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[80.180.23.57]) by smtp.gmail.com with ESMTPSA id z4-20020a17090655c400b0083ffb81f01esm10765438ejp.136.2022.12.31.02.47.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 31 Dec 2022 02:47:58 -0800 (PST) From: Dario Binacchi To: linux-kernel@vger.kernel.org Cc: tommaso.merciai@amarulasolutions.com, linux-amarula@amarulasolutions.com, Chen-Yu Tsai , jagan@amarulasolutions.com, angelo@amarulasolutions.com, anthony@amarulasolutions.com, michael@amarulasolutions.com, Dario Binacchi , Abel Vesa , Fabio Estevam , Michael Turquette , NXP Linux Team , Pengutronix Kernel Team , Sascha Hauer , Shawn Guo , Stephen Boyd , linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org Subject: [RFC PATCH 06/11] clk: imx: pll14xx: add device tree support Date: Sat, 31 Dec 2022 11:47:31 +0100 Message-Id: <20221231104736.12635-7-dario.binacchi@amarulasolutions.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20221231104736.12635-1-dario.binacchi@amarulasolutions.com> References: <20221231104736.12635-1-dario.binacchi@amarulasolutions.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221231_024759_568281_9EC765BB X-CRM114-Status: GOOD ( 24.78 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The patch, backwards compatible, extends the driver to initialize the clock directly from the device tree. Signed-off-by: Dario Binacchi --- drivers/clk/imx/clk-pll14xx.c | 220 +++++++++++++++++++++++++++------- 1 file changed, 176 insertions(+), 44 deletions(-) diff --git a/drivers/clk/imx/clk-pll14xx.c b/drivers/clk/imx/clk-pll14xx.c index 828336873a98..6503005b885a 100644 --- a/drivers/clk/imx/clk-pll14xx.c +++ b/drivers/clk/imx/clk-pll14xx.c @@ -12,6 +12,10 @@ #include #include #include +#include +#include +#include +#include #include #include @@ -36,7 +40,9 @@ struct clk_pll14xx { struct clk_hw hw; - void __iomem *base; + struct imx_clk_reg gnrl_ctl; + struct imx_clk_reg div_ctl0; + struct imx_clk_reg div_ctl1; enum imx_pll14xx_type type; const struct imx_pll14xx_rate_table *rate_table; int rate_count; @@ -90,6 +96,30 @@ struct imx_pll14xx_clk imx_1416x_pll = { }; EXPORT_SYMBOL_GPL(imx_1416x_pll); +static void imx_pll14xx_writel(u32 val, const struct imx_clk_reg *reg) +{ + if (reg->base) + writel_relaxed(val, reg->base + reg->offset); + else if (reg->regmap) + regmap_write(reg->regmap, reg->offset, val); + else + pr_err("%s: memory address not set\n", __func__); +} + +static u32 imx_pll14xx_readl(const struct imx_clk_reg *reg) +{ + u32 val = 0; + + if (reg->base) + val = readl_relaxed(reg->base + reg->offset); + else if (reg->regmap) + regmap_read(reg->regmap, reg->offset, &val); + else + pr_err("%s: memory address not set\n", __func__); + + return val; +} + static const struct imx_pll14xx_rate_table *imx_get_pll_settings( struct clk_pll14xx *pll, unsigned long rate) { @@ -161,11 +191,11 @@ static void imx_pll14xx_calc_settings(struct clk_pll14xx *pll, unsigned long rat return; } - pll_div_ctl0 = readl_relaxed(pll->base + DIV_CTL0); + pll_div_ctl0 = imx_pll14xx_readl(&pll->div_ctl0); mdiv = FIELD_GET(MDIV_MASK, pll_div_ctl0); pdiv = FIELD_GET(PDIV_MASK, pll_div_ctl0); sdiv = FIELD_GET(SDIV_MASK, pll_div_ctl0); - pll_div_ctl1 = readl_relaxed(pll->base + DIV_CTL1); + pll_div_ctl1 = imx_pll14xx_readl(&pll->div_ctl1); /* Then see if we can get the desired rate by only adjusting kdiv (glitch free) */ rate_min = pll14xx_calc_rate(pll, mdiv, pdiv, sdiv, KDIV_MIN, prate); @@ -249,13 +279,13 @@ static unsigned long clk_pll14xx_recalc_rate(struct clk_hw *hw, struct clk_pll14xx *pll = to_clk_pll14xx(hw); u32 mdiv, pdiv, sdiv, kdiv, pll_div_ctl0, pll_div_ctl1; - pll_div_ctl0 = readl_relaxed(pll->base + DIV_CTL0); + pll_div_ctl0 = imx_pll14xx_readl(&pll->div_ctl0); mdiv = FIELD_GET(MDIV_MASK, pll_div_ctl0); pdiv = FIELD_GET(PDIV_MASK, pll_div_ctl0); sdiv = FIELD_GET(SDIV_MASK, pll_div_ctl0); if (pll->type == PLL_1443X) { - pll_div_ctl1 = readl_relaxed(pll->base + DIV_CTL1); + pll_div_ctl1 = imx_pll14xx_readl(&pll->div_ctl1); kdiv = FIELD_GET(KDIV_MASK, pll_div_ctl1); } else { kdiv = 0; @@ -277,10 +307,22 @@ static inline bool clk_pll14xx_mp_change(const struct imx_pll14xx_rate_table *ra static int clk_pll14xx_wait_lock(struct clk_pll14xx *pll) { + struct imx_clk_reg *reg = &pll->gnrl_ctl; u32 val; - return readl_poll_timeout(pll->base + GNRL_CTL, val, val & LOCK_STATUS, 0, - LOCK_TIMEOUT_US); + if (reg->base) + return readl_poll_timeout(reg->base + reg->offset, val, + val & LOCK_STATUS, 0, + LOCK_TIMEOUT_US); + + if (reg->regmap) + return regmap_read_poll_timeout(reg->regmap, reg->offset, val, + val & LOCK_STATUS, 0, + LOCK_TIMEOUT_US); + + pr_err("%s: memory address not set\n", __func__); + + return -EIO; } static int clk_pll1416x_set_rate(struct clk_hw *hw, unsigned long drate, @@ -298,32 +340,32 @@ static int clk_pll1416x_set_rate(struct clk_hw *hw, unsigned long drate, return -EINVAL; } - tmp = readl_relaxed(pll->base + DIV_CTL0); + tmp = imx_pll14xx_readl(&pll->div_ctl0); if (!clk_pll14xx_mp_change(rate, tmp)) { tmp &= ~SDIV_MASK; tmp |= FIELD_PREP(SDIV_MASK, rate->sdiv); - writel_relaxed(tmp, pll->base + DIV_CTL0); + imx_pll14xx_writel(tmp, &pll->div_ctl0); return 0; } /* Bypass clock and set lock to pll output lock */ - tmp = readl_relaxed(pll->base + GNRL_CTL); + tmp = imx_pll14xx_readl(&pll->gnrl_ctl); tmp |= LOCK_SEL_MASK; - writel_relaxed(tmp, pll->base + GNRL_CTL); + imx_pll14xx_writel(tmp, &pll->gnrl_ctl); /* Enable RST */ tmp &= ~RST_MASK; - writel_relaxed(tmp, pll->base + GNRL_CTL); + imx_pll14xx_writel(tmp, &pll->gnrl_ctl); /* Enable