTR(-ENOENT); + struct clk_core *clk = ERR_PTR(-ENOENT); /* Walk up the tree of devices looking for a clock that matches */ while (np) { @@ -98,7 +96,7 @@ struct clk *of_clk_get_by_name(struct device_node *np, const char *name) */ if (name) index = of_property_match_string(np, "clock-names", name); - clk = of_clk_get(np, index); + clk = of_clk_provider_get(np, index); if (!IS_ERR(clk)) break; else if (name && index >= 0) { @@ -120,11 +118,25 @@ struct clk *of_clk_get_by_name(struct device_node *np, const char *name) return clk; } + +/** + * of_clk_get_by_name() - Parse and lookup a clock referenced by a device node + * @np: pointer to clock consumer node + * @name: name of consumer's clock input, or NULL for the first clock reference + * + * This function parses the clocks and clock-names properties, + * and uses them to look up the clock from the registered list of clock + * providers. + */ +struct clk *of_clk_get_by_name(struct device_node *np, const char *name) +{ + return __clk_create_clk(of_clk_provider_get_by_name(np, name)); +} EXPORT_SYMBOL(of_clk_get_by_name); #endif /* - * Find the correct struct clk for the device and connection ID. + * Find the correct clock for the device and connection ID. * We do slightly fuzzy matching here: * An entry with a NULL ID is assumed to be a wildcard. * If an entry has a device ID, it must match @@ -166,8 +178,32 @@ static struct clk_lookup *clk_find(const char *dev_id, const char *con_id) return cl; } +#if defined(CONFIG_COMMON_CLK) +struct clk_core *clk_provider_get_sys(const char *dev_id, const char *con_id) +{ + struct clk_lookup *cl; + + mutex_lock(&clocks_mutex); + cl = clk_find(dev_id, con_id); + if (cl && !__clk_get(cl->clk)) + cl = NULL; + mutex_unlock(&clocks_mutex); + + if (!cl) + return ERR_PTR(-ENOENT); + + return cl->clk; +} +EXPORT_SYMBOL_GPL(clk_provider_get_sys); +#endif + struct clk *clk_get_sys(const char *dev_id, const char *con_id) { +#if defined(CONFIG_COMMON_CLK) + struct clk_core *clk = clk_provider_get_sys(dev_id, con_id); + + return __clk_create_clk(clk); +#else struct clk_lookup *cl; mutex_lock(&clocks_mutex); @@ -176,12 +212,38 @@ struct clk *clk_get_sys(const char *dev_id, const char *con_id) cl = NULL; mutex_unlock(&clocks_mutex); - return cl ? cl->clk : ERR_PTR(-ENOENT); + if (!cl) + return ERR_PTR(-ENOENT); + + return cl->clk; +#endif } EXPORT_SYMBOL(clk_get_sys); +#if defined(CONFIG_COMMON_CLK) +struct clk_core *clk_provider_get(struct device *dev, const char *con_id) +{ + const char *dev_id = dev ? dev_name(dev) : NULL; + struct clk_core *clk; + + if (dev) { + clk = of_clk_provider_get_by_name(dev->of_node, con_id); + if (!IS_ERR(clk)) + return clk; + if (PTR_ERR(clk) == -EPROBE_DEFER) + return clk; + } + + return clk_provider_get_sys(dev_id, con_id); +} +EXPORT_SYMBOL(clk_provider_get); +#endif + struct clk *clk_get(struct device *dev, const char *con_id) { +#if defined(CONFIG_COMMON_CLK) + return __clk_create_clk(clk_provider_get(dev, con_id)); +#else const char *dev_id = dev ? dev_name(dev) : NULL; struct clk *clk; @@ -194,12 +256,20 @@ struct clk *clk_get(struct device *dev, const char *con_id) } return clk_get_sys(dev_id, con_id); +#endif } EXPORT_SYMBOL(clk_get); void clk_put(struct clk *clk) { +#if defined(CONFIG_COMMON_CLK) + clk_core_t *core = clk_to_clk_core(clk); + + kfree(clk); + __clk_put(core); +#else __clk_put(clk); +#endif } EXPORT_SYMBOL(clk_put); @@ -231,7 +301,7 @@ struct clk_lookup_alloc { }; static struct clk_lookup * __init_refok -vclkdev_alloc(struct clk *clk, const char *con_id, const char *dev_fmt, +vclkdev_alloc(clk_core_t *clk, const char *con_id, const char *dev_fmt, va_list ap) { struct clk_lookup_alloc *cla; @@ -255,7 +325,7 @@ vclkdev_alloc(struct clk *clk, const char *con_id, const char *dev_fmt, } struct clk_lookup * __init_refok -clkdev_alloc(struct clk *clk, const char *con_id, const char *dev_fmt, ...) +clkdev_alloc(clk_core_t *clk, const char *con_id, const char *dev_fmt, ...) { struct clk_lookup *cl; va_list ap; @@ -277,7 +347,11 @@ int clk_add_alias(const char *alias, const char *alias_dev_name, char *id, if (IS_ERR(r)) return PTR_ERR(r); +#ifdef CONFIG_COMMON_CLK + l = clkdev_alloc(clk_to_clk_core(r), alias, alias_dev_name); +#else l = clkdev_alloc(r, alias, alias_dev_name); +#endif clk_put(r); if (!l) return -ENODEV; @@ -300,7 +374,7 @@ EXPORT_SYMBOL(clkdev_drop); /** * clk_register_clkdev - register one clock lookup for a struct clk - * @clk: struct clk to associate with all clk_lookups + * @clk: clock to associate with all clk_lookups * @con_id: connection ID string on device * @dev_id: format string describing device name * @@ -312,7 +386,7 @@ EXPORT_SYMBOL(clkdev_drop); * those. This is to permit this function to be called immediately * after clk_register(). */ -int clk_register_clkdev(struct clk *clk, const char *con_id, +int clk_register_clkdev(clk_core_t *clk, const char *con_id, const char *dev_fmt, ...) { struct clk_lookup *cl; @@ -335,7 +409,7 @@ int clk_register_clkdev(struct clk *clk, const char *con_id, /** * clk_register_clkdevs - register a set of clk_lookup for a struct clk - * @clk: struct clk to associate with all clk_lookups + * @clk: clock to associate with all clk_lookups * @cl: array of clk_lookup structures with con_id and dev_id pre-initialized * @num: number of clk_lookup structures to register * @@ -344,7 +418,7 @@ int clk_register_clkdev(struct clk *clk, const char *con_id, * those. This is to permit this function to be called immediately * after clk_register(). */ -int clk_register_clkdevs(struct clk *clk, struct clk_lookup *cl, size_t num) +int clk_register_clkdevs(clk_core_t *clk, struct clk_lookup *cl, size_t num) { unsigned i; diff --git a/include/linux/clk-private.h b/include/linux/clk-private.h index efbf70b..2c1ece9 100644 --- a/include/linux/clk-private.h +++ b/include/linux/clk-private.h @@ -28,20 +28,20 @@ struct module; -struct clk { +struct clk_core { const char *name; const struct clk_ops *ops; struct clk_hw *hw; struct module *owner; - struct clk *parent; + struct clk_core *parent; const char **parent_names; - struct clk **parents; + struct clk_core **parents; u8 num_parents; u8 new_parent_index; unsigned long rate; unsigned long new_rate; - struct clk *new_parent; - struct clk *new_child; + struct clk_core *new_parent; + struct clk_core *new_child; unsigned long flags; unsigned int enable_count; unsigned int prepare_count; @@ -55,6 +55,10 @@ struct clk { struct kref ref; }; +struct clk { + struct clk_core *core; +}; + /* * DOC: Basic clock implementations common to many platforms * @@ -66,7 +70,7 @@ struct clk { #define DEFINE_CLK(_name, _ops, _flags, _parent_names, \ _parents) \ - static struct clk _name = { \ + static struct clk_core _name = { \ .name = #_name, \ .ops = &_ops, \ .hw = &_name##_hw.hw, \ @@ -78,7 +82,7 @@ struct clk { #define DEFINE_CLK_FIXED_RATE(_name, _flags, _rate, \ _fixed_rate_flags) \ - static struct clk _name; \ + static struct clk_core _name; \ static const char *_name##_parent_names[] = {}; \ static struct clk_fixed_rate _name##_hw = { \ .hw = { \ @@ -93,11 +97,11 @@ struct clk { #define DEFINE_CLK_GATE(_name, _parent_name, _parent_ptr, \ _flags, _reg, _bit_idx, \ _gate_flags, _lock) \ - static struct clk _name; \ + static struct clk_core _name; \ static const char *_name##_parent_names[] = { \ _parent_name, \ }; \ - static struct clk *_name##_parents[] = { \ + static struct clk_core *_name##_parents[] = { \ _parent_ptr, \ }; \ static struct clk_gate _name##_hw = { \ @@ -115,11 +119,11 @@ struct clk { #define _DEFINE_CLK_DIVIDER(_name, _parent_name, _parent_ptr, \ _flags, _reg, _shift, _width, \ _divider_flags, _table, _lock) \ - static struct clk _name; \ + static struct clk_core _name; \ static const char *_name##_parent_names[] = { \ _parent_name, \ }; \ - static struct clk *_name##_parents[] = { \ + static struct clk_core *_name##_parents[] = { \ _parent_ptr, \ }; \ static struct clk_divider _name##_hw = { \ @@ -154,7 +158,7 @@ struct clk { #define DEFINE_CLK_MUX(_name, _parent_names, _parents, _flags, \ _reg, _shift, _width, \ _mux_flags, _lock) \ - static struct clk _name; \ + static struct clk_core _name; \ static struct clk_mux _name##_hw = { \ .hw = { \ .clk = &_name, \ @@ -171,11 +175,11 @@ struct clk { #define DEFINE_CLK_FIXED_FACTOR(_name, _parent_name, \ _parent_ptr, _flags, \ _mult, _div) \ - static struct clk _name; \ + static struct clk_core _name; \ static const char *_name##_parent_names[] = { \ _parent_name, \ }; \ - static struct clk *_name##_parents[] = { \ + static struct clk_core *_name##_parents[] = { \ _parent_ptr, \ }; \ static struct clk_fixed_factor _name##_hw = { \ @@ -196,7 +200,7 @@ struct clk { * Initializes the lists in struct clk, queries the hardware for the * parent and rate and sets them both. * - * Any struct clk passed into __clk_init must have the following members + * Any struct clk_core passed into __clk_init must have the following members * populated: * .name * .ops @@ -210,9 +214,9 @@ struct clk { * * Returns 0 on success, otherwise an error code. */ -int __clk_init(struct device *dev, struct clk *clk); +int __clk_init(struct device *dev, struct clk_core *clk); -struct clk *__clk_register(struct device *dev, struct clk_hw *hw); +struct clk_core *__clk_register(struct device *dev, struct clk_hw *hw); #endif /* CONFIG_COMMON_CLK */ #endif /* CLK_PRIVATE_H */ diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 99b906f..edf1beb 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -16,35 +16,8 @@ #ifdef CONFIG_COMMON_CLK -/* Temporarily map the to-be-added API to the old API, just so stuff compiles */ -#define clk_core clk - -#define __clk_create_clk - -#define clk_provider_get clk_get -#define clk_provider_get_sys clk_get_sys -#define devm_clk_provider_get devm_clk_get -#define of_clk_provider_get of_clk_get -#define of_clk_provider_get_by_name of_clk_get_by_name - -#define clk_provider_set_rate clk_set_rate -#define clk_provider_get_rate clk_get_rate -#define clk_provider_round_rate clk_round_rate -#define clk_provider_set_parent clk_set_parent -#define clk_provider_get_parent clk_get_parent -#define clk_provider_prepare clk_prepare -#define clk_provider_unprepare clk_unprepare -#define clk_provider_enable clk_enable -#define clk_provider_disable clk_disable -#define clk_provider_prepare_enable clk_prepare_enable -#define clk_provider_disable_unprepare clk_unprepare -#define clk_provider_notifier_register clk_notifier_register -#define clk_provider_notifier_unregister clk_notifier_unregister - -#define clk_get_name __clk_get_name - /* - * flags used across common struct clk. these flags should only affect the + * flags used across common struct clk_core. these flags should only affect the * top-level framework. custom flags for dealing with hardware specifics * belong in struct clk_foo */ @@ -194,7 +167,7 @@ struct clk_ops { unsigned long *parent_rate); long (*determine_rate)(struct clk_hw *hw, unsigned long rate, unsigned long *best_parent_rate, - struct clk **best_parent_clk); + struct clk_core **best_parent_clk); int (*set_parent)(struct clk_hw *hw, u8 index); u8 (*get_parent)(struct clk_hw *hw); int (*set_rate)(struct clk_hw *hw, unsigned long rate, @@ -227,19 +200,19 @@ struct clk_init_data { }; /** - * struct clk_hw - handle for traversing from a struct clk