[PATCH 02/13] clk: en7523: generalize register clocks function

[Christian Marangi]

Generalize register clocks function for Airoha EN7523 and EN7581 clocks
driver. The same logic is applied for both clock hence code can be
reduced and simplified by putting the base_clocks struct in the soc_data
and passing that to a generic register clocks function.

There is always the pattern where the last clock is always the PCIe one.

Signed-off-by: Christian Marangi <ansuelsmth@xxxxxxxxx>
---
 drivers/clk/clk-en7523.c | 130 ++++++++++++++++-----------------------
 1 file changed, 53 insertions(+), 77 deletions(-)

diff --git a/drivers/clk/clk-en7523.c b/drivers/clk/clk-en7523.c
index 314e7450313f..2a74bc8fed24 100644
--- a/drivers/clk/clk-en7523.c
+++ b/drivers/clk/clk-en7523.c
@@ -78,8 +78,10 @@ struct en_rst_data {
 
 struct en_clk_soc_data {
 	u32 num_clocks;
+	const struct en_clk_desc *base_clks;
 	const struct clk_ops pcie_ops;
 	int (*hw_init)(struct platform_device *pdev,
+		       const struct en_clk_soc_data *soc_data,
 		       struct clk_hw_onecell_data *clk_data);
 };
 
@@ -467,6 +469,50 @@ static struct clk_hw *en7523_register_pcie_clk(struct device *dev,
 	return &cg->hw;
 }
 
+static void en75xx_register_clocks(struct device *dev,
+				   const struct en_clk_soc_data *soc_data,
+				   struct clk_hw_onecell_data *clk_data,
+				   struct regmap *map, struct regmap *clk_map)
+{
+	struct clk_hw *hw;
+	u32 rate;
+	int i;
+
+	for (i = 0; i < soc_data->num_clocks - 1; i++) {
+		const struct en_clk_desc *desc = &soc_data->base_clks[i];
+		u32 val, reg = desc->div_reg ? desc->div_reg : desc->base_reg;
+		int err;
+
+		err = regmap_read(map, desc->base_reg, &val);
+		if (err) {
+			pr_err("Failed reading fixed clk rate %s: %d\n",
+			       desc->name, err);
+			continue;
+		}
+		rate = en7523_get_base_rate(desc, val);
+
+		err = regmap_read(map, reg, &val);
+		if (err) {
+			pr_err("Failed reading fixed clk div %s: %d\n",
+			       desc->name, err);
+			continue;
+		}
+		rate /= en7523_get_div(desc, val);
+
+		hw = clk_hw_register_fixed_rate(dev, desc->name, NULL, 0, rate);
+		if (IS_ERR(hw)) {
+			pr_err("Failed to register clk %s: %ld\n",
+			       desc->name, PTR_ERR(hw));
+			continue;
+		}
+
+		clk_data->hws[desc->id] = hw;
+	}
+
+	hw = en7523_register_pcie_clk(dev, clk_map);
+	clk_data->hws[soc_data->num_clocks] = hw;
+}
+
 static int en7581_pci_is_enabled(struct clk_hw *hw)
 {
 	struct en_clk_gate *cg = container_of(hw, struct en_clk_gate, hw);
@@ -504,38 +550,6 @@ static void en7581_pci_disable(struct clk_hw *hw)
 	usleep_range(1000, 2000);
 }
 
-static void en7523_register_clocks(struct device *dev, struct clk_hw_onecell_data *clk_data,
-				   struct regmap *map, struct regmap *clk_map)
-{
-	struct clk_hw *hw;
-	u32 rate;
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(en7523_base_clks); i++) {
-		const struct en_clk_desc *desc = &en7523_base_clks[i];
-		u32 reg = desc->div_reg ? desc->div_reg : desc->base_reg;
-		u32 val;
-
-		regmap_read(map, desc->base_reg, &val);
-
-		rate = en7523_get_base_rate(desc, val);
-		regmap_read(map, reg, &val);
-		rate /= en7523_get_div(desc, val);
-
-		hw = clk_hw_register_fixed_rate(dev, desc->name, NULL, 0, rate);
-		if (IS_ERR(hw)) {
-			pr_err("Failed to register clk %s: %ld\n",
-			       desc->name, PTR_ERR(hw));
-			continue;
-		}
-
-		clk_data->hws[desc->id] = hw;
-	}
-
-	hw = en7523_register_pcie_clk(dev, clk_map);
-	clk_data->hws[EN7523_CLK_PCIE] = hw;
-}
-
 static const struct regmap_config en7523_clk_regmap_config = {
 	.reg_bits = 32,
 	.val_bits = 32,
@@ -543,6 +557,7 @@ static const struct regmap_config en7523_clk_regmap_config = {
 };
 
 static int en7523_clk_hw_init(struct platform_device *pdev,
+			      const struct en_clk_soc_data *soc_data,
 			      struct clk_hw_onecell_data *clk_data)
 {
 	void __iomem *base, *np_base;
@@ -566,53 +581,11 @@ static int en7523_clk_hw_init(struct platform_device *pdev,
 	if (IS_ERR(clk_map))
 		return PTR_ERR(clk_map);
 