BYPASS */ tmp |= BYPASS_MASK; - writel(tmp, pll->base + GNRL_CTL); + imx_pll14xx_writel(tmp, &pll->gnrl_ctl); div_val = FIELD_PREP(MDIV_MASK, rate->mdiv) | FIELD_PREP(PDIV_MASK, rate->pdiv) | FIELD_PREP(SDIV_MASK, rate->sdiv); - writel_relaxed(div_val, pll->base + DIV_CTL0); + imx_pll14xx_writel(div_val, &pll->div_ctl0); /* * According to SPEC, t3 - t2 need to be greater than @@ -335,7 +377,7 @@ static int clk_pll1416x_set_rate(struct clk_hw *hw, unsigned long drate, /* Disable RST */ tmp |= RST_MASK; - writel_relaxed(tmp, pll->base + GNRL_CTL); + imx_pll14xx_writel(tmp, &pll->gnrl_ctl); /* Wait Lock */ ret = clk_pll14xx_wait_lock(pll); @@ -344,7 +386,7 @@ static int clk_pll1416x_set_rate(struct clk_hw *hw, unsigned long drate, /* Bypass */ tmp &= ~BYPASS_MASK; - writel_relaxed(tmp, pll->base + GNRL_CTL); + imx_pll14xx_writel(tmp, &pll->gnrl_ctl); return 0; } @@ -359,35 +401,35 @@ static int clk_pll1443x_set_rate(struct clk_hw *hw, unsigned long drate, imx_pll14xx_calc_settings(pll, drate, prate, &rate); - div_ctl0 = readl_relaxed(pll->base + DIV_CTL0); + div_ctl0 = imx_pll14xx_readl(&pll->div_ctl0); if (!clk_pll14xx_mp_change(&rate, div_ctl0)) { /* only sdiv and/or kdiv changed - no need to RESET PLL */ div_ctl0 &= ~SDIV_MASK; div_ctl0 |= FIELD_PREP(SDIV_MASK, rate.sdiv); - writel_relaxed(div_ctl0, pll->base + DIV_CTL0); + imx_pll14xx_writel(div_ctl0, &pll->div_ctl0); - writel_relaxed(FIELD_PREP(KDIV_MASK, rate.kdiv), - pll->base + DIV_CTL1); + imx_pll14xx_writel(FIELD_PREP(KDIV_MASK, rate.kdiv), + &pll->div_ctl1); return 0; } /* Enable RST */ - gnrl_ctl = readl_relaxed(pll->base + GNRL_CTL); + gnrl_ctl = imx_pll14xx_readl(&pll->gnrl_ctl); gnrl_ctl &= ~RST_MASK; - writel_relaxed(gnrl_ctl, pll->base + GNRL_CTL); + imx_pll14xx_writel(gnrl_ctl, &pll->gnrl_ctl); /* Enable BYPASS */ gnrl_ctl |= BYPASS_MASK; - writel_relaxed(gnrl_ctl, pll->base + GNRL_CTL); + imx_pll14xx_writel(gnrl_ctl, &pll->gnrl_ctl); div_ctl0 = FIELD_PREP(MDIV_MASK, rate.mdiv) | FIELD_PREP(PDIV_MASK, rate.pdiv) | FIELD_PREP(SDIV_MASK, rate.sdiv); - writel_relaxed(div_ctl0, pll->base + DIV_CTL0); + imx_pll14xx_writel(div_ctl0, &pll->div_ctl0); - writel_relaxed(FIELD_PREP(KDIV_MASK, rate.kdiv), pll->base + DIV_CTL1); + imx_pll14xx_writel(FIELD_PREP(KDIV_MASK, rate.kdiv), &pll->div_ctl1); /* * According to SPEC, t3 - t2 need to be greater than @@ -399,7 +441,7 @@ static int clk_pll1443x_set_rate(struct clk_hw *hw, unsigned long drate, /* Disable RST */ gnrl_ctl |= RST_MASK; - writel_relaxed(gnrl_ctl, pll->base + GNRL_CTL); + imx_pll14xx_writel(gnrl_ctl, &pll->gnrl_ctl); /* Wait Lock*/ ret = clk_pll14xx_wait_lock(pll); @@ -408,7 +450,7 @@ static int clk_pll1443x_set_rate(struct clk_hw *hw, unsigned long drate, /* Bypass */ gnrl_ctl &= ~BYPASS_MASK; - writel_relaxed(gnrl_ctl, pll->base + GNRL_CTL); + imx_pll14xx_writel(gnrl_ctl, &pll->gnrl_ctl); return 0; } @@ -423,20 +465,20 @@ static int clk_pll14xx_prepare(struct clk_hw *hw) * RESETB = 1 from 0, PLL starts its normal * operation after lock time */ - val = readl_relaxed(pll->base + GNRL_CTL); + val = imx_pll14xx_readl(&pll->gnrl_ctl); if (val & RST_MASK) return 0; val |= BYPASS_MASK; - writel_relaxed(val, pll->base + GNRL_CTL); + imx_pll14xx_writel(val, &pll->gnrl_ctl); val |= RST_MASK; - writel_relaxed(val, pll->base + GNRL_CTL); + imx_pll14xx_writel(val, &pll->gnrl_ctl); ret = clk_pll14xx_wait_lock(pll); if (ret) return ret; val &= ~BYPASS_MASK; - writel_relaxed(val, pll->base + GNRL_CTL); + imx_pll14xx_writel(val, &pll->gnrl_ctl); return 0; } @@ -446,7 +488,7 @@ static int clk_pll14xx_is_prepared(struct clk_hw *hw) struct clk_pll14xx *pll = to_clk_pll14xx(hw); u32 val; - val = readl_relaxed(pll->base + GNRL_CTL); + val = imx_pll14xx_readl(&pll->gnrl_ctl); return (val & RST_MASK) ? 1 : 0; } @@ -460,9 +502,9 @@ static void clk_pll14xx_unprepare(struct clk_hw *hw) * Set RST to 0, power down mode is enabled and * every digital block is reset */ - val = readl_relaxed(pll->base + GNRL_CTL); + val = imx_pll14xx_readl(&pll->gnrl_ctl); val &= ~RST_MASK; - writel_relaxed(val, pll->base + GNRL_CTL); + imx_pll14xx_writel(val, &pll->gnrl_ctl); } static const struct clk_ops clk_pll1416x_ops = { @@ -487,13 +529,24 @@ static const struct clk_ops clk_pll1443x_ops = { .set_rate = clk_pll1443x_set_rate, }; -struct clk_hw *imx_dev_clk_hw_pll14xx(struct device *dev, const char *name, - const char *parent_name, void __iomem *base, - const struct imx_pll14xx_clk *pll_clk) +static void imx_clk_hw_unregister_pll14xx(struct clk_hw *hw) { + struct clk_pll14xx *pll = to_clk_pll14xx(hw); + + clk_hw_unregister(hw); + kfree(pll); +} + +static struct clk_hw * +imx_clk_hw_register_pll14xx(struct device_node *node, const char *name, + const char *parent_name, + struct imx_clk_reg *iomap, + const struct imx_pll14xx_clk *pll_clk) +{ + struct clk_parent_data pdata = { .index = 0 }; + struct clk_init_data init = { NULL }; struct clk_pll14xx *pll; struct clk_hw *hw; - struct clk_init_data init; int ret; u32 val; @@ -503,7 +556,8 @@ struct clk_hw *imx_dev_clk_hw_pll14xx(struct device *dev, const char *name, init.name = name; init.flags = pll_clk->flags; - init.parent_names = &parent_name; + init.parent_names = parent_name ? &parent_name : NULL; + init.parent_data = &pdata; init.num_parents = 1; switch (pll_clk->type) { @@ -522,19 +576,24 @@ struct clk_hw *imx_dev_clk_hw_pll14xx(struct device *dev, const char *name, return ERR_PTR(-EINVAL); } - pll->base = base; + memcpy(&pll->gnrl_ctl, iomap, sizeof(*iomap)); + pll->gnrl_ctl.offset += GNRL_CTL; + memcpy(&pll->div_ctl0, iomap, sizeof(*iomap)); + pll->div_ctl0.offset += DIV_CTL0; + memcpy(&pll->div_ctl1, iomap, sizeof(*iomap)); + pll->div_ctl1.offset += DIV_CTL1; + pll->hw.init = &init; pll->type = pll_clk->type; pll->rate_table = pll_clk->rate_table; pll->rate_count = pll_clk->rate_count; - val = readl_relaxed(pll->base + GNRL_CTL); + val = imx_pll14xx_readl(&pll->gnrl_ctl); val &= ~BYPASS_MASK; - writel_relaxed(val, pll->base + GNRL_CTL); + imx_pll14xx_writel(val, &pll->gnrl_ctl); hw = &pll->hw; - - ret = clk_hw_register(dev, hw); + ret = of_clk_hw_register(node, hw); if (ret) { pr_err("failed to register pll %s %d\n", name, ret); kfree(pll); @@ -543,4 +602,77 @@ struct clk_hw *imx_dev_clk_hw_pll14xx(struct device *dev, const char *name, return hw; } + +struct clk_hw *imx_dev_clk_hw_pll14xx(struct device *dev, const char *name, + const char *parent_name, void __iomem *base, + const struct imx_pll14xx_clk *pll_clk) +{ + struct imx_clk_reg iomap = {}; + + iomap.base = base; + return imx_clk_hw_register_pll14xx(dev_of_node(dev), name, parent_name, + &iomap, pll_clk); +} EXPORT_SYMBOL_GPL(imx_dev_clk_hw_pll14xx); + +/** + * of_imx_pll14xx_clk_setup() - Setup function for imx pll14xx clock + * @node: device node for the clock + */ +static void __init of_imx_pll14xx_clk_setup(struct device_node *node) +{ + struct clk_hw *hw; + struct imx_clk_reg iomap = {}; + const char *name = node->name; + const struct imx_pll14xx_clk *pll_clk; + const char *pll_type; + u32 val; + + iomap.regmap = syscon_regmap_lookup_by_phandle(node, "fsl,anatop"); + if (IS_ERR(iomap.regmap)) { + pr_err("missing regmap for %pOFn\n", node); + return; + } + + if (of_property_read_u32_index(node, "fsl,anatop", 1, &val)) { + pr_err("missing register offset for %pOFn\n", node); + return; + } + + iomap.offset = val; + if (of_clk_get_parent_count(node) != 1) { + pr_err("%pOFn must have 1 parent clock\n", node); + return; + } + + of_property_read_string(node, "clock-output-names", &name); + if (of_property_read_string(node, "fsl,type", &pll_type)) { + pr_err("missing 'fsl,type' for %pOFn\n", node); + return; + } + + if (!strcmp(pll_type, "1443x")) { + if (of_property_read_bool(node, "fsl,get-rate-nocache")) + pll_clk = &imx_1443x_dram_pll; + else + pll_clk = &imx_1443x_pll; + } else if (!strcmp(pll_type, "1416x")) { + pll_clk = &imx_1416x_pll; + } else { + pr_err("failed to get pll clock for %pOFn\n", node); + return; + } + + hw = imx_clk_hw_register_pll14xx(node, name, NULL, &iomap, pll_clk); + if (IS_ERR(hw)) + return; + + if (of_clk_add_hw_provider(node, of_clk_hw_simple_get, hw)) { + imx_clk_hw_unregister_pll14xx(hw); + return; + } + + pr_debug("name: %s, offset: 0x%x, pll_type: %s\n", name, iomap.offset, + pll_type); +} +CLK_OF_DECLARE(fsl_pll14xx_clk, "fsl,pll14xx-clock", of_imx_pll14xx_clk_setup);