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7bf73e270e
In Linux v5.14 an extra feature was introduced for the RTL8211F phy, allowing to disable a clock output from the phy. Part of that patch is to always (soft) reset the phy upon initialisation. This phy reset is required to have a working ethernet on the TP-Link EAP225-Outdoor v3 and EAP225 v4 after a reboot. Otherwise the ethernet port will only function properly on cold boots. Tested-by: Andre Klärner <kandre@ak-online.be> # EAP225-Outdoor v3 Tested-by: Sven Hauer <sven.hauer+github@uniku.de> # EAP225 v4 Signed-off-by: Sander Vanheule <sander@svanheule.net>
120 lines
3.3 KiB
Diff
120 lines
3.3 KiB
Diff
From 0a4355c2b7f8ecd5e61cc262ecdbd4a2cce1ea7e Mon Sep 17 00:00:00 2001
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From: Joakim Zhang <qiangqing.zhang@nxp.com>
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Date: Tue, 8 Jun 2021 11:15:33 +0800
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Subject: [PATCH] net: phy: realtek: add dt property to disable CLKOUT clock
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CLKOUT is enabled by default after PHY hardware reset, this patch adds
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"realtek,clkout-disable" property for user to disable CLKOUT clock
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to save PHY power.
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Per RTL8211F guide, a PHY reset should be issued after setting these
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bits in PHYCR2 register. After this patch, CLKOUT clock output to be
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disabled.
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Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/phy/realtek.c | 42 ++++++++++++++++++++++++++++++++++++++-
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1 file changed, 41 insertions(+), 1 deletion(-)
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--- a/drivers/net/phy/realtek.c
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+++ b/drivers/net/phy/realtek.c
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@@ -8,6 +8,7 @@
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* Copyright (c) 2004 Freescale Semiconductor, Inc.
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*/
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#include <linux/bitops.h>
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+#include <linux/of.h>
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#include <linux/phy.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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@@ -27,6 +28,7 @@
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#define RTL821x_PAGE_SELECT 0x1f
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#define RTL8211F_PHYCR1 0x18
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+#define RTL8211F_PHYCR2 0x19
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#define RTL8211F_INSR 0x1d
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#define RTL8211F_TX_DELAY BIT(8)
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@@ -40,6 +42,8 @@
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#define RTL8211E_TX_DELAY BIT(12)
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#define RTL8211E_RX_DELAY BIT(11)
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+#define RTL8211F_CLKOUT_EN BIT(0)
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+
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#define RTL8201F_ISR 0x1e
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#define RTL8201F_IER 0x13
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@@ -62,6 +66,10 @@ MODULE_DESCRIPTION("Realtek PHY driver")
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MODULE_AUTHOR("Johnson Leung");
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MODULE_LICENSE("GPL");
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+struct rtl821x_priv {
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+ u16 phycr2;
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+};
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+
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static int rtl821x_read_page(struct phy_device *phydev)
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{
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return __phy_read(phydev, RTL821x_PAGE_SELECT);
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@@ -72,6 +80,28 @@ static int rtl821x_write_page(struct phy
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return __phy_write(phydev, RTL821x_PAGE_SELECT, page);
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}
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+static int rtl821x_probe(struct phy_device *phydev)
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+{
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+ struct device *dev = &phydev->mdio.dev;
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+ struct rtl821x_priv *priv;
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+
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+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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+ if (!priv)
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+ return -ENOMEM;
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+
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+ priv->phycr2 = phy_read_paged(phydev, 0xa43, RTL8211F_PHYCR2);
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+ if (priv->phycr2 < 0)
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+ return priv->phycr2;
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+
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+ priv->phycr2 &= RTL8211F_CLKOUT_EN;
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+ if (of_property_read_bool(dev->of_node, "realtek,clkout-disable"))
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+ priv->phycr2 &= ~RTL8211F_CLKOUT_EN;
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+
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+ phydev->priv = priv;
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+
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+ return 0;
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+}
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+
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static int rtl8201_ack_interrupt(struct phy_device *phydev)
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{
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int err;
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@@ -180,6 +210,7 @@ static int rtl8211c_config_init(struct p
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static int rtl8211f_config_init(struct phy_device *phydev)
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{
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+ struct rtl821x_priv *priv = phydev->priv;
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struct device *dev = &phydev->mdio.dev;
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u16 val_txdly, val_rxdly;
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u16 val;
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@@ -243,7 +274,15 @@ static int rtl8211f_config_init(struct p
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val_rxdly ? "enabled" : "disabled");
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}
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- return 0;
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+ ret = phy_modify_paged(phydev, 0xa43, RTL8211F_PHYCR2,
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+ RTL8211F_CLKOUT_EN, priv->phycr2);
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+ if (ret < 0) {
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+ dev_err(dev, "clkout configuration failed: %pe\n",
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+ ERR_PTR(ret));
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+ return ret;
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+ }
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+
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+ return genphy_soft_reset(phydev);
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}
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static int rtl821x_resume(struct phy_device *phydev)
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@@ -633,6 +672,7 @@ static struct phy_driver realtek_drvs[]
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}, {
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PHY_ID_MATCH_EXACT(0x001cc916),
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.name = "RTL8211F Gigabit Ethernet",
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+ .probe = rtl821x_probe,
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.config_init = &rtl8211f_config_init,
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.ack_interrupt = &rtl8211f_ack_interrupt,
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.config_intr = &rtl8211f_config_intr,
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