reset: sunxi: Reuse the platform data from the clock driver

The clock and reset drivers use the exact same platform data. Simplify
them by sharing the object. This is safe because the parent device
(the clock device) always gets its driver model callbacks run first.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Acked-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

drivers/clk/sunxi/clk_sunxi.c

@@ -12,9 +12,12 @@
 #include <reset.h>
 #include <asm/io.h>
 #include <clk/sunxi.h>
+#include <dm/device-internal.h>
 #include <linux/bitops.h>
 #include <linux/log2.h>
 
+extern U_BOOT_DRIVER(sunxi_reset);
+
 static const struct ccu_clk_gate *plat_to_gate(struct ccu_plat *plat,
 					       unsigned long id)
 {
@@ -69,7 +72,9 @@ struct clk_ops sunxi_clk_ops = {
 
 static int sunxi_clk_bind(struct udevice *dev)
 {
-	return sunxi_reset_bind(dev);
+	/* Reuse the platform data for the reset driver. */
+	return device_bind(dev, DM_DRIVER_REF(sunxi_reset), "reset",
+			   dev_get_plat(dev), dev_ofnode(dev), NULL);
 }
 
 static int sunxi_clk_probe(struct udevice *dev)

drivers/reset/reset-sunxi.c

@@ -12,17 +12,10 @@
 #include <reset-uclass.h>
 #include <asm/io.h>
 #include <clk/sunxi.h>
-#include <dm/device-internal.h>
-#include <dm/lists.h>
 #include <linux/bitops.h>
 #include <linux/log2.h>
 
-struct sunxi_reset_plat {
-	void *base;
-	const struct ccu_desc *desc;
-};
-
-static const struct ccu_reset *plat_to_reset(struct sunxi_reset_plat *plat,
+static const struct ccu_reset *plat_to_reset(struct ccu_plat *plat,
 					     unsigned long id)
 {
 	return	&plat->desc->resets[id];
@@ -30,7 +23,7 @@ static const struct ccu_reset *plat_to_reset(struct sunxi_reset_plat *plat,
 
 static int sunxi_reset_request(struct reset_ctl *reset_ctl)
 {
-	struct sunxi_reset_plat *plat = dev_get_plat(reset_ctl->dev);
+	struct ccu_plat *plat = dev_get_plat(reset_ctl->dev);
 
 	debug("%s: (RST#%ld)\n", __func__, reset_ctl->id);
 
@@ -42,7 +35,7 @@ static int sunxi_reset_request(struct reset_ctl *reset_ctl)
 
 static int sunxi_set_reset(struct reset_ctl *reset_ctl, bool on)
 {
-	struct sunxi_reset_plat *plat = dev_get_plat(reset_ctl->dev);
+	struct ccu_plat *plat = dev_get_plat(reset_ctl->dev);
 	const struct ccu_reset *reset = plat_to_reset(plat, reset_ctl->id);
 	u32 reg;
 
@@ -81,38 +74,8 @@ struct reset_ops sunxi_reset_ops = {
 	.rst_deassert = sunxi_reset_deassert,
 };
 
-static int sunxi_reset_of_to_plat(struct udevice *dev)
-{
-	struct sunxi_reset_plat *plat = dev_get_plat(dev);
-
-	plat->base = dev_read_addr_ptr(dev);
-
-	return 0;
-}
-
-int sunxi_reset_bind(struct udevice *dev)
-{
-	struct udevice *rst_dev;
-	struct sunxi_reset_plat *plat;
-	int ret;
-
-	ret = device_bind_driver_to_node(dev, "sunxi_reset", "reset",
-					 dev_ofnode(dev), &rst_dev);
-	if (ret) {
-		debug("failed to bind sunxi_reset driver (ret=%d)\n", ret);
-		return ret;
-	}
-	plat = malloc(sizeof(struct sunxi_reset_plat));
-	plat->desc = (const struct ccu_desc *)dev_get_driver_data(dev);
-	dev_set_plat(rst_dev, plat);
-
-	return 0;
-}
-
 U_BOOT_DRIVER(sunxi_reset) = {
 	.name		= "sunxi_reset",
 	.id		= UCLASS_RESET,
 	.ops		= &sunxi_reset_ops,
-	.of_to_plat	= sunxi_reset_of_to_plat,
-	.plat_auto	= sizeof(struct sunxi_reset_plat),
 };

include/clk/sunxi.h

@@ -87,12 +87,4 @@ struct ccu_plat {
 
 extern struct clk_ops sunxi_clk_ops;
 
-/**
- * sunxi_reset_bind() - reset binding
- *
- * @dev:       reset device
- * Return: 0 success, or error value
- */
-int sunxi_reset_bind(struct udevice *dev);
-
 #endif /* _CLK_SUNXI_H */