[PATCH v9 6/7] clk: qcom: clk-alpha-pll: add Rivian EVO PLL configuration interfaces

From: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Andy Gross <agross@kernel.org>, Stephen Boyd <sboyd@kernel.org>,
	Michael Turquette <mturquette@baylibre.com>,
	linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org
Subject: [PATCH v9 6/7] clk: qcom: clk-alpha-pll: add Rivian EVO PLL configuration interfaces
Date: Thu, 30 Jun 2022 11:18:28 +0300	[thread overview]
Message-ID: <20220630081828.2554088-1-vladimir.zapolskiy@linaro.org> (raw)
In-Reply-To: <20220630081742.2554006-1-vladimir.zapolskiy@linaro.org>

Add and export Rivian EVO PLL configuration and control functions to
clock controller drivers.

Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
---
Changes from v8 to v9:
* none.

Changes from v7 to v8:
* Corrected a comment and added a local variable to improve readability.

Changes from v1 to v7:
* none.

 drivers/clk/qcom/clk-alpha-pll.c | 70 ++++++++++++++++++++++++++++++++
 drivers/clk/qcom/clk-alpha-pll.h |  6 +++
 2 files changed, 76 insertions(+)

diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index cdb1035ae3ed..b42684703fbb 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -154,6 +154,18 @@ const u8 clk_alpha_pll_regs[][PLL_OFF_MAX_REGS] = {
 		[PLL_OFF_TEST_CTL_U] = 0x30,
 		[PLL_OFF_TEST_CTL_U1] = 0x34,
 	},
+	[CLK_ALPHA_PLL_TYPE_RIVIAN_EVO] = {
+		[PLL_OFF_OPMODE] = 0x04,
+		[PLL_OFF_STATUS] = 0x0c,
+		[PLL_OFF_L_VAL] = 0x10,
+		[PLL_OFF_USER_CTL] = 0x14,
+		[PLL_OFF_USER_CTL_U] = 0x18,
+		[PLL_OFF_CONFIG_CTL] = 0x1c,
+		[PLL_OFF_CONFIG_CTL_U] = 0x20,
+		[PLL_OFF_CONFIG_CTL_U1] = 0x24,
+		[PLL_OFF_TEST_CTL] = 0x28,
+		[PLL_OFF_TEST_CTL_U] = 0x2c,
+	},
 };
 EXPORT_SYMBOL_GPL(clk_alpha_pll_regs);
 
@@ -2178,3 +2190,61 @@ const struct clk_ops clk_alpha_pll_lucid_evo_ops = {
 	.set_rate = alpha_pll_lucid_5lpe_set_rate,
 };
 EXPORT_SYMBOL_GPL(clk_alpha_pll_lucid_evo_ops);
+
+void clk_rivian_evo_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
+				  const struct alpha_pll_config *config)
+{
+	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_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_L_VAL(pll), config->l);
+	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);
+
+	regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY);
+
+	regmap_update_bits(regmap, PLL_MODE(pll),
+			   PLL_RESET_N | PLL_BYPASSNL | PLL_OUTCTRL,
+			   PLL_RESET_N | PLL_BYPASSNL);
+}
+EXPORT_SYMBOL_GPL(clk_rivian_evo_pll_configure);
+
+static unsigned long clk_rivian_evo_pll_recalc_rate(struct clk_hw *hw,
+						    unsigned long parent_rate)
+{
+	struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+	u32 l;
+
+	regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l);
+
+	return parent_rate * l;
+}
+
+static long clk_rivian_evo_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+					  unsigned long *prate)
+{
+	struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+	unsigned long min_freq, max_freq;
+	u32 l;
+	u64 a;
+
+	rate = alpha_pll_round_rate(rate, *prate, &l, &a, 0);
+	if (!pll->vco_table || alpha_pll_find_vco(pll, rate))
+		return rate;
+
+	min_freq = pll->vco_table[0].min_freq;
+	max_freq = pll->vco_table[pll->num_vco - 1].max_freq;
+
+	return clamp(rate, min_freq, max_freq);
+}
+
+const struct clk_ops clk_alpha_pll_rivian_evo_ops = {
+	.enable = alpha_pll_lucid_5lpe_enable,
+	.disable = alpha_pll_lucid_5lpe_disable,
+	.is_enabled = clk_trion_pll_is_enabled,
+	.recalc_rate = clk_rivian_evo_pll_recalc_rate,
+	.round_rate = clk_rivian_evo_pll_round_rate,
+};
+EXPORT_SYMBOL_GPL(clk_alpha_pll_rivian_evo_ops);
diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h
index 0b7a6859ca2c..447efb82fe59 100644
--- a/drivers/clk/qcom/clk-alpha-pll.h
+++ b/drivers/clk/qcom/clk-alpha-pll.h
@@ -18,6 +18,7 @@ enum {
 	CLK_ALPHA_PLL_TYPE_AGERA,
 	CLK_ALPHA_PLL_TYPE_ZONDA,
 	CLK_ALPHA_PLL_TYPE_LUCID_EVO,
+	CLK_ALPHA_PLL_TYPE_RIVIAN_EVO,
 	CLK_ALPHA_PLL_TYPE_MAX,
 };
 
@@ -157,6 +158,9 @@ 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;
 
+extern const struct clk_ops clk_alpha_pll_rivian_evo_ops;
+#define clk_alpha_pll_postdiv_rivian_evo_ops clk_alpha_pll_postdiv_fabia_ops
+
 void clk_alpha_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
 			     const struct alpha_pll_config *config);
 void clk_fabia_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
@@ -172,5 +176,7 @@ 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);
+void clk_rivian_evo_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
+				  const struct alpha_pll_config *config);
 
 #endif
-- 
2.33.0