to its corresponding + * struct clk_hw - handle for traversing from a struct clk_core to its corresponding * hardware-specific structure. struct clk_hw should be declared within struct - * clk_foo and then referenced by the struct clk instance that uses struct + * clk_foo and then referenced by the struct clk_core instance that uses struct * clk_foo's clk_ops * - * @clk: pointer to the struct clk instance that points back to this struct + * @clk: pointer to the struct clk_core instance that points back to this struct * clk_hw instance * * @init: pointer to struct clk_init_data that contains the init data shared * with the common clock framework. */ struct clk_hw { - struct clk *clk; + struct clk_core *clk; const struct clk_init_data *init; }; @@ -265,10 +238,10 @@ struct clk_fixed_rate { }; extern const struct clk_ops clk_fixed_rate_ops; -struct clk *clk_register_fixed_rate(struct device *dev, const char *name, +struct clk_core *clk_register_fixed_rate(struct device *dev, const char *name, const char *parent_name, unsigned long flags, unsigned long fixed_rate); -struct clk *clk_register_fixed_rate_with_accuracy(struct device *dev, +struct clk_core *clk_register_fixed_rate_with_accuracy(struct device *dev, const char *name, const char *parent_name, unsigned long flags, unsigned long fixed_rate, unsigned long fixed_accuracy); @@ -306,7 +279,7 @@ struct clk_gate { #define CLK_GATE_HIWORD_MASK BIT(1) extern const struct clk_ops clk_gate_ops; -struct clk *clk_register_gate(struct device *dev, const char *name, +struct clk_core *clk_register_gate(struct device *dev, const char *name, const char *parent_name, unsigned long flags, void __iomem *reg, u8 bit_idx, u8 clk_gate_flags, spinlock_t *lock); @@ -369,11 +342,11 @@ struct clk_divider { extern const struct clk_ops clk_divider_ops; extern const struct clk_ops clk_divider_ro_ops; -struct clk *clk_register_divider(struct device *dev, const char *name, +struct clk_core *clk_register_divider(struct device *dev, const char *name, const char *parent_name, unsigned long flags, void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags, spinlock_t *lock); -struct clk *clk_register_divider_table(struct device *dev, const char *name, +struct clk_core *clk_register_divider_table(struct device *dev, const char *name, const char *parent_name, unsigned long flags, void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags, const struct clk_div_table *table, @@ -418,12 +391,12 @@ struct clk_mux { extern const struct clk_ops clk_mux_ops; extern const struct clk_ops clk_mux_ro_ops; -struct clk *clk_register_mux(struct device *dev, const char *name, +struct clk_core *clk_register_mux(struct device *dev, const char *name, const char **parent_names, u8 num_parents, unsigned long flags, void __iomem *reg, u8 shift, u8 width, u8 clk_mux_flags, spinlock_t *lock); -struct clk *clk_register_mux_table(struct device *dev, const char *name, +struct clk_core *clk_register_mux_table(struct device *dev, const char *name, const char **parent_names, u8 num_parents, unsigned long flags, void __iomem *reg, u8 shift, u32 mask, u8 clk_mux_flags, u32 *table, spinlock_t *lock); @@ -449,7 +422,7 @@ struct clk_fixed_factor { }; extern struct clk_ops clk_fixed_factor_ops; -struct clk *clk_register_fixed_factor(struct device *dev, const char *name, +struct clk_core *clk_register_fixed_factor(struct device *dev, const char *name, const char *parent_name, unsigned long flags, unsigned int mult, unsigned int div); @@ -479,7 +452,7 @@ struct clk_fractional_divider { }; extern const struct clk_ops clk_fractional_divider_ops; -struct clk *clk_register_fractional_divider(struct device *dev, +struct clk_core *clk_register_fractional_divider(struct device *dev, const char *name, const char *parent_name, unsigned