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net: phy: realtek: add delay to resume path of certain internal PHY's

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Internal PHY's from RTL8168h up may not be instantly ready after calling
genphy_resume(). So far r8169 network driver adds the needed delay, but
better handle this in the PHY driver. The network driver may miss other
places where the PHY is resumed.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2020-04-18 22:08:51 +02:00 committed by David S. Miller
parent 6d92797716
commit fee698d62b
1 changed files with 13 additions and 2 deletions
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15
drivers/net/phy/realtek.c
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@ -11,6 +11,7 @@
#include <linux/bitops.h>
#include <linux/phy.h>
#include <linux/module.h>
#include <linux/delay.h>
#define RTL821x_PHYSR 0x11
#define RTL821x_PHYSR_DUPLEX BIT(13)
@ -526,6 +527,16 @@ static int rtl8125_match_phy_device(struct phy_device *phydev)
rtlgen_supports_2_5gbps(phydev);
}
static int rtlgen_resume(struct phy_device *phydev)
{
int ret = genphy_resume(phydev);
/* Internal PHY's from RTL8168h up may not be instantly ready */
msleep(20);
return ret;
}
static struct phy_driver realtek_drvs[] = {
{
PHY_ID_MATCH_EXACT(0x00008201),
@ -609,7 +620,7 @@ static struct phy_driver realtek_drvs[] = {
.match_phy_device = rtlgen_match_phy_device,
.read_status = rtlgen_read_status,
.suspend = genphy_suspend,
.resume = genphy_resume,
.resume = rtlgen_resume,
.read_page = rtl821x_read_page,
.write_page = rtl821x_write_page,
.read_mmd = rtlgen_read_mmd,
@ -621,7 +632,7 @@ static struct phy_driver realtek_drvs[] = {
.config_aneg = rtl8125_config_aneg,
.read_status = rtl8125_read_status,
.suspend = genphy_suspend,
.resume = genphy_resume,
.resume = rtlgen_resume,
.read_page = rtl821x_read_page,
.write_page = rtl821x_write_page,
.read_mmd = rtl8125_read_mmd,