clk: stm32mp13: use platform device APIs

Convert devm_platform_ioremap_resource() and remove unnecessary
dependency check with SCMI clock driver.

Signed-off-by: Gabriel Fernandez <gabriel.fernandez@foss.st.com>
Link: https://lore.kernel.org/r/20240411092453.243633-2-gabriel.fernandez@foss.st.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Author: Gabriel-Fernandz

drivers/clk/stm32/clk-stm32-core.c

@@ -25,7 +25,6 @@ static int stm32_rcc_clock_init(struct device *dev,
 {
 	const struct stm32_rcc_match_data *data = match->data;
 	struct clk_hw_onecell_data *clk_data = data->hw_clks;
-	struct device_node *np = dev_of_node(dev);
 	struct clk_hw **hws;
 	int n, max_binding;
 
@@ -64,7 +63,7 @@ static int stm32_rcc_clock_init(struct device *dev,
 			hws[cfg_clock->id] = hw;
 	}
 
-	return of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
+	return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, clk_data);
 }
 
 int stm32_rcc_init(struct device *dev, const struct of_device_id *match_data,
@@ -638,7 +637,7 @@ struct clk_hw *clk_stm32_mux_register(struct device *dev,
 	mux->lock = lock;
 	mux->clock_data = data->clock_data;
 
-	err = clk_hw_register(dev, hw);
+	err = devm_clk_hw_register(dev, hw);
 	if (err)
 		return ERR_PTR(err);
 
@@ -659,7 +658,7 @@ struct clk_hw *clk_stm32_gate_register(struct device *dev,
 	gate->lock = lock;
 	gate->clock_data = data->clock_data;
 
-	err = clk_hw_register(dev, hw);
+	err = devm_clk_hw_register(dev, hw);
 	if (err)
 		return ERR_PTR(err);
 
@@ -680,7 +679,7 @@ struct clk_hw *clk_stm32_div_register(struct device *dev,
 	div->lock = lock;
 	div->clock_data = data->clock_data;
 
-	err = clk_hw_register(dev, hw);
+	err = devm_clk_hw_register(dev, hw);
 	if (err)
 		return ERR_PTR(err);
 
@@ -701,7 +700,7 @@ struct clk_hw *clk_stm32_composite_register(struct device *dev,
 	composite->lock = lock;
 	composite->clock_data = data->clock_data;
 
-	err = clk_hw_register(dev, hw);
+	err = devm_clk_hw_register(dev, hw);
 	if (err)
 		return ERR_PTR(err);
 

drivers/clk/stm32/clk-stm32mp13.c

@@ -1536,77 +1536,16 @@ static const struct of_device_id stm32mp13_match_data[] = {
 };
 MODULE_DEVICE_TABLE(of, stm32mp13_match_data);
 
-static int stm32mp1_rcc_init(struct device *dev)
-{
-	void __iomem *rcc_base;
-	int ret = -ENOMEM;
-
-	rcc_base = of_iomap(dev_of_node(dev), 0);
-	if (!rcc_base) {
-		dev_err(dev, "%pOFn: unable to map resource", dev_of_node(dev));
-		goto out;
-	}
-
-	ret = stm32_rcc_init(dev, stm32mp13_match_data, rcc_base);
-out:
-	if (ret) {
-		if (rcc_base)
-			iounmap(rcc_base);
-
-		of_node_put(dev_of_node(dev));
-	}
-
-	return ret;
-}
-
-static int get_clock_deps(struct device *dev)
-{
-	static const char * const clock_deps_name[] = {
-		"hsi", "hse", "csi", "lsi", "lse",
-	};
-	size_t deps_size = sizeof(struct clk *) * ARRAY_SIZE(clock_deps_name);
-	struct clk **clk_deps;
-	int i;
-
-	clk_deps = devm_kzalloc(dev, deps_size, GFP_KERNEL);
-	if (!clk_deps)
-		return -ENOMEM;
-
-	for (i = 0; i < ARRAY_SIZE(clock_deps_name); i++) {
-		struct clk *clk = of_clk_get_by_name(dev_of_node(dev),
-						     clock_deps_name[i]);
-
-		if (IS_ERR(clk)) {
-			if (PTR_ERR(clk) != -EINVAL && PTR_ERR(clk) != -ENOENT)
-				return PTR_ERR(clk);
-		} else {
-			/* Device gets a reference count on the clock */
-			clk_deps[i] = devm_clk_get(dev, __clk_get_name(clk));
-			clk_put(clk);
-		}
-	}
-
-	return 0;
-}
-
 static int stm32mp1_rcc_clocks_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	int ret = get_clock_deps(dev);
+	void __iomem *base;
 
-	if (!ret)
-		ret = stm32mp1_rcc_init(dev);
-
-	return ret;
-}
-
-static void stm32mp1_rcc_clocks_remove(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *child, *np = dev_of_node(dev);
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (WARN_ON(IS_ERR(base)))
+		return PTR_ERR(base);
 
-	for_each_available_child_of_node(np, child)
-		of_clk_del_provider(child);
+	return stm32_rcc_init(dev, stm32mp13_match_data, base);
 }
 
 static struct platform_driver stm32mp13_rcc_clocks_driver = {
@@ -1615,7 +1554,6 @@ static struct platform_driver stm32mp13_rcc_clocks_driver = {
 		.of_match_table = stm32mp13_match_data,
 	},
 	.probe = stm32mp1_rcc_clocks_probe,
-	.remove_new = stm32mp1_rcc_clocks_remove,
 };
 
 static int __init stm32mp13_clocks_init(void)