long flags, void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth, u8 clk_divider_flags, spinlock_t *lock); @@ -508,7 +481,7 @@ struct clk_composite { const struct clk_ops *gate_ops; }; -struct clk *clk_register_composite(struct device *dev, const char *name, +struct clk_core *clk_register_composite(struct device *dev, const char *name, const char **parent_names, int num_parents, struct clk_hw *mux_hw, const struct clk_ops *mux_ops, struct clk_hw *rate_hw, const struct clk_ops *rate_ops, @@ -521,49 +494,87 @@ struct clk *clk_register_composite(struct device *dev, const char *name, * @hw: link to hardware-specific clock data * * clk_register is the primary interface for populating the clock tree with new - * clock nodes. It returns a pointer to the newly allocated struct clk which + * clock nodes. It returns a pointer to the newly allocated struct clk_core which * cannot be dereferenced by driver code but may be used in conjuction with the * rest of the clock API. In the event of an error clk_register will return an * error code; drivers must test for an error code after calling clk_register. */ -struct clk *clk_register(struct device *dev, struct clk_hw *hw); -struct clk *devm_clk_register(struct device *dev, struct clk_hw *hw); +struct clk_core *clk_register(struct device *dev, struct clk_hw *hw); +struct clk_core *devm_clk_register(struct device *dev, struct clk_hw *hw); -void clk_unregister(struct clk *clk); -void devm_clk_unregister(struct device *dev, struct clk *clk); +void clk_unregister(struct clk_core *clk); +void devm_clk_unregister(struct device *dev, struct clk_core *clk); /* helper functions */ -const char *__clk_get_name(struct clk *clk); -struct clk_hw *__clk_get_hw(struct clk *clk); -u8 __clk_get_num_parents(struct clk *clk); -struct clk *__clk_get_parent(struct clk *clk); -struct clk *clk_get_parent_by_index(struct clk *clk, u8 index); -unsigned int __clk_get_enable_count(struct clk *clk); -unsigned int __clk_get_prepare_count(struct clk *clk); -unsigned long __clk_get_rate(struct clk *clk); -unsigned long __clk_get_accuracy(struct clk *clk); -unsigned long __clk_get_flags(struct clk *clk); -bool __clk_is_prepared(struct clk *clk); -bool __clk_is_enabled(struct clk *clk); -struct clk *__clk_lookup(const char *name); +const char *__clk_get_name(struct clk_core *clk); +struct clk_hw *__clk_get_hw(struct clk_core *clk); +u8 __clk_get_num_parents(struct clk_core *clk); +struct clk_core *__clk_get_parent(struct clk_core *clk); +struct clk_core *clk_get_parent_by_index(struct clk_core *clk, u8 index); +unsigned int __clk_get_enable_count(struct clk_core *clk); +unsigned int __clk_get_prepare_count(struct clk_core *clk); +unsigned long __clk_get_rate(struct clk_core *clk); +unsigned long __clk_get_accuracy(struct clk_core *clk); +unsigned long __clk_get_flags(struct clk_core *clk); +bool __clk_is_prepared(struct clk_core *clk); +bool __clk_is_enabled(struct clk_core *clk); +struct clk_core *__clk_lookup(const char *name); long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate, unsigned long *best_parent_rate, - struct clk **best_parent_p); + struct clk_core **best_parent_p); + +int clk_provider_prepare(struct clk_core *clk); +void clk_provider_unprepare(struct clk_core *clk); +int clk_provider_enable(struct clk_core *clk); +void clk_provider_disable(struct clk_core *clk); +int clk_provider_set_parent(struct clk_core *clk, struct clk_core *parent); +int clk_provider_set_rate(struct clk_core *clk, unsigned long rate); +struct clk_core *clk_provider_get_parent(struct clk_core *clk); +unsigned long clk_provider_get_rate(struct clk_core *clk); +long clk_provider_round_rate(struct clk_core *clk, unsigned long rate); +struct clk_core *clk_provider_get_sys(const char *dev_id, const