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| author | Javen Xu <javen_xu@realsil.com.cn> | 2026-07-28 15:31:02 +0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-07-31 18:22:48 -0700 |
| commit | 3b63c19e64f859f446c00da9d97e7a6cf79ee1ac (patch) | |
| tree | a77b16175be55edbfe945c61107217b2c42b6c36 | |
| parent | 1327e30657d283976c839f1bd24e2d3f68474097 (diff) | |
| download | linux-next-3b63c19e64f859f446c00da9d97e7a6cf79ee1ac.tar.gz linux-next-3b63c19e64f859f446c00da9d97e7a6cf79ee1ac.zip | |
net: phy: c45: add genphy_c45_pma_soft_reset()
Add a generic Clause 45 software reset helper. The helper sets the reset
bit in the PMA/PMD control register and waits until the bit is cleared by
hardware.
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Nicolai Buchwitz <nb@tipi-net.de>
Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
Link: https://patch.msgid.link/20260728073106.1515-2-javen_xu@realsil.com.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/phy/phy-c45.c | 22 | ||||
| -rw-r--r-- | include/linux/phy.h | 1 |
2 files changed, 23 insertions, 0 deletions
diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c index 126951741428..c1f817a59739 100644 --- a/drivers/net/phy/phy-c45.c +++ b/drivers/net/phy/phy-c45.c @@ -385,6 +385,28 @@ int genphy_c45_check_and_restart_aneg(struct phy_device *phydev, bool restart) EXPORT_SYMBOL_GPL(genphy_c45_check_and_restart_aneg); /** + * genphy_c45_pma_soft_reset - software reset the PHY via Clause 45 PMA/PMD control register + * @phydev: target phy_device struct + * + * Return: 0 on success, negative errno on failure. + */ +int genphy_c45_pma_soft_reset(struct phy_device *phydev) +{ + int ret, val; + + ret = phy_set_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1, + MDIO_CTRL1_RESET); + if (ret < 0) + return ret; + + return phy_read_mmd_poll_timeout(phydev, MDIO_MMD_PMAPMD, + MDIO_CTRL1, val, + !(val & MDIO_CTRL1_RESET), + 5000, 600000, true); +} +EXPORT_SYMBOL_GPL(genphy_c45_pma_soft_reset); + +/** * genphy_c45_aneg_done - return auto-negotiation complete status * @phydev: target phy_device struct * diff --git a/include/linux/phy.h b/include/linux/phy.h index 11092c3175b3..5f8d65868e0f 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -2317,6 +2317,7 @@ int genphy_c37_read_status(struct phy_device *phydev, bool *changed); /* Clause 45 PHY */ int genphy_c45_restart_aneg(struct phy_device *phydev); int genphy_c45_check_and_restart_aneg(struct phy_device *phydev, bool restart); +int genphy_c45_pma_soft_reset(struct phy_device *phydev); int genphy_c45_aneg_done(struct phy_device *phydev); int genphy_c45_read_link(struct phy_device *phydev); int genphy_c45_read_lpa(struct phy_device *phydev); |