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927fe598db
Add pending patch to make address some workaround needed to make the Aeonsemi AS21xxx PHY working on the Airoha AN7581/AN7583 board. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
130 lines
4.6 KiB
Diff
130 lines
4.6 KiB
Diff
From f2c6f8711c3866caafee997cfa60af4f38879be0 Mon Sep 17 00:00:00 2001
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From: Christian Marangi <ansuelsmth@gmail.com>
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Date: Wed, 25 Jun 2025 00:45:11 +0200
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Subject: [PATCH 1/2] net: phy: add PHY_DETACH_NO_HW_RESET PHY flag
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Some PHY require a firmware to correctly work and such firmware might
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get reset when the GPIO reset is assert.
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This is the case for the Aeonsemi PHY where when the PHY is torn down,
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phy_detach() is called that assert the GPIO reset pin resetting the
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firmware.
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To handle this introduce a flag, PHY_DETACH_NO_HW_RESET that instruct
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phy_detach() to skip asserting the GPIO reset on detaching the PHY.
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The PHY is still reset in all other case where it's removed or the PHY
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fails to probe.
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Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
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---
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drivers/net/phy/as21xxx.c | 10 ++++++++++
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drivers/net/phy/phy_device.c | 3 ++-
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include/linux/phy.h | 1 +
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3 files changed, 13 insertions(+), 1 deletion(-)
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--- a/drivers/net/phy/as21xxx.c
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+++ b/drivers/net/phy/as21xxx.c
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@@ -964,6 +964,7 @@ static struct phy_driver as21xxx_drivers
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.led_hw_control_set = as21xxx_led_hw_control_set,
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.led_hw_control_get = as21xxx_led_hw_control_get,
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.led_polarity_set = as21xxx_led_polarity_set,
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+ .flags = PHY_DETACH_NO_RESET,
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},
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{
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PHY_ID_MATCH_EXACT(PHY_ID_AS21011PB1),
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@@ -976,6 +977,7 @@ static struct phy_driver as21xxx_drivers
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.led_hw_control_set = as21xxx_led_hw_control_set,
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.led_hw_control_get = as21xxx_led_hw_control_get,
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.led_polarity_set = as21xxx_led_polarity_set,
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+ .flags = PHY_DETACH_NO_RESET,
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},
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{
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PHY_ID_MATCH_EXACT(PHY_ID_AS21010PB1),
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@@ -988,6 +990,7 @@ static struct phy_driver as21xxx_drivers
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.led_hw_control_set = as21xxx_led_hw_control_set,
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.led_hw_control_get = as21xxx_led_hw_control_get,
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.led_polarity_set = as21xxx_led_polarity_set,
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+ .flags = PHY_DETACH_NO_RESET,
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},
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{
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PHY_ID_MATCH_EXACT(PHY_ID_AS21010JB1),
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@@ -1000,6 +1003,7 @@ static struct phy_driver as21xxx_drivers
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.led_hw_control_set = as21xxx_led_hw_control_set,
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.led_hw_control_get = as21xxx_led_hw_control_get,
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.led_polarity_set = as21xxx_led_polarity_set,
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+ .flags = PHY_DETACH_NO_RESET,
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},
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{
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PHY_ID_MATCH_EXACT(PHY_ID_AS21210PB1),
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@@ -1012,6 +1016,7 @@ static struct phy_driver as21xxx_drivers
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.led_hw_control_set = as21xxx_led_hw_control_set,
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.led_hw_control_get = as21xxx_led_hw_control_get,
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.led_polarity_set = as21xxx_led_polarity_set,
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+ .flags = PHY_DETACH_NO_RESET,
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},
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{
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PHY_ID_MATCH_EXACT(PHY_ID_AS21510JB1),
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@@ -1024,6 +1029,7 @@ static struct phy_driver as21xxx_drivers
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.led_hw_control_set = as21xxx_led_hw_control_set,
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.led_hw_control_get = as21xxx_led_hw_control_get,
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.led_polarity_set = as21xxx_led_polarity_set,
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+ .flags = PHY_DETACH_NO_RESET,
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},
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{
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PHY_ID_MATCH_EXACT(PHY_ID_AS21510PB1),
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@@ -1036,6 +1042,7 @@ static struct phy_driver as21xxx_drivers
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.led_hw_control_set = as21xxx_led_hw_control_set,
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.led_hw_control_get = as21xxx_led_hw_control_get,
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.led_polarity_set = as21xxx_led_polarity_set,
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+ .flags = PHY_DETACH_NO_RESET,
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},
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{
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PHY_ID_MATCH_EXACT(PHY_ID_AS21511JB1),
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@@ -1048,6 +1055,7 @@ static struct phy_driver as21xxx_drivers
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.led_hw_control_set = as21xxx_led_hw_control_set,
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.led_hw_control_get = as21xxx_led_hw_control_get,
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.led_polarity_set = as21xxx_led_polarity_set,
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+ .flags = PHY_DETACH_NO_RESET,
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},
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{
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PHY_ID_MATCH_EXACT(PHY_ID_AS21210JB1),
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@@ -1060,6 +1068,7 @@ static struct phy_driver as21xxx_drivers
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.led_hw_control_set = as21xxx_led_hw_control_set,
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.led_hw_control_get = as21xxx_led_hw_control_get,
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.led_polarity_set = as21xxx_led_polarity_set,
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+ .flags = PHY_DETACH_NO_RESET,
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},
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{
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PHY_ID_MATCH_EXACT(PHY_ID_AS21511PB1),
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@@ -1072,6 +1081,7 @@ static struct phy_driver as21xxx_drivers
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.led_hw_control_set = as21xxx_led_hw_control_set,
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.led_hw_control_get = as21xxx_led_hw_control_get,
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.led_polarity_set = as21xxx_led_polarity_set,
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+ .flags = PHY_DETACH_NO_RESET,
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},
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};
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module_phy_driver(as21xxx_drivers);
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--- a/drivers/net/phy/phy_device.c
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+++ b/drivers/net/phy/phy_device.c
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@@ -2074,7 +2074,8 @@ void phy_detach(struct phy_device *phyde
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device_release_driver(&phydev->mdio.dev);
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/* Assert the reset signal */
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- phy_device_reset(phydev, 1);
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+ if (!(phydev->drv->flags & PHY_DETACH_NO_HW_RESET))
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+ phy_device_reset(phydev, 1);
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/*
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* The phydev might go away on the put_device() below, so avoid
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--- a/include/linux/phy.h
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+++ b/include/linux/phy.h
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@@ -90,6 +90,7 @@ extern const int phy_10gbit_features_arr
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#define PHY_RST_AFTER_CLK_EN 0x00000002
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#define PHY_POLL_CABLE_TEST 0x00000004
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#define PHY_ALWAYS_CALL_SUSPEND 0x00000008
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+#define PHY_DETACH_NO_HW_RESET 0x00000010
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#define MDIO_DEVICE_IS_PHY 0x80000000
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/**
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