clk: qcom: common: Add support to configure clk regs in qcom_cc_really_probe

Add support to configure PLLS and clk registers in qcom_cc_really_probe().
This ensures all required power domains are enabled and kept ON by runtime
PM code in qcom_cc_really_probe() before configuring the PLLS or clock
registers.

Add support for qcom_cc_driver_data struct to maintain the clock
controllers PLLs and CBCRs data, and a pointer of it can be stored in
clock descriptor structure. If any clock controller driver requires to
program some additional misc register settings, it can register the
clk_regs_configure() callback in the driver data.

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Jagadeesh Kona <quic_jkona@quicinc.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250530-videocc-pll-multi-pd-voting-v5-6-02303b3a582d@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

2 files changed, 53 insertions, 0 deletions

diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c
index 9cbf1c5296da..b3838d885db2 100644
--- a/drivers/clk/qcom/common.c
+++ b/drivers/clk/qcom/common.c
@@ -14,6 +14,8 @@
 #include <linux/of.h>
 
 #include "common.h"
+#include "clk-alpha-pll.h"
+#include "clk-branch.h"
 #include "clk-rcg.h"
 #include "clk-regmap.h"
 #include "reset.h"
@@ -285,6 +287,40 @@ static int qcom_cc_icc_register(struct device *dev,
 						     desc->num_icc_hws, icd);
 }
 
+static int qcom_cc_clk_pll_configure(const struct qcom_cc_driver_data *data,
+				     struct regmap *regmap)
+{
+	const struct clk_init_data *init;
+	struct clk_alpha_pll *pll;
+	int i;
+
+	for (i = 0; i < data->num_alpha_plls; i++) {
+		pll = data->alpha_plls[i];
+		init = pll->clkr.hw.init;
+
+		if (!pll->config || !pll->regs) {
+			pr_err("%s: missing pll config or regs\n", init->name);
+			return -EINVAL;
+		}
+
+		qcom_clk_alpha_pll_configure(pll, regmap);
+	}
+
+	return 0;
+}
+
+static void qcom_cc_clk_regs_configure(struct device *dev, const struct qcom_cc_driver_data *data,
+				       struct regmap *regmap)
+{
+	int i;
+
+	for (i = 0; i < data->num_clk_cbcrs; i++)
+		qcom_branch_set_clk_en(regmap, data->clk_cbcrs[i]);
+
+	if (data->clk_regs_configure)
+		data->clk_regs_configure(dev, regmap);
+}
+
 int qcom_cc_really_probe(struct device *dev,
 			 const struct qcom_cc_desc *desc, struct regmap *regmap)
 {
@@ -315,6 +351,14 @@ int qcom_cc_really_probe(struct device *dev,
 			return ret;
 	}
 
+	if (desc->driver_data) {
+		ret = qcom_cc_clk_pll_configure(desc->driver_data, regmap);
+		if (ret)
+			goto put_rpm;
+
+		qcom_cc_clk_regs_configure(dev, desc->driver_data, regmap);
+	}
+
 	reset = &cc->reset;
 	reset->rcdev.of_node = dev->of_node;
 	reset->rcdev.ops = &qcom_reset_ops;
diff --git a/drivers/clk/qcom/common.h b/drivers/clk/qcom/common.h
index 9c10bc8c197c..0f4b2d40c65c 100644
--- a/drivers/clk/qcom/common.h
+++ b/drivers/clk/qcom/common.h
@@ -25,6 +25,14 @@ struct qcom_icc_hws_data {
 	int clk_id;
 };
 
+struct qcom_cc_driver_data {
+	struct clk_alpha_pll **alpha_plls;
+	size_t num_alpha_plls;
+	u32 *clk_cbcrs;
+	size_t num_clk_cbcrs;
+	void (*clk_regs_configure)(struct device *dev, struct regmap *regmap);
+};
+
 struct qcom_cc_desc {
 	const struct regmap_config *config;
 	struct clk_regmap **clks;
@@ -39,6 +47,7 @@ struct qcom_cc_desc {
 	size_t num_icc_hws;
 	unsigned int icc_first_node_id;
 	bool use_rpm;
+	struct qcom_cc_driver_data *driver_data;
 };
 
 /**