clk: sunxi-ng: Convert early providers to platform drivers

The PRCM CCU drivers depend on clocks provided by other CCU drivers. For
example, the sun8i-r-ccu driver uses the "pll-periph" clock provided by
the SoC's main CCU.

However, sun8i-r-ccu is an early OF clock provider, and many of the
main CCUs (e.g. sun50i-a64-ccu) use platform drivers. This means that
the consumer clocks will be orphaned until the supplier driver is bound.
This can be avoided by converting the remaining CCUs to use platform
drivers. Then fw_devlink will ensure the drivers are bound in the
optimal order.

The sun5i CCU is the only one which actually needs to be an early clock
provider, because it provides the clock for the system timer. That one
is left alone.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20211119033338.25486-4-samuel@sholland.org

Author: smaeul

drivers/clk/sunxi-ng/Kconfig

@@ -8,7 +8,7 @@ config SUNXI_CCU
 if SUNXI_CCU
 
 config SUNIV_F1C100S_CCU
-	bool "Support for the Allwinner newer F1C100s CCU"
+	tristate "Support for the Allwinner newer F1C100s CCU"
 	default MACH_SUNIV
 	depends on MACH_SUNIV || COMPILE_TEST
 
@@ -33,17 +33,17 @@ config SUN50I_H6_CCU
 	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
 
 config SUN50I_H616_CCU
-	bool "Support for the Allwinner H616 CCU"
+	tristate "Support for the Allwinner H616 CCU"
 	default ARM64 && ARCH_SUNXI
 	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
 
 config SUN50I_H6_R_CCU
-	bool "Support for the Allwinner H6 and H616 PRCM CCU"
+	tristate "Support for the Allwinner H6 and H616 PRCM CCU"
 	default ARM64 && ARCH_SUNXI
 	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
 
 config SUN4I_A10_CCU
-	bool "Support for the Allwinner A10/A20 CCU"
+	tristate "Support for the Allwinner A10/A20 CCU"
 	default MACH_SUN4I
 	default MACH_SUN7I
 	depends on MACH_SUN4I || MACH_SUN7I || COMPILE_TEST
@@ -54,17 +54,17 @@ config SUN5I_CCU
 	depends on MACH_SUN5I || COMPILE_TEST
 
 config SUN6I_A31_CCU
-	bool "Support for the Allwinner A31/A31s CCU"
+	tristate "Support for the Allwinner A31/A31s CCU"
 	default MACH_SUN6I
 	depends on MACH_SUN6I || COMPILE_TEST
 
 config SUN8I_A23_CCU
-	bool "Support for the Allwinner A23 CCU"
+	tristate "Support for the Allwinner A23 CCU"
 	default MACH_SUN8I
 	depends on MACH_SUN8I || COMPILE_TEST
 
 config SUN8I_A33_CCU
-	bool "Support for the Allwinner A33 CCU"
+	tristate "Support for the Allwinner A33 CCU"
 	default MACH_SUN8I
 	depends on MACH_SUN8I || COMPILE_TEST
 
@@ -74,12 +74,12 @@ config SUN8I_A83T_CCU
 	depends on MACH_SUN8I || COMPILE_TEST
 
 config SUN8I_H3_CCU
-	bool "Support for the Allwinner H3 CCU"
+	tristate "Support for the Allwinner H3 CCU"
 	default MACH_SUN8I || (ARM64 && ARCH_SUNXI)
 	depends on MACH_SUN8I || (ARM64 && ARCH_SUNXI) || COMPILE_TEST
 
 config SUN8I_V3S_CCU
-	bool "Support for the Allwinner V3s CCU"
+	tristate "Support for the Allwinner V3s CCU"
 	default MACH_SUN8I
 	depends on MACH_SUN8I || COMPILE_TEST
 
