diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2025-01-08 16:47:33 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-01-10 17:51:00 -0800 |
| commit | cf337105ad38564d7855151889a7315da73119d0 (patch) | |
| tree | b3c857dc4be508cf2678b9b98c11ea47c35938ad /drivers/net | |
| parent | 7b24f164cf005b9649138ef6de94aaac49c9f3d1 (diff) | |
net: phy: add configuration of rx clock stop mode
Add a function to allow configuration of the PCS's clock stop enable
bit, used to configure whether the xMII receive clock can be stopped
during LPI mode.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Choong Yong Liang <yong.liang.choong@linux.intel.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1tVZDR-0002Jl-Ry@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/phy/phy.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index e4b04cdaa995..a4b9fcc2503a 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -1641,6 +1641,27 @@ void phy_mac_interrupt(struct phy_device *phydev) EXPORT_SYMBOL(phy_mac_interrupt); /** + * phy_eee_rx_clock_stop() - configure PHY receive clock in LPI + * @phydev: target phy_device struct + * @clk_stop_enable: flag to indicate whether the clock can be stopped + * + * Configure whether the PHY can disable its receive clock during LPI mode, + * See IEEE 802.3 sections 22.2.2.2, 35.2.2.10, and 45.2.3.1.4. + * + * Returns: 0 or negative error. + */ +int phy_eee_rx_clock_stop(struct phy_device *phydev, bool clk_stop_enable) +{ + /* Configure the PHY to stop receiving xMII + * clock while it is signaling LPI. + */ + return phy_modify_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, + MDIO_PCS_CTRL1_CLKSTOP_EN, + clk_stop_enable ? MDIO_PCS_CTRL1_CLKSTOP_EN : 0); +} +EXPORT_SYMBOL_GPL(phy_eee_rx_clock_stop); + +/** * phy_init_eee - init and check the EEE feature * @phydev: target phy_device struct * @clk_stop_enable: PHY may stop the clock during LPI @@ -1664,11 +1685,7 @@ int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable) return -EPROTONOSUPPORT; if (clk_stop_enable) - /* Configure the PHY to stop receiving xMII - * clock while it is signaling LPI. - */ - ret = phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, - MDIO_PCS_CTRL1_CLKSTOP_EN); + ret = phy_eee_rx_clock_stop(phydev, true); return ret < 0 ? ret : 0; } |