iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: phy: dp83tg720: wake up PHYs in managed mode

Browse Source 
In case this PHY is bootstrapped for managed mode, we need to manually
wake it. Otherwise no link will be detected.

Cc: stable@vger.kernel.org
Fixes: cb80ee2f9b ("net: phy: Add support for the DP83TG720S Ethernet PHY")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20240614094516.1481231-1-o.rempel@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Oleksij Rempel 2024-06-14 11:45:15 +02:00 committed by Jakub Kicinski
parent e2b447c9a1
commit cd6f12e173
1 changed files with 15 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/net/phy/dp83tg720.c
View File

@ -17,6 +17,11 @@
#define DP83TG720S_PHY_RESET 0x1f
#define DP83TG720S_HW_RESET BIT(15)
#define DP83TG720S_LPS_CFG3 0x18c
/* Power modes are documented as bit fields but used as values */
/* Power Mode 0 is Normal mode */
#define DP83TG720S_LPS_CFG3_PWR_MODE_0 BIT(0)
#define DP83TG720S_RGMII_DELAY_CTRL 0x602
/* In RGMII mode, Enable or disable the internal delay for RXD */
#define DP83TG720S_RGMII_RX_CLK_SEL BIT(1)
@ -154,10 +159,17 @@ static int dp83tg720_config_init(struct phy_device *phydev)
*/
usleep_range(1000, 2000);
if (phy_interface_is_rgmii(phydev))
return dp83tg720_config_rgmii_delay(phydev);
if (phy_interface_is_rgmii(phydev)) {
ret = dp83tg720_config_rgmii_delay(phydev);
if (ret)
return ret;
}
return 0;
/* In case the PHY is bootstrapped in managed mode, we need to
* wake it.
*/
return phy_write_mmd(phydev, MDIO_MMD_VEND2, DP83TG720S_LPS_CFG3,
DP83TG720S_LPS_CFG3_PWR_MODE_0);
}
static struct phy_driver dp83tg720_driver[] = {