@@ -98,7 +98,7 @@ config SUN9I_A80_CCU
 	depends on MACH_SUN9I || COMPILE_TEST
 
 config SUN8I_R_CCU
-	bool "Support for Allwinner SoCs' PRCM CCUs"
+	tristate "Support for Allwinner SoCs' PRCM CCUs"
 	default MACH_SUN8I || (ARCH_SUNXI && ARM64)
 
 endif

drivers/clk/sunxi-ng/ccu-sun4i-a10.c

@@ -7,7 +7,9 @@
 
 #include <linux/clk-provider.h>
 #include <linux/io.h>
-#include <linux/of_address.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
 
 #include "ccu_common.h"
 #include "ccu_reset.h"
@@ -1425,18 +1427,19 @@ static const struct sunxi_ccu_desc sun7i_a20_ccu_desc = {
 	.num_resets	= ARRAY_SIZE(sunxi_a10_a20_ccu_resets),
 };
 
-static void __init sun4i_ccu_init(struct device_node *node,
-				  const struct sunxi_ccu_desc *desc)
+static int sun4i_a10_ccu_probe(struct platform_device *pdev)
 {
+	const struct sunxi_ccu_desc *desc;
 	void __iomem *reg;
 	u32 val;
 
-	reg = of_io_request_and_map(node, 0, of_node_full_name(node));
-	if (IS_ERR(reg)) {
-		pr_err("%s: Could not map the clock registers\n",
-		       of_node_full_name(node));
-		return;
-	}
+	desc = of_device_get_match_data(&pdev->dev);
+	if (!desc)
+		return -EINVAL;
+
+	reg = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(reg))
+		return PTR_ERR(reg);
 
 	val = readl(reg + SUN4I_PLL_AUDIO_REG);
 
@@ -1464,19 +1467,30 @@ static void __init sun4i_ccu_init(struct device_node *node,
 	val &= ~GENMASK(7, 6);
 	writel(val | (2 << 6), reg + SUN4I_AHB_REG);
 
-	of_sunxi_ccu_probe(node, reg, desc);
+	return devm_sunxi_ccu_probe(&pdev->dev, reg, desc);
 }
 
-static void __init sun4i_a10_ccu_setup(struct device_node *node)
-{
-	sun4i_ccu_init(node, &sun4i_a10_ccu_desc);
-}
-CLK_OF_DECLARE(sun4i_a10_ccu, "allwinner,sun4i-a10-ccu",
-	       sun4i_a10_ccu_setup);
+static const struct of_device_id sun4i_a10_ccu_ids[] = {
+	{
+		.compatible = "allwinner,sun4i-a10-ccu",
+		.data = &sun4i_a10_ccu_desc,
+	},
+	{
+		.compatible = "allwinner,sun7i-a20-ccu",
+		.data = &sun7i_a20_ccu_desc,
+	},
+	{ }
+};
 
-static void __init sun7i_a20_ccu_setup(struct device_node *node)
-{
-	sun4i_ccu_init(node, &sun7i_a20_ccu_desc);
-}
-CLK_OF_DECLARE(sun7i_a20_ccu, "allwinner,sun7i-a20-ccu",
-	       sun7i_a20_ccu_setup);
+static struct platform_driver sun4i_a10_ccu_driver = {
+	.probe	= sun4i_a10_ccu_probe,
+	.driver	= {
+		.name			= "sun4i-a10-ccu",
+		.suppress_bind_attrs	= true,
+		.of_match_table		= sun4i_a10_ccu_ids,
+	},
+};
+module_platform_driver(sun4i_a10_ccu_driver);
+
+MODULE_IMPORT_NS(SUNXI_CCU);
+MODULE_LICENSE("GPL");

drivers/clk/sunxi-ng/ccu-sun50i-h6-r.c

@@ -4,7 +4,8 @@
  */
 
 #include <linux/clk-provider.h>
-#include <linux/of_address.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 
 #include "ccu_common.h"
@@ -221,30 +222,43 @@ static const struct sunxi_ccu_desc sun50i_h616_r_ccu_desc = {
 	.num_resets	= ARRAY_SIZE(sun50i_h616_r_ccu_resets),
 };
 
