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Thu, 24 Dec 2020 05:17:24 -0600 Received: from DLEE112.ent.ti.com (157.170.170.23) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Thu, 24 Dec 2020 05:17:23 -0600 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE112.ent.ti.com (157.170.170.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Thu, 24 Dec 2020 05:17:23 -0600 Received: from a0393678-ssd.dal.design.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 0BOBGWGF116630; Thu, 24 Dec 2020 05:17:19 -0600 From: Kishon Vijay Abraham I To: Kishon Vijay Abraham I , Vinod Koul , Rob Herring , Nishanth Menon , Philipp Zabel Subject: [PATCH v3 09/15] phy: cadence: sierra: Model reference receiver as clocks (gate clocks) Date: Thu, 24 Dec 2020 16:46:21 +0530 Message-ID: <20201224111627.32590-10-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201224111627.32590-1-kishon@ti.com> References: <20201224111627.32590-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201224_061726_384323_34401FE6 X-CRM114-Status: GOOD ( 23.71 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Sierra has two reference recievers REFRCV and REFRCV1. REFRCV is used to drive reference clock cmn_refclk_m/p to PLL_CMNLC1 and REFRCV1 is used to drive reference clock cmn_refclk1_m/p to PLL_CMNLC. Model these reference receivers as clocks in order for PLL_CMNLC and PLL_CMNLC1 to be able to seamlessly use any of the external reference clocks. Signed-off-by: Kishon Vijay Abraham I --- drivers/phy/cadence/Kconfig | 1 + drivers/phy/cadence/phy-cadence-sierra.c | 209 ++++++++++++++++++++++- 2 files changed, 207 insertions(+), 3 deletions(-) diff --git a/drivers/phy/cadence/Kconfig b/drivers/phy/cadence/Kconfig index 432832bdbd16..23d5382c34ed 100644 --- a/drivers/phy/cadence/Kconfig +++ b/drivers/phy/cadence/Kconfig @@ -24,6 +24,7 @@ config PHY_CADENCE_DPHY config PHY_CADENCE_SIERRA tristate "Cadence Sierra PHY Driver" depends on OF && HAS_IOMEM && RESET_CONTROLLER + depends on COMMON_CLK select GENERIC_PHY help Enable this to support the Cadence Sierra PHY driver diff --git a/drivers/phy/cadence/phy-cadence-sierra.c b/drivers/phy/cadence/phy-cadence-sierra.c index 44c52a0842dc..8b7b2a838f5f 100644 --- a/drivers/phy/cadence/phy-cadence-sierra.c +++ b/drivers/phy/cadence/phy-cadence-sierra.c @@ -7,6 +7,7 @@ * */ #include +#include #include #include #include @@ -31,6 +32,8 @@ #define SIERRA_CMN_PLLLC_BWCAL_MODE1_PREG 0x4F #define SIERRA_CMN_PLLLC_BWCAL_MODE0_PREG 0x50 #define SIERRA_CMN_PLLLC_SS_TIME_STEPSIZE_MODE_PREG 0x62 +#define SIERRA_CMN_REFRCV_PREG 0x98 +#define SIERRA_CMN_REFRCV1_PREG 0xB8 #define SIERRA_LANE_CDB_OFFSET(ln, block_offset, reg_offset) \ ((0x4000 << (block_offset)) + \ @@ -151,6 +154,35 @@ static const struct reg_field phy_pll_cfg_1 = static const struct reg_field pllctrl_lock = REG_FIELD(SIERRA_PLLCTRL_STATUS_PREG, 0, 0); +enum cdns_sierra_cmn_refrcv { + CMN_REFRCV, + CMN_REFRCV1, +}; + +#define SIERRA_NUM_REFRCV 0x2 + +static const struct reg_field cmn_refrcv_refclk_plllc1en_preg[] = { + [CMN_REFRCV] = REG_FIELD(SIERRA_CMN_REFRCV_PREG, 8, 8), + [CMN_REFRCV1] = REG_FIELD(SIERRA_CMN_REFRCV1_PREG, 8, 8), +}; + +static const struct reg_field cmn_refrcv_refclk_termen_preg[] = { + [CMN_REFRCV] = REG_FIELD(SIERRA_CMN_REFRCV_PREG, 0, 0), + [CMN_REFRCV1] = REG_FIELD(SIERRA_CMN_REFRCV1_PREG, 0, 0), +}; + +static char *refrcv_node_name[] = { "refrcv", "refrcv1" }; + +struct cdns_sierra_refrcv { + struct clk_hw hw; + struct regmap_field *plllc1en_field; + struct regmap_field *termen_field; + struct clk_init_data clk_data; +}; + +#define to_cdns_sierra_refrcv(_hw) \ + container_of(_hw, struct cdns_sierra_refrcv, hw) + struct cdns_sierra_inst { struct phy *phy; u32 phy_type; @@ -197,6 +229,8 @@ struct cdns_sierra_phy { struct regmap_field *macro_id_type; struct regmap_field *phy_pll_cfg_1; struct regmap_field *pllctrl_lock[SIERRA_MAX_LANES]; + struct regmap_field *cmn_refrcv_refclk_plllc1en_preg[SIERRA_NUM_REFRCV]; + struct regmap_field *cmn_refrcv_refclk_termen_preg[SIERRA_NUM_REFRCV]; struct clk *clk; struct clk *cmn_refclk_dig_div; struct clk *cmn_refclk1_dig_div; @@ -364,6 +398,146 @@ static const struct phy_ops ops = { .owner = THIS_MODULE, }; +static int cdns_sierra_refrcv_enable(struct clk_hw *hw) +{ + struct cdns_sierra_refrcv *refrcv = to_cdns_sierra_refrcv(hw); + struct regmap_field *plllc1en_field = refrcv->plllc1en_field; + struct regmap_field *termen_field = refrcv->termen_field; + + regmap_field_write(plllc1en_field, 1); + regmap_field_write(termen_field, 1); + + return 0; +} + +static void cdns_sierra_refrcv_disable(struct clk_hw *hw) +{ + struct cdns_sierra_refrcv *refrcv = to_cdns_sierra_refrcv(hw); + struct regmap_field *plllc1en_field = refrcv->plllc1en_field; + struct regmap_field *termen_field = refrcv->termen_field; + + regmap_field_write(plllc1en_field, 0); + regmap_field_write(termen_field, 0); +} + +static int cdns_sierra_refrcv_is_enabled(struct clk_hw *hw) +{ + struct cdns_sierra_refrcv *refrcv = to_cdns_sierra_refrcv(hw); + struct regmap_field *plllc1en_field = refrcv->plllc1en_field; + int val; + + regmap_field_read(plllc1en_field, &val); + + return !!val; +} + +static const struct clk_ops cdns_sierra_refrcv_ops = { + .enable = cdns_sierra_refrcv_enable, + .disable = cdns_sierra_refrcv_disable, + .is_enabled = cdns_sierra_refrcv_is_enabled, +}; + +static int cdns_sierra_refrcv_register(struct cdns_sierra_phy *sp, + struct device_node *node, + struct regmap_field *plllc1en_field, + struct regmap_field *termen_field) +{ + struct cdns_sierra_refrcv *refrcv; + struct device *dev = sp->dev; + struct clk_init_data *init; + unsigned int num_parents; + const char *parent_name; + char clk_name[100]; + struct clk *clk; + int ret; + + refrcv = devm_kzalloc(dev, sizeof(*refrcv), GFP_KERNEL); + if (!refrcv) + return -ENOMEM; + + num_parents = of_clk_get_parent_count(node); + parent_name = of_clk_get_parent_name(node, 0); + + snprintf(clk_name, sizeof(clk_name), "%s_%s", dev_name(dev), + node->name); + + init = &refrcv->clk_data; + + init->ops = &cdns_sierra_refrcv_ops; + init->flags = 0; + init->parent_names = parent_name ? &parent_name : NULL; + init->num_parents = num_parents ? 1 : 0; + init->name = clk_name; + + refrcv->plllc1en_field = plllc1en_field; + refrcv->termen_field = termen_field; + refrcv->hw.init = init; + + clk = devm_clk_register(dev, &refrcv->hw); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + ret = of_clk_add_provider(node, of_clk_src_simple_get, clk); + if (ret) + dev_err(dev, "Failed to add refrcv clock provider: %s\n", + clk_name); + + return ret; +} + +static void cdns_sierra_refrcv_unregister(struct cdns_sierra_phy *sp, + struct device_node *node) +{ + struct device_node *of_node; + int i; + + for (i = 0; i < SIERRA_NUM_REFRCV; i++) { + of_node = of_get_child_by_name(node, refrcv_node_name[i]); + if (!of_node) + return; + + of_clk_del_provider(of_node); + of_node_put(of_node); + } +} + +static int cdns_sierra_phy_register_refrcv(struct cdns_sierra_phy *sp, + struct device_node *node) +{ + struct regmap_field *plllc1en_field; + struct device_node *of_node = NULL; + struct regmap_field *termen_field; + struct device *dev = sp->dev; + int ret = 0, i; + + for (i = 0; i < SIERRA_NUM_REFRCV; i++) { + of_node = of_get_child_by_name(node, refrcv_node_name[i]); + if (!of_node) + return 0; + + plllc1en_field = sp->cmn_refrcv_refclk_plllc1en_preg[i]; + termen_field = sp->cmn_refrcv_refclk_termen_preg[i]; + + ret = cdns_sierra_refrcv_register(sp, of_node, plllc1en_field, + termen_field); + if (ret) { + dev_err(dev, "Fail to register reference receiver %s\n", + refrcv_node_name[i]); + of_node_put(of_node); + goto err; + } + + of_node_put(of_node); + } + + return 0; + +err: + cdns_sierra_refrcv_unregister(sp, node); + + return ret; +} + static int cdns_sierra_get_optional(struct cdns_sierra_inst *inst, struct device_node *child) { @@ -402,6 +576,7 @@ static int cdns_regfield_init(struct cdns_sierra_phy *sp) { struct device *dev = sp->dev; struct regmap_field *field; + struct reg_field reg_field; struct regmap *regmap; int i; @@ -413,6 +588,24 @@ static int cdns_regfield_init(struct cdns_sierra_phy *sp) } sp->macro_id_type = field; + for (i = 0; i < SIERRA_NUM_REFRCV; i++) { + reg_field = cmn_refrcv_refclk_plllc1en_preg[i]; + field = devm_regmap_field_alloc(dev, regmap, reg_field); + if (IS_ERR(field)) { + dev_err(dev, "REFRCV%d_REFCLK_PLLLC1EN failed\n", i); + return PTR_ERR(field); + } + sp->cmn_refrcv_refclk_plllc1en_preg[i] = field; + + reg_field = cmn_refrcv_refclk_termen_preg[i]; + field = devm_regmap_field_alloc(dev, regmap, reg_field); + if (IS_ERR(field)) { + dev_err(dev, "REFRCV%d_REFCLK_TERMEN failed\n", i); + return PTR_ERR(field); + } + sp->cmn_refrcv_refclk_termen_preg[i] = field; + } + regmap = sp->regmap_phy_config_ctrl; field = devm_regmap_field_alloc(dev, regmap, phy_pll_cfg_1); if (IS_ERR(field)) { @@ -577,17 +770,21 @@ static int cdns_sierra_phy_probe(struct platform_device *pdev) platform_set_drvdata(pdev, sp); - ret = cdns_sierra_phy_get_clocks(sp, dev); + ret = cdns_sierra_phy_register_refrcv(sp, dn); if (ret) return ret; + ret = cdns_sierra_phy_get_clocks(sp, dev); + if (ret) + goto unregister_refrcv; + ret = cdns_sierra_phy_get_resets(sp, dev); if (ret) - return ret; + goto unregister_refrcv; ret = clk_prepare_enable(sp->clk); if (ret) - return ret; + goto unregister_refrcv; /* Enable APB */ reset_control_deassert(sp->apb_rst); @@ -664,12 +861,17 @@ static int cdns_sierra_phy_probe(struct platform_device *pdev) clk_disable: clk_disable_unprepare(sp->clk); reset_control_assert(sp->apb_rst); +unregister_refrcv: + cdns_sierra_refrcv_unregister(sp, dn); + return ret; } static int cdns_sierra_phy_remove(struct platform_device *pdev) { struct cdns_sierra_phy *phy = platform_get_drvdata(pdev); + struct device *dev = &pdev->dev; + struct device_node *dn = dev->of_node; int i; reset_control_assert(phy->phy_rst); @@ -684,6 +886,7 @@ static int cdns_sierra_phy_remove(struct platform_device *pdev) reset_control_assert(phy->phys[i].lnk_rst); reset_control_put(phy->phys[i].lnk_rst); } + cdns_sierra_refrcv_unregister(phy, dn); return 0; }