pinctrl: stm32: Convert to use APIs which support live DT

Use ofnode_ or dev_ APIs instead of fdt_ and fdtdec_ APIs so that the
driver can support live DT.
Signed-off-by: NPatrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: NPatrice Chotard <patrice.chotard@st.com>

drivers/pinctrl/pinctrl_stm32.c

@@ -13,8 +13,6 @@
 #include <linux/err.h>
 #include <linux/libfdt.h>
 
-DECLARE_GLOBAL_DATA_PTR;
-
 #define MAX_PINS_ONE_IP			70
 #define MODE_BITS_MASK			3
 #define OSPEED_MASK			3
@@ -308,7 +306,8 @@ static int prep_gpio_dsc(struct stm32_gpio_dsc *gpio_dsc, u32 port_pin)
 	return 0;
 }
 
-static int prep_gpio_ctl(struct stm32_gpio_ctl *gpio_ctl, u32 gpio_fn, int node)
+static int prep_gpio_ctl(struct stm32_gpio_ctl *gpio_ctl, u32 gpio_fn,
+			 ofnode node)
 {
 	gpio_fn &= 0x00FF;
 	gpio_ctl->af = 0;
@@ -329,16 +328,16 @@ static int prep_gpio_ctl(struct stm32_gpio_ctl *gpio_ctl, u32 gpio_fn, int node)
 		break;
 	}
 
-	gpio_ctl->speed = fdtdec_get_int(gd->fdt_blob, node, "slew-rate", 0);
+	gpio_ctl->speed = ofnode_read_u32_default(node, "slew-rate", 0);
 
-	if (fdtdec_get_bool(gd->fdt_blob, node, "drive-open-drain"))
+	if (ofnode_read_bool(node, "drive-open-drain"))
 		gpio_ctl->otype = STM32_GPIO_OTYPE_OD;
 	else
 		gpio_ctl->otype = STM32_GPIO_OTYPE_PP;
 
-	if (fdtdec_get_bool(gd->fdt_blob, node, "bias-pull-up"))
+	if (ofnode_read_bool(node, "bias-pull-up"))
 		gpio_ctl->pupd = STM32_GPIO_PUPD_UP;
-	else if (fdtdec_get_bool(gd->fdt_blob, node, "bias-pull-down"))
+	else if (ofnode_read_bool(node, "bias-pull-down"))
 		gpio_ctl->pupd = STM32_GPIO_PUPD_DOWN;
 	else
 		gpio_ctl->pupd = STM32_GPIO_PUPD_NO;
@@ -350,32 +349,37 @@ static int prep_gpio_ctl(struct stm32_gpio_ctl *gpio_ctl, u32 gpio_fn, int node)
 	return 0;
 }
 
-static int stm32_pinctrl_config(int offset)
+static int stm32_pinctrl_config(ofnode node)
 {
 	u32 pin_mux[MAX_PINS_ONE_IP];
 	int rv, len;
+	ofnode subnode;
 
 	/*
 	 * check for "pinmux" property in each subnode (e.g. pins1 and pins2 for
 	 * usart1) of pin controller phandle "pinctrl-0"
 	 * */
-	fdt_for_each_subnode(offset, gd->fdt_blob, offset) {
+	ofnode_for_each_subnode(subnode, node) {
 		struct stm32_gpio_dsc gpio_dsc;
 		struct stm32_gpio_ctl gpio_ctl;
 		int i;
 
-		len = fdtdec_get_int_array_count(gd->fdt_blob, offset,
-						 "pinmux", pin_mux,
-						 ARRAY_SIZE(pin_mux));
+		rv = ofnode_read_size(subnode, "pinmux");
+		if (rv < 0)
+			return rv;
+		len = rv / sizeof(pin_mux[0]);
 		debug("%s: no of pinmux entries= %d\n", __func__, len);
-		if (len < 0)
+		if (len > MAX_PINS_ONE_IP)
 			return -EINVAL;
+		rv = ofnode_read_u32_array(subnode, "pinmux", pin_mux, len);
+		if (rv < 0)
+			return rv;
 		for (i = 0; i < len; i++) {
 			struct gpio_desc desc;
 
 			debug("%s: pinmux = %x\n", __func__, *(pin_mux + i));
 			prep_gpio_dsc(&gpio_dsc, *(pin_mux + i));
-			prep_gpio_ctl(&gpio_ctl, *(pin_mux + i), offset);
+			prep_gpio_ctl(&gpio_ctl, *(pin_mux + i), subnode);
 			rv = uclass_get_device_by_seq(UCLASS_GPIO,
 						      gpio_dsc.port,
 						      &desc.dev);
@@ -424,19 +428,18 @@ static int stm32_pinctrl_bind(struct udevice *dev)
 #if CONFIG_IS_ENABLED(PINCTRL_FULL)
 static int stm32_pinctrl_set_state(struct udevice *dev, struct udevice *config)
 {
-	return stm32_pinctrl_config(dev_of_offset(config));
+	return stm32_pinctrl_config(dev_ofnode(config));
 }
 #else /* PINCTRL_FULL */
 static int stm32_pinctrl_set_state_simple(struct udevice *dev,
 					  struct udevice *periph)
 {
-	const void *fdt = gd->fdt_blob;
 	const fdt32_t *list;
 	uint32_t phandle;
-	int config_node;
+	ofnode config_node;
 	int size, i, ret;
 
-	list = fdt_getprop(fdt, dev_of_offset(periph), "pinctrl-0", &size);
+	list = ofnode_get_property(dev_ofnode(periph), "pinctrl-0", &size);
 	if (!list)
 		return -EINVAL;
 
@@ -446,8 +449,8 @@ static int stm32_pinctrl_set_state_simple(struct udevice *dev,
 	for (i = 0; i < size; i++) {
 		phandle = fdt32_to_cpu(*list++);
 
-		config_node = fdt_node_offset_by_phandle(fdt, phandle);
-		if (config_node < 0) {
+		config_node = ofnode_get_by_phandle(phandle);
+		if (!ofnode_valid(config_node)) {
 			pr_err("prop pinctrl-0 index %d invalid phandle\n", i);
 			return -EINVAL;
 		}