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.
Signed-off-by: Detlev Casanova <detlev.casanova@xxxxxxxxxxxxx>
---
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 3d99fd6664d7..b13dd0b3c99e 100644
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -12,6 +12,7 @@
#include <linux/phy.h>
#include <linux/module.h>
#include <linux/delay.h>
+#include <linux/clk.h>
#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;
--
2.39.3
