ramips: reset mt7620 ethernet phy via reset controller

Use reset controller to reset mt7620 ethernet phy instead of directly
writing system control registers. The reset line of "ephy" is 24, so
the DTS resets properties have been updated to get the correct reset
signal.

Tested on HiWiFi HC5861.

Signed-off-by: Shiji Yang <[email protected]>

diff --git a/target/linux/ramips/dts/mt7620a.dtsi b/target/linux/ramips/dts/mt7620a.dtsi
index a1dfa8c73008988923773b1b67fe2d08d8a6dae2..0fa503e7a2c099a72bea6ee0dbcc8404dc92746d 100644 (file)
--- a/target/linux/ramips/dts/mt7620a.dtsi
+++ b/target/linux/ramips/dts/mt7620a.dtsi
@@ -490,8 +490,8 @@
                compatible = "mediatek,mt7620-gsw";
                reg = <0x10110000 0x8000>;
 
-               resets = <&sysc 23>;
-               reset-names = "esw";
+               resets = <&sysc 24>;
+               reset-names = "ephy";
 
                interrupt-parent = <&intc>;
                interrupts = <17>;

diff --git a/target/linux/ramips/dts/mt7620n.dtsi b/target/linux/ramips/dts/mt7620n.dtsi
index f4a5165704959c80f91956e3c8f37e5b843230f2..4f07c6bc4b25fd54ee744702706f92031a58f4e1 100644 (file)
--- a/target/linux/ramips/dts/mt7620n.dtsi
+++ b/target/linux/ramips/dts/mt7620n.dtsi
@@ -317,8 +317,8 @@
                compatible = "mediatek,mt7620-gsw";
                reg = <0x10110000 0x8000>;
 
-               resets = <&sysc 23>;
-               reset-names = "esw";
+               resets = <&sysc 24>;
+               reset-names = "ephy";
 
                interrupt-parent = <&intc>;
                interrupts = <17>;

diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620.c b/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620.c
index 84b6e305a4f9e3cd6ae18f3d489bd4146cfba5eb..dcaff04db1ea86f1404c6d836e608fa71c713108 100644 (file)
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620.c
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620.c
@@ -61,6 +61,17 @@ static irqreturn_t gsw_interrupt_mt7620(int irq, void *_priv)
        return IRQ_HANDLED;
 }
 
+static void gsw_reset_ephy(struct mt7620_gsw *gsw)
+{
+       if (!gsw->rst_ephy)
+               return;
+
+       reset_control_assert(gsw->rst_ephy);
+       usleep_range(10, 20);
+       reset_control_deassert(gsw->rst_ephy);
+       usleep_range(10, 20);
+}
+
 static void mt7620_ephy_init(struct mt7620_gsw *gsw)
 {
        u32 i;
@@ -79,7 +90,7 @@ static void mt7620_ephy_init(struct mt7620_gsw *gsw)
                mtk_switch_w32(gsw, mtk_switch_r32(gsw, GSW_REG_GPC1) |
                        (gsw->ephy_base << 16),
                        GSW_REG_GPC1);
-               fe_reset(MT7620A_RESET_EPHY);
+               gsw_reset_ephy(gsw);
 
                pr_info("gsw: ephy base address: %d\n", gsw->ephy_base);
        }
@@ -263,6 +274,12 @@ static int mt7620_gsw_probe(struct platform_device *pdev)
 
        gsw->irq = platform_get_irq(pdev, 0);
 
+       gsw->rst_ephy = devm_reset_control_get_exclusive(&pdev->dev, "ephy");
+       if (IS_ERR(gsw->rst_ephy)) {
+               dev_err(gsw->dev, "failed to get EPHY reset: %pe\n", gsw->rst_ephy);
+               gsw->rst_ephy = NULL;
+       }
+
        platform_set_drvdata(pdev, gsw);
 
        return 0;

diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620.h b/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620.h
index cb5d098e9cea48cc085c400834b1570026c00d8c..12cab39b771f07de6a805177242dbc911dd913c7 100644 (file)
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620.h
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620.h
@@ -12,6 +12,8 @@
  *   Copyright (C) 2013-2015 Michael Lee <[email protected]>
  */
 
+#include <linux/reset.h>
+
 #ifndef _RALINK_GSW_MT7620_H__
 #define _RALINK_GSW_MT7620_H__
 
@@ -90,6 +92,7 @@ enum {
 
 struct mt7620_gsw {
        struct device           *dev;
+       struct reset_control    *rst_ephy;
        void __iomem            *base;
        int                     irq;
        bool                    ephy_disable;

diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.c b/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.c
index 9c11e9cc894c3a771185eff638c2dbc0a3a8957a..c741c85f4a5599c8624a15009a2af37e19b59d6d 100644 (file)
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.c
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.c
@@ -61,8 +61,6 @@
 #define NEXT_TX_DESP_IDX(X)    (((X) + 1) & (ring->tx_ring_size - 1))
 #define NEXT_RX_DESP_IDX(X)    (((X) + 1) & (ring->rx_ring_size - 1))
 
-#define SYSC_REG_RSTCTRL       0x34
-
 static int fe_msg_level = -1;
 module_param_named(msg_level, fe_msg_level, int, 0);
 MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)");
@@ -127,20 +125,6 @@ void fe_m32(struct fe_priv *eth, u32 clear, u32 set, unsigned reg)
        spin_unlock(&eth->page_lock);
 }
 
-void fe_reset(u32 reset_bits)
-{
-       u32 t;
-
-       t = rt_sysc_r32(SYSC_REG_RSTCTRL);
-       t |= reset_bits;
-       rt_sysc_w32(t, SYSC_REG_RSTCTRL);
-       usleep_range(10, 20);
-
-       t &= ~reset_bits;
-       rt_sysc_w32(t, SYSC_REG_RSTCTRL);
-       usleep_range(10, 20);
-}
-
 static void fe_reset_fe(struct fe_priv *priv)
 {
        if (!priv->resets)

diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.h b/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.h
index 619319d18e7799a1b94923b352f942149fe19204..7b291ff43e5e2637319ea1e788dbb8eaf55ed27e 100644 (file)
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.h
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.h
@@ -157,8 +157,6 @@ enum fe_work_flag {
 #define MT7620A_FE_GDMA1_MAC_ADRL      (MT7620A_GDMA_OFFSET + 0x0C)
 #define MT7620A_FE_GDMA1_MAC_ADRH      (MT7620A_GDMA_OFFSET + 0x10)
 
-#define MT7620A_RESET_EPHY     BIT(24)
-
 #define RT5350_TX_BASE_PTR0    (RT5350_PDMA_OFFSET + 0x00)
 #define RT5350_TX_MAX_CNT0     (RT5350_PDMA_OFFSET + 0x04)
 #define RT5350_TX_CTX_IDX0     (RT5350_PDMA_OFFSET + 0x08)
@@ -513,8 +511,6 @@ void fe_fwd_config(struct fe_priv *priv);
 void fe_reg_w32(u32 val, enum fe_reg reg);
 u32 fe_reg_r32(enum fe_reg reg);
 
-void fe_reset(u32 reset_bits);
-
 static inline void *priv_netdev(struct fe_priv *priv)
 {
        return (char *)priv - ALIGN(sizeof(struct net_device), NETDEV_ALIGN);