clk: qcom: clk-alpha-pll: add Lucid EVO PLL configuration interfaces

Add controls for Lucid EVO PLL configuration and export control functions
to clock controller drivers, the PLL is used by Qualcomm SM8450 camera
and display clock controllers.
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220701062729.2757893-1-vladimir.zapolskiy@linaro.org

drivers/clk/qcom/clk-alpha-pll.c

@@ -191,8 +191,10 @@ EXPORT_SYMBOL_GPL(clk_alpha_pll_regs);
 #define LUCID_5LPE_ENABLE_VOTE_RUN	BIT(21)
 
 /* LUCID EVO PLL specific settings and offsets */
+#define LUCID_EVO_PCAL_NOT_DONE		BIT(8)
 #define LUCID_EVO_ENABLE_VOTE_RUN       BIT(25)
 #define LUCID_EVO_PLL_L_VAL_MASK        GENMASK(15, 0)
+#define LUCID_EVO_PLL_CAL_L_VAL_SHIFT	16
 
 /* ZONDA PLL specific */
 #define ZONDA_PLL_OUT_MASK	0xf
@@ -1994,6 +1996,32 @@ const struct clk_ops clk_alpha_pll_zonda_ops = {
 };
 EXPORT_SYMBOL_GPL(clk_alpha_pll_zonda_ops);
 
+void clk_lucid_evo_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
+				 const struct alpha_pll_config *config)
+{
+	u32 lval = config->l;
+
+	lval |= TRION_PLL_CAL_VAL << LUCID_EVO_PLL_CAL_L_VAL_SHIFT;
+	clk_alpha_pll_write_config(regmap, PLL_L_VAL(pll), lval);
+	clk_alpha_pll_write_config(regmap, PLL_ALPHA_VAL(pll), config->alpha);
+	clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL(pll), config->config_ctl_val);
+	clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL_U(pll), config->config_ctl_hi_val);
+	clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL_U1(pll), config->config_ctl_hi1_val);
+	clk_alpha_pll_write_config(regmap, PLL_USER_CTL(pll), config->user_ctl_val);
+	clk_alpha_pll_write_config(regmap, PLL_USER_CTL_U(pll), config->user_ctl_hi_val);
+	clk_alpha_pll_write_config(regmap, PLL_TEST_CTL(pll), config->test_ctl_val);
+	clk_alpha_pll_write_config(regmap, PLL_TEST_CTL_U(pll), config->test_ctl_hi_val);
+	clk_alpha_pll_write_config(regmap, PLL_TEST_CTL_U1(pll), config->test_ctl_hi1_val);
+
+	/* Disable PLL output */
+	regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, 0);
+
+	/* Set operation mode to STANDBY and de-assert the reset */
+	regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY);
+	regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N);
+}
+EXPORT_SYMBOL_GPL(clk_lucid_evo_pll_configure);
+
 static int alpha_pll_lucid_evo_enable(struct clk_hw *hw)
 {
 	struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
@@ -2079,6 +2107,31 @@ static void alpha_pll_lucid_evo_disable(struct clk_hw *hw)
 	regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY);
 }
 
+static int alpha_pll_lucid_evo_prepare(struct clk_hw *hw)
+{
+	struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+	struct clk_hw *p;
+	u32 val = 0;
+	int ret;
+
+	/* Return early if calibration is not needed. */
+	regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
+	if (!(val & LUCID_EVO_PCAL_NOT_DONE))
+		return 0;
+
+	p = clk_hw_get_parent(hw);
+	if (!p)
+		return -EINVAL;
+
+	ret = alpha_pll_lucid_evo_enable(hw);
+	if (ret)
+		return ret;
+
+	alpha_pll_lucid_evo_disable(hw);
+
+	return 0;
+}
+
 static unsigned long alpha_pll_lucid_evo_recalc_rate(struct clk_hw *hw,
 						     unsigned long parent_rate)
 {
@@ -2114,3 +2167,14 @@ const struct clk_ops clk_alpha_pll_postdiv_lucid_evo_ops = {
 	.set_rate = clk_lucid_evo_pll_postdiv_set_rate,
 };
 EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_lucid_evo_ops);
+
+const struct clk_ops clk_alpha_pll_lucid_evo_ops = {
+	.prepare = alpha_pll_lucid_evo_prepare,
+	.enable = alpha_pll_lucid_evo_enable,
+	.disable = alpha_pll_lucid_evo_disable,
+	.is_enabled = clk_trion_pll_is_enabled,
+	.recalc_rate = alpha_pll_lucid_evo_recalc_rate,
+	.round_rate = clk_alpha_pll_round_rate,
+	.set_rate = alpha_pll_lucid_5lpe_set_rate,
+};
+EXPORT_SYMBOL_GPL(clk_alpha_pll_lucid_evo_ops);

drivers/clk/qcom/clk-alpha-pll.h

@@ -152,6 +152,8 @@ extern const struct clk_ops clk_alpha_pll_postdiv_lucid_5lpe_ops;
 
 extern const struct clk_ops clk_alpha_pll_zonda_ops;
 #define clk_alpha_pll_postdiv_zonda_ops clk_alpha_pll_postdiv_fabia_ops
+
+extern const struct clk_ops clk_alpha_pll_lucid_evo_ops;
 extern const struct clk_ops clk_alpha_pll_fixed_lucid_evo_ops;
 extern const struct clk_ops clk_alpha_pll_postdiv_lucid_evo_ops;
 
@@ -168,6 +170,7 @@ void clk_agera_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
 
 void clk_zonda_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
 			     const struct alpha_pll_config *config);
-
+void clk_lucid_evo_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
+				 const struct alpha_pll_config *config);
 
 #endif