-	en7523_register_clocks(&pdev->dev, clk_data, map, clk_map);
+	en75xx_register_clocks(&pdev->dev, soc_data, clk_data, map, clk_map);
 
 	return 0;
 }
 
-static void en7581_register_clocks(struct device *dev, struct clk_hw_onecell_data *clk_data,
-				   struct regmap *map, struct regmap *clk_map)
-{
-	struct clk_hw *hw;
-	u32 rate;
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(en7581_base_clks); i++) {
-		const struct en_clk_desc *desc = &en7581_base_clks[i];
-		u32 val, reg = desc->div_reg ? desc->div_reg : desc->base_reg;
-		int err;
-
-		err = regmap_read(map, desc->base_reg, &val);
-		if (err) {
-			pr_err("Failed reading fixed clk rate %s: %d\n",
-			       desc->name, err);
-			continue;
-		}
-		rate = en7523_get_base_rate(desc, val);
-
-		err = regmap_read(map, reg, &val);
-		if (err) {
-			pr_err("Failed reading fixed clk div %s: %d\n",
-			       desc->name, err);
-			continue;
-		}
-		rate /= en7523_get_div(desc, val);
-
-		hw = clk_hw_register_fixed_rate(dev, desc->name, NULL, 0, rate);
-		if (IS_ERR(hw)) {
-			pr_err("Failed to register clk %s: %ld\n",
-			       desc->name, PTR_ERR(hw));
-			continue;
-		}
-
-		clk_data->hws[desc->id] = hw;
-	}
-
-	hw = en7523_register_pcie_clk(dev, clk_map);
-	clk_data->hws[EN7523_CLK_PCIE] = hw;
-}
-
 static int en7523_reset_update(struct reset_controller_dev *rcdev,
 			       unsigned long id, bool assert)
 {
@@ -689,6 +662,7 @@ static int en7581_reset_register(struct device *dev, struct regmap *map)
 }
 
 static int en7581_clk_hw_init(struct platform_device *pdev,
+			      const struct en_clk_soc_data *soc_data,
 			      struct clk_hw_onecell_data *clk_data)
 {
 	struct regmap *map, *clk_map;
@@ -706,7 +680,7 @@ static int en7581_clk_hw_init(struct platform_device *pdev,
 	if (IS_ERR(clk_map))
 		return PTR_ERR(clk_map);
 
-	en7581_register_clocks(&pdev->dev, clk_data, map, clk_map);
+	en75xx_register_clocks(&pdev->dev, soc_data, clk_data, map, clk_map);
 
 	regmap_clear_bits(clk_map, REG_NP_SCU_SSTR,
 			  REG_PCIE_XSI0_SEL_MASK | REG_PCIE_XSI1_SEL_MASK);
@@ -732,7 +706,7 @@ static int en7523_clk_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	clk_data->num = soc_data->num_clocks;
-	r = soc_data->hw_init(pdev, clk_data);
+	r = soc_data->hw_init(pdev, soc_data, clk_data);
 	if (r)
 		return r;
 
@@ -740,6 +714,7 @@ static int en7523_clk_probe(struct platform_device *pdev)
 }
 
 static const struct en_clk_soc_data en7523_data = {
+	.base_clks = en7523_base_clks,
 	.num_clocks = ARRAY_SIZE(en7523_base_clks) + 1,
 	.pcie_ops = {
 		.is_enabled = en7523_pci_is_enabled,
@@ -750,6 +725,7 @@ static const struct en_clk_soc_data en7523_data = {
 };
 
 static const struct en_clk_soc_data en7581_data = {
+	.base_clks = en7581_base_clks,
 	/* We increment num_clocks by 1 to account for additional PCIe clock */
 	.num_clocks = ARRAY_SIZE(en7581_base_clks) + 1,
 	.pcie_ops = {
-- 
2.48.1