[PATCH 02/11] clk: qcom: dispcc-sm8250: use special function for Lucid 5LPE PLL

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

According to msm-5.10 the lucid 5lpe PLLs have require slightly
different configuration that trion / lucid PLLs, it doesn't set
PLL_UPDATE_BYPASS bit. Add corresponding function and use it for the
display clock controller on Qualcomm SM8350 platform.

Fixes: 205737fe3345 ("clk: qcom: add support for SM8350 DISPCC")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/clk/qcom/clk-alpha-pll.c | 52 ++++++++++++++++++++++++++++++++++++++++
 drivers/clk/qcom/clk-alpha-pll.h |  2 ++
 drivers/clk/qcom/dispcc-sm8250.c |  9 +++++--
 3 files changed, 61 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index d87314042528..d0b911499cf9 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -1831,6 +1831,58 @@ const struct clk_ops clk_alpha_pll_agera_ops = {
 };
 EXPORT_SYMBOL_GPL(clk_alpha_pll_agera_ops);
 
+/**
+ * clk_lucid_5lpe_pll_configure - configure the lucid 5lpe pll
+ *
+ * @pll: clk alpha pll
+ * @regmap: register map
+ * @config: configuration to apply for pll
+ */
+void clk_lucid_5lpe_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
+				  const struct alpha_pll_config *config)
+{
+	/*
+	 * If the bootloader left the PLL enabled it's likely that there are
+	 * RCGs that will lock up if we disable the PLL below.
+	 */
+	if (trion_pll_is_enabled(pll, regmap)) {
+		pr_debug("Lucid 5LPE PLL is already enabled, skipping configuration\n");
+		return;
+	}
+
+	clk_alpha_pll_write_config(regmap, PLL_L_VAL(pll), config->l);
+	regmap_write(regmap, PLL_CAL_L_VAL(pll), TRION_PLL_CAL_VAL);
+	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_USER_CTL_U1(pll),
+					config->user_ctl_hi1_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 OFF */
+	regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY);
+
+	/* Place the PLL in STANDBY mode */
+	regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N);
+}
+EXPORT_SYMBOL_GPL(clk_lucid_5lpe_pll_configure);
+
 static int alpha_pll_lucid_5lpe_enable(struct clk_hw *hw)
 {
 	struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h
index df8f0fe15531..e2cf5c7e501d 100644
--- a/drivers/clk/qcom/clk-alpha-pll.h
+++ b/drivers/clk/qcom/clk-alpha-pll.h
@@ -208,6 +208,8 @@ 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_5lpe_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);
 void clk_lucid_ole_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
diff --git a/drivers/clk/qcom/dispcc-sm8250.c b/drivers/clk/qcom/dispcc-sm8250.c
index eb78cd5439d0..884bbd3fb305 100644
--- a/drivers/clk/qcom/dispcc-sm8250.c
+++ b/drivers/clk/qcom/dispcc-sm8250.c
@@ -1360,8 +1360,13 @@ static int disp_cc_sm8250_probe(struct platform_device *pdev)
 		disp_cc_sm8250_clocks[DISP_CC_MDSS_EDP_GTC_CLK_SRC] = NULL;
 	}
 
-	clk_lucid_pll_configure(&disp_cc_pll0, regmap, &disp_cc_pll0_config);
-	clk_lucid_pll_configure(&disp_cc_pll1, regmap, &disp_cc_pll1_config);
+	if (of_device_is_compatible(pdev->dev.of_node, "qcom,sm8350-dispcc")) {
+		clk_lucid_5lpe_pll_configure(&disp_cc_pll0, regmap, &disp_cc_pll0_config);
+		clk_lucid_5lpe_pll_configure(&disp_cc_pll1, regmap, &disp_cc_pll1_config);
+	} else {
+		clk_lucid_pll_configure(&disp_cc_pll0, regmap, &disp_cc_pll0_config);
+		clk_lucid_pll_configure(&disp_cc_pll1, regmap, &disp_cc_pll1_config);
+	}
 
 	/* Enable clock gating for MDP clocks */
 	regmap_update_bits(regmap, 0x8000, 0x10, 0x10);

-- 
2.39.2