char *con_id); +struct clk_core *clk_provider_get(struct device *dev, const char *con_id); +struct clk_core *devm_clk_provider_get(struct device *dev, const char *id); +int clk_provider_notifier_register(struct clk_core *clk, struct notifier_block *nb); +int clk_provider_notifier_unregister(struct clk_core *clk, struct notifier_block *nb); +struct clk_core *clk_to_clk_core(struct clk *clk); + +/* clk_provider_prepare_enable helps cases using clk_enable in non-atomic context. */ +static inline int clk_provider_prepare_enable(struct clk_core *clk) +{ + int ret; + + ret = clk_provider_prepare(clk); + if (ret) + return ret; + ret = clk_provider_enable(clk); + if (ret) + clk_provider_unprepare(clk); + + return ret; +} + +/* clk_provider_disable_unprepare helps cases using clk_disable in non-atomic context. */ +static inline void clk_provider_disable_unprepare(struct clk_core *clk) +{ + clk_provider_disable(clk); + clk_provider_unprepare(clk); +} /* * FIXME clock api without lock protection */ -int __clk_prepare(struct clk *clk); -void __clk_unprepare(struct clk *clk); -void __clk_reparent(struct clk *clk, struct clk *new_parent); -unsigned long __clk_round_rate(struct clk *clk, unsigned long rate); +int __clk_prepare(struct clk_core *clk); +void __clk_unprepare(struct clk_core *clk); +void __clk_reparent(struct clk_core *clk, struct clk_core *new_parent); +unsigned long __clk_round_rate(struct clk_core *clk, unsigned long rate); struct of_device_id; typedef void (*of_clk_init_cb_t)(struct device_node *); struct clk_onecell_data { - struct clk **clks; + struct clk_core **clks; unsigned int clk_num; }; @@ -573,22 +584,23 @@ extern struct of_device_id __clk_of_table; #ifdef CONFIG_OF int of_clk_add_provider(struct device_node *np, - struct clk *(*clk_src_get)(struct of_phandle_args *args, + struct clk_core *(*clk_src_get)(struct of_phandle_args *args, void *data), void *data); void of_clk_del_provider(struct device_node *np); -struct clk *of_clk_src_simple_get(struct of_phandle_args *clkspec, +struct clk_core *of_clk_src_simple_get(struct of_phandle_args *clkspec, void *data); -struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data); +struct clk_core *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data); int of_clk_get_parent_count(struct device_node *np); const char *of_clk_get_parent_name(struct device_node *np, int index); +struct clk_core *of_clk_provider_get(struct device_node *np, int index); void of_clk_init(const struct of_device_id *matches); #else /* !CONFIG_OF */ static inline int of_clk_add_provider(struct device_node *np, - struct clk *(*clk_src_get)(struct of_phandle_args *args, + struct clk_core *(*clk_src_get)(struct of_phandle_args *args, void *data), void *data) { @@ -596,12 +608,12 @@ static inline int of_clk_add_provider(struct device_node *np, } #define of_clk_del_provider(np) \ { while (0); } -static inline struct clk *of_clk_src_simple_get( +static inline struct clk_core *of_clk_src_simple_get( struct of_phandle_args *clkspec, void *data) { return ERR_PTR(-ENOENT); } -static inline struct clk *of_clk_src_onecell_get( +static inline struct clk_core *of_clk_src_onecell_get( struct of_phandle_args *clkspec, void *data) { return ERR_PTR(-ENOENT); @@ -611,6 +623,10 @@ static inline const char *of_clk_get_parent_name(struct device_node *np, { return NULL; } +static inline struct clk_core *of_clk_provider_get(struct device_node *np, int index) +{ + return NULL; +} #define of_clk_init(matches) \ { while (0); } #endif /* CONFIG_OF */ @@ -647,7 +663,7 @@ static inline void clk_writel(u32 val, u32 __iomem *reg) #endif /* platform dependent I/O accessors */ #ifdef CONFIG_DEBUG_FS -struct dentry *clk_debugfs_add_file(struct clk *clk, char *name, umode_t mode, +struct dentry *clk_debugfs_add_file(struct clk_core *clk, char *name, umode_t mode, void *data, const struct file_operations *fops); #endif diff --git a/include/linux/clk.h b/include/linux/clk.h index fb5e097..f46a2eb 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -22,6 +22,8 @@ struct clk; #ifdef CONFIG_COMMON_CLK +struct clk_core; + /** * DOC: clk notifier callback types * @@ -56,7 +58,7 @@ struct clk; * @notifier_head. */ struct clk_notifier { - struct clk *clk; + struct clk_core *clk; struct srcu_notifier_head notifier_head; struct list_head node; }; @@ -73,7 +75,7 @@ struct clk_notifier { * current rate (this was done to optimize the implementation). */ struct clk_notifier_data { - struct clk *clk; + struct clk_core *clk; unsigned long old_rate; unsigned long new_rate; }; @@ -307,6 +309,14 @@ struct clk *clk_get_parent(struct clk *clk); */ struct clk *clk_get_sys(const char *dev_id, const char *con_id); +/** + * clk_get_name - get a clock's name + * @clk: clock source + * + * Returns the name of the provided clock. + */ +const char *clk_get_name(struct clk *clk); + #else /* !CONFIG_HAVE_CLK */ static inline struct clk *clk_get(struct device *dev, const char *id) @@ -398,7 +408,8 @@ struct of_phandle_args; #if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK) struct clk *of_clk_get(struct device_node *np, int index); struct clk *of_clk_get_by_name(struct device_node *np, const char *name); -struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec); +struct clk_core *of_clk_provider_get_by_name(struct device_node *np, const char *name); +struct clk_core *of_clk_get_from_provider(struct of_phandle_args *clkspec); #else static inline struct clk *of_clk_get(struct device_node *np, int index) { @@ -409,6 +420,21 @@ static inline struct clk *of_clk_get_by_name(struct device_node *np, { return ERR_PTR(-ENOENT); } + +#if defined(CONFIG_COMMON_CLK) +static inline struct clk_core *of_clk_provider_get_by_name(struct device_node *np, + const char *name) +{ + return ERR_PTR(-ENOENT); +} +#else +static inline struct clk *of_clk_provider_get_by_name(struct device_node *np, + const char *name) +{ + return ERR_PTR(-ENOENT); +} +#endif /* CONFIG_COMMON_CLK */ + #endif #endif diff --git a/include/linux/clkdev.h b/include/linux/clkdev.h index 94bad77..a6c5d67 100644 --- a/include/linux/clkdev.h +++ b/include/linux/clkdev.h @@ -17,11 +17,23 @@ struct clk; struct device; +/* + * To avoid a mass-rename of all non-common clock implementations (spread out + * in arch-specific code), we let them use struct clk for both the internal and + * external view. + */ +#ifdef CONFIG_COMMON_CLK +struct clk_core; +#define clk_core_t struct clk_core +#else +#define clk_core_t struct clk +#endif + struct clk_lookup { struct list_head node; const char *dev_id; const char *con_id; - struct clk *clk; + clk_core_t *clk; }; #define CLKDEV_INIT(d, n, c) \ @@ -31,7 +43,7 @@ struct clk_lookup { .clk = c, \ } -struct clk_lookup *clkdev_alloc(struct clk *clk, const char *con_id, +struct clk_lookup *clkdev_alloc(clk_core_t *clk, const char *con_id, const char *dev_fmt, ...); void clkdev_add(struct clk_lookup *cl); @@ -40,12 +52,12 @@ void clkdev_drop(struct clk_lookup *cl); void clkdev_add_table(struct clk_lookup *, size_t); int clk_add_alias(const char *, const char *, char *, struct device *); -int clk_register_clkdev(struct clk *, const char *, const char *, ...); -int clk_register_clkdevs(struct clk *, struct clk_lookup *, size_t); +int clk_register_clkdev(clk_core_t *, const char *, const char *, ...); +int clk_register_clkdevs(clk_core_t *, struct clk_lookup *, size_t); #ifdef CONFIG_COMMON_CLK -int __clk_get(struct clk *clk); -void __clk_put(struct clk *clk); +int __clk_get(struct clk_core *clk); +void __clk_put(struct clk_core *clk); #endif #endif