From 7300c9b574cc2b259ef112d34affa0671ae4810a Mon Sep 17 00:00:00 2001 From: Detlev Casanova Date: Mon, 5 Jun 2023 11:40:08 -0400 Subject: [PATCH] net: phy: realtek: Add optional external PHY clock In some cases, the PHY can use an external clock source instead of a crystal. Add an optional clock in the phy node to make sure that the clock source is enabled, if specified, before probing. Reviewed-by: Florian Fainelli Reviewed-by: Andrew Lunn Signed-off-by: Detlev Casanova Signed-off-by: David S. Miller --- drivers/net/phy/realtek.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c index 3d99fd6..b13dd0b 100644 --- a/drivers/net/phy/realtek.c +++ b/drivers/net/phy/realtek.c @@ -12,6 +12,7 @@ #include #include #include +#include #define RTL821x_PHYSR 0x11 #define RTL821x_PHYSR_DUPLEX BIT(13) @@ -80,6 +81,7 @@ struct rtl821x_priv { u16 phycr1; u16 phycr2; bool has_phycr2; + struct clk *clk; }; static int rtl821x_read_page(struct phy_device *phydev) @@ -103,6 +105,11 @@ static int rtl821x_probe(struct phy_device *phydev) if (!priv) return -ENOMEM; + priv->clk = devm_clk_get_optional_enabled(dev, NULL); + if (IS_ERR(priv->clk)) + return dev_err_probe(dev, PTR_ERR(priv->clk), + "failed to get phy clock\n"); + ret = phy_read_paged(phydev, 0xa43, RTL8211F_PHYCR1); if (ret < 0) return ret; -- 2.7.4