-static void __init sunxi_r_ccu_init(struct device_node *node,
-				    const struct sunxi_ccu_desc *desc)
+static int sun50i_h6_r_ccu_probe(struct platform_device *pdev)
 {
+	const struct sunxi_ccu_desc *desc;
 	void __iomem *reg;
 
-	reg = of_io_request_and_map(node, 0, of_node_full_name(node));
-	if (IS_ERR(reg)) {
-		pr_err("%pOF: Could not map the clock registers\n", node);
-		return;
-	}
+	desc = of_device_get_match_data(&pdev->dev);
+	if (!desc)
+		return -EINVAL;
 
-	of_sunxi_ccu_probe(node, reg, desc);
-}
+	reg = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(reg))
+		return PTR_ERR(reg);
 
-static void __init sun50i_h6_r_ccu_setup(struct device_node *node)
-{
-	sunxi_r_ccu_init(node, &sun50i_h6_r_ccu_desc);
+	return devm_sunxi_ccu_probe(&pdev->dev, reg, desc);
 }
-CLK_OF_DECLARE(sun50i_h6_r_ccu, "allwinner,sun50i-h6-r-ccu",
-	       sun50i_h6_r_ccu_setup);
 
-static void __init sun50i_h616_r_ccu_setup(struct device_node *node)
-{
-	sunxi_r_ccu_init(node, &sun50i_h616_r_ccu_desc);
-}
-CLK_OF_DECLARE(sun50i_h616_r_ccu, "allwinner,sun50i-h616-r-ccu",
-	       sun50i_h616_r_ccu_setup);
+static const struct of_device_id sun50i_h6_r_ccu_ids[] = {
+	{
+		.compatible = "allwinner,sun50i-h6-r-ccu",
+		.data = &sun50i_h6_r_ccu_desc,
+	},
+	{
+		.compatible = "allwinner,sun50i-h616-r-ccu",
+		.data = &sun50i_h616_r_ccu_desc,
+	},
+	{ }
+};
+
+static struct platform_driver sun50i_h6_r_ccu_driver = {
+	.probe	= sun50i_h6_r_ccu_probe,
+	.driver	= {
+		.name			= "sun50i-h6-r-ccu",
+		.suppress_bind_attrs	= true,
+		.of_match_table		= sun50i_h6_r_ccu_ids,
+	},
+};
+module_platform_driver(sun50i_h6_r_ccu_driver);
+
+MODULE_IMPORT_NS(SUNXI_CCU);
+MODULE_LICENSE("GPL");

drivers/clk/sunxi-ng/ccu-sun50i-h616.c

@@ -7,7 +7,7 @@
 
 #include <linux/clk-provider.h>
 #include <linux/io.h>
-#include <linux/of_address.h>
+#include <linux/module.h>
 #include <linux/platform_device.h>
 
 #include "ccu_common.h"
@@ -1082,17 +1082,15 @@ static const u32 usb2_clk_regs[] = {
 	SUN50I_H616_USB3_CLK_REG,
 };
 
-static void __init sun50i_h616_ccu_setup(struct device_node *node)
+static int sun50i_h616_ccu_probe(struct platform_device *pdev)
 {
 	void __iomem *reg;
 	u32 val;
 	int i;
 
-	reg = of_io_request_and_map(node, 0, of_node_full_name(node));
-	if (IS_ERR(reg)) {
-		pr_err("%pOF: Could not map clock registers\n", node);
-		return;
-	}
+	reg = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(reg))
+		return PTR_ERR(reg);
 
 	/* Enable the lock bits and the output enable bits on all PLLs */
 	for (i = 0; i < ARRAY_SIZE(pll_regs); i++) {
@@ -1141,8 +1139,23 @@ static void __init sun50i_h616_ccu_setup(struct device_node *node)
 	val |= BIT(24);
 	writel(val, reg + SUN50I_H616_HDMI_CEC_CLK_REG);
 
