ramips: ethernet: ralink: use the reset controller api for esw & ephy

Instead of writing direct into the reset registers.

Signed-off-by: Alexander Couzens <[email protected]>

target/linux/ramips/dts/mt7628an.dtsi

@@ -439,8 +439,8 @@
 		compatible = "mediatek,mt7628-esw", "ralink,rt3050-esw";
 		reg = <0x10110000 0x8000>;
 
-		resets = <&rstctrl 23>;
-		reset-names = "esw";
+		resets = <&rstctrl 23 &rstctrl 24>;
+		reset-names = "esw", "ephy";
 
 		interrupt-parent = <&intc>;
 		interrupts = <17>;

target/linux/ramips/dts/rt3050.dtsi

@@ -319,8 +319,8 @@
 		compatible = "ralink,rt3050-esw";
 		reg = <0x10110000 0x8000>;
 
-		resets = <&rstctrl 23>;
-		reset-names = "esw";
+		resets = <&rstctrl 23 &rstctrl 24>;
+		reset-names = "esw", "ephy";
 
 		interrupt-parent = <&intc>;
 		interrupts = <17>;

target/linux/ramips/dts/rt3352.dtsi

@@ -331,8 +331,8 @@
 		compatible = "ralink,rt3352-esw", "ralink,rt3050-esw";
 		reg = <0x10110000 0x8000>;
 
-		resets = <&rstctrl 23>;
-		reset-names = "esw";
+		resets = <&rstctrl 23 &rstctrl 24>;
+		reset-names = "esw", "ephy";
 
 		interrupt-parent = <&intc>;
 		interrupts = <17>;

target/linux/ramips/dts/rt5350.dtsi

@@ -356,8 +356,8 @@
 		compatible = "ralink,rt5350-esw", "ralink,rt3050-esw";
 		reg = <0x10110000 0x8000>;
 
-		resets = <&rstctrl 23>;
-		reset-names = "esw";
+		resets = <&rstctrl 23 &rstctrl 24>;
+		reset-names = "esw", "ephy";
 
 		interrupt-parent = <&intc>;
 		interrupts = <17>;

target/linux/ramips/files/drivers/net/ethernet/ralink/esw_rt3050.c

@@ -17,9 +17,11 @@
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <asm/mach-ralink/ralink_regs.h>
+#include <linux/of_device.h>
 #include <linux/of_irq.h>
 
 #include <linux/switch.h>
+#include <linux/reset.h>
 
 #include "mtk_eth_soc.h"
 
@@ -172,7 +174,6 @@
 
 #define RT5350_ESW_REG_PXTPC(_x)	(0x150 + (4 * _x))
 #define RT5350_EWS_REG_LED_POLARITY	0x168
-#define RT5350_RESET_EPHY		BIT(24)
 
 enum {
 	/* Global attributes. */
@@ -232,6 +233,8 @@ struct rt305x_esw {
 	int			led_frequency;
 	struct esw_vlan vlans[RT305X_ESW_NUM_VLANS];
 	struct esw_port ports[RT305X_ESW_NUM_PORTS];
+	struct reset_control	*rst_esw;
+	struct reset_control	*rst_ephy;
 
 };
 
@@ -254,6 +257,29 @@ static inline void esw_rmw_raw(struct rt305x_esw *esw, unsigned reg,
 	__raw_writel(t | val, esw->base + reg);
 }
 
+static void esw_reset(struct rt305x_esw *esw)
+{
+	if (!esw->rst_esw)
+		return;
+
+	reset_control_assert(esw->rst_esw);
+	usleep_range(60, 120);
+	reset_control_deassert(esw->rst_esw);
+	/* the esw takes long to reset otherwise the board hang */
+	msleep(10);
+}
+
+static void esw_reset_ephy(struct rt305x_esw *esw)
+{
+	if (!esw->rst_ephy)
+		return;
+
+	reset_control_assert(esw->rst_ephy);
+	usleep_range(60, 120);
+	reset_control_deassert(esw->rst_ephy);
+	usleep_range(60, 120);
+}
+
 static void esw_rmw(struct rt305x_esw *esw, unsigned reg,
 		    unsigned long mask, unsigned long val)
 {
@@ -505,8 +531,7 @@ static void esw_hw_init(struct rt305x_esw *esw)
 		esw->ports[i].disable = (port_disable & (1 << i)) != 0;
 
 	if (ralink_soc == RT305X_SOC_RT3352) {
-		/* reset EPHY */
-		fe_reset(RT5350_RESET_EPHY);
+		esw_reset_ephy(esw);
 
 		rt305x_mii_write(esw, 0, 31, 0x8000);
 		for (i = 0; i < 5; i++) {
@@ -556,8 +581,7 @@ static void esw_hw_init(struct rt305x_esw *esw)
 		/* select local register */
 		rt305x_mii_write(esw, 0, 31, 0x8000);
 	} else if (ralink_soc == RT305X_SOC_RT5350) {
-		/* reset EPHY */
-		fe_reset(RT5350_RESET_EPHY);
+		esw_reset_ephy(esw);
 
 		/* set the led polarity */
 		esw_w32(esw, esw->reg_led_polarity & 0x1F,
@@ -614,8 +638,7 @@ static void esw_hw_init(struct rt305x_esw *esw)
 	} else if (ralink_soc == MT762X_SOC_MT7628AN || ralink_soc == MT762X_SOC_MT7688) {
 		int i;
 
-		/* reset EPHY */
-		fe_reset(RT5350_RESET_EPHY);
+		esw_reset_ephy(esw);
 
 		/* set the led polarity */
 		esw_w32(esw, esw->reg_led_polarity & 0x1F,
@@ -1385,6 +1408,13 @@ static int esw_probe(struct platform_device *pdev)
 	if (reg_init)
 		esw->reg_led_polarity = be32_to_cpu(*reg_init);
 
+	esw->rst_esw = devm_reset_control_get(&pdev->dev, "esw");
+	if (IS_ERR(esw->rst_esw))
+		esw->rst_esw = NULL;
+	esw->rst_ephy = devm_reset_control_get(&pdev->dev, "ephy");
+	if (IS_ERR(esw->rst_ephy))
+		esw->rst_ephy = NULL;
+
 	swdev = &esw->swdev;
 	swdev->of_node = pdev->dev.of_node;
 	swdev->name = "rt305x-esw";