From 797ac07137d9ae8572008e21e6123a9ae17dae50 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Mon, 17 Feb 2014 13:34:02 -0800 Subject: [PATCH] net: phy: move PHY software reset to genphy_soft_reset As pointed out by Shaohui, this function is generic for 10/100/1000 PHYs, but 10G PHYs might have a slightly different reset sequence which prevents most of them from using this function. Move the BMCR_RESET based software resent sequence to genphy_soft_reset() in preparation for allowing PHY drivers to implement a soft_reset() callback. Reported-by: Shaohui Xie Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller --- drivers/net/phy/phy_device.c | 27 ++++++++++++++++++++++----- include/linux/phy.h | 1 + 2 files changed, 23 insertions(+), 5 deletions(-) diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index c2d778d06405..7c21b8214bb9 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -540,11 +540,7 @@ int phy_init_hw(struct phy_device *phydev) if (!phydev->drv || !phydev->drv->config_init) return 0; - ret = phy_write(phydev, MII_BMCR, BMCR_RESET); - if (ret < 0) - return ret; - - ret = phy_poll_reset(phydev); + ret = genphy_soft_reset(phydev); if (ret < 0) return ret; @@ -1045,6 +1041,27 @@ static int gen10g_read_status(struct phy_device *phydev) return 0; } +/** + * genphy_soft_reset - software reset the PHY via BMCR_RESET bit + * @phydev: target phy_device struct + * + * Description: Perform a software PHY reset using the standard + * BMCR_RESET bit and poll for the reset bit to be cleared. + * + * Returns: 0 on success, < 0 on failure + */ +int genphy_soft_reset(struct phy_device *phydev) +{ + int ret; + + ret = phy_write(phydev, MII_BMCR, BMCR_RESET); + if (ret < 0) + return ret; + + return phy_poll_reset(phydev); +} +EXPORT_SYMBOL(genphy_soft_reset); + static int genphy_config_init(struct phy_device *phydev) { int val; diff --git a/include/linux/phy.h b/include/linux/phy.h index f7fe54628424..bffe0ec1604f 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -666,6 +666,7 @@ int genphy_update_link(struct phy_device *phydev); int genphy_read_status(struct phy_device *phydev); int genphy_suspend(struct phy_device *phydev); int genphy_resume(struct phy_device *phydev); +int genphy_soft_reset(struct phy_device *phydev); void phy_driver_unregister(struct phy_driver *drv); void phy_drivers_unregister(struct phy_driver *drv, int n); int phy_driver_register(struct phy_driver *new_driver); -- 2.30.2