-	of_sunxi_ccu_probe(node, reg, &sun50i_h616_ccu_desc);
+	return devm_sunxi_ccu_probe(&pdev->dev, reg, &sun50i_h616_ccu_desc);
 }
 
-CLK_OF_DECLARE(sun50i_h616_ccu, "allwinner,sun50i-h616-ccu",
-	       sun50i_h616_ccu_setup);
+static const struct of_device_id sun50i_h616_ccu_ids[] = {
+	{ .compatible = "allwinner,sun50i-h616-ccu" },
+	{ }
+};
+
+static struct platform_driver sun50i_h616_ccu_driver = {
+	.probe	= sun50i_h616_ccu_probe,
+	.driver	= {
+		.name			= "sun50i-h616-ccu",
+		.suppress_bind_attrs	= true,
+		.of_match_table		= sun50i_h616_ccu_ids,
+	},
+};
+module_platform_driver(sun50i_h616_ccu_driver);
+
+MODULE_IMPORT_NS(SUNXI_CCU);
+MODULE_LICENSE("GPL");

drivers/clk/sunxi-ng/ccu-sun6i-a31.c

@@ -9,7 +9,8 @@
 
 #include <linux/clk-provider.h>
 #include <linux/io.h>
-#include <linux/of_address.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
 
 #include "ccu_common.h"
 #include "ccu_reset.h"
@@ -1226,16 +1227,15 @@ static struct ccu_mux_nb sun6i_a31_cpu_nb = {
 	.bypass_index	= 1, /* index of 24 MHz oscillator */
 };
 
-static void __init sun6i_a31_ccu_setup(struct device_node *node)
+static int sun6i_a31_ccu_probe(struct platform_device *pdev)
 {
 	void __iomem *reg;
+	int ret;
 	u32 val;
 
-	reg = of_io_request_and_map(node, 0, of_node_full_name(node));
-	if (IS_ERR(reg)) {
-		pr_err("%pOF: Could not map the clock registers\n", node);
-		return;
-	}
+	reg = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(reg))
+		return PTR_ERR(reg);
 
 	/* Force the PLL-Audio-1x divider to 1 */
 	val = readl(reg + SUN6I_A31_PLL_AUDIO_REG);
@@ -1257,10 +1257,30 @@ static void __init sun6i_a31_ccu_setup(struct device_node *node)
 	val |= 0x3 << 12;
 	writel(val, reg + SUN6I_A31_AHB1_REG);
 
-	of_sunxi_ccu_probe(node, reg, &sun6i_a31_ccu_desc);
+	ret = devm_sunxi_ccu_probe(&pdev->dev, reg, &sun6i_a31_ccu_desc);
+	if (ret)
+		return ret;
 
 	ccu_mux_notifier_register(pll_cpu_clk.common.hw.clk,
 				  &sun6i_a31_cpu_nb);
+
+	return 0;
 }
-CLK_OF_DECLARE(sun6i_a31_ccu, "allwinner,sun6i-a31-ccu",
-	       sun6i_a31_ccu_setup);
+
+static const struct of_device_id sun6i_a31_ccu_ids[] = {
+	{ .compatible = "allwinner,sun6i-a31-ccu" },
+	{ }
+};
+
+static struct platform_driver sun6i_a31_ccu_driver = {
+	.probe	= sun6i_a31_ccu_probe,
+	.driver	= {
+		.name			= "sun6i-a31-ccu",
+		.suppress_bind_attrs	= true,
+		.of_match_table		= sun6i_a31_ccu_ids,
+	},
+};
+module_platform_driver(sun6i_a31_ccu_driver);
+
+MODULE_IMPORT_NS(SUNXI_CCU);
+MODULE_LICENSE("GPL");