From 6813cc8cfdaf401476e1a007cec8ae338cefa573 Mon Sep 17 00:00:00 2001 From: Joakim Zhang Date: Tue, 8 Jun 2021 11:15:35 +0800 Subject: [PATCH] net: phy: realtek: add delay to fix RXC generation issue PHY will delay about 11.5ms to generate RXC clock when switching from power down to normal operation. Read/write registers would also cause RXC become unstable and stop for a while during this process. Realtek engineer suggests 15ms or more delay can workaround this issue. Signed-off-by: Joakim Zhang Signed-off-by: David S. Miller --- drivers/net/phy/realtek.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c index 79dc55bb4091..1b844a06fe72 100644 --- a/drivers/net/phy/realtek.c +++ b/drivers/net/phy/realtek.c @@ -410,6 +410,19 @@ static int rtl8211f_config_init(struct phy_device *phydev) return genphy_soft_reset(phydev); } +static int rtl821x_resume(struct phy_device *phydev) +{ + int ret; + + ret = genphy_resume(phydev); + if (ret < 0) + return ret; + + msleep(20); + + return 0; +} + static int rtl8211e_config_init(struct phy_device *phydev) { int ret = 0, oldpage; @@ -906,7 +919,7 @@ static struct phy_driver realtek_drvs[] = { .config_intr = &rtl8211f_config_intr, .handle_interrupt = rtl8211f_handle_interrupt, .suspend = genphy_suspend, - .resume = genphy_resume, + .resume = rtl821x_resume, .read_page = rtl821x_read_page, .write_page = rtl821x_write_page, }, { -- 2.11.0