diff mbox series

[v3,1/3] net: phy: realtek: Add optional external PHY clock

Message ID 20230605151953.48539-2-detlev.casanova@collabora.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series [v3,1/3] net: phy: realtek: Add optional external PHY clock | expand

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Context Check Description
netdev/series_format warning Series does not have a cover letter
netdev/tree_selection success Guessed tree name to be net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 8 this patch: 8
netdev/cc_maintainers success CCed 8 of 8 maintainers
netdev/build_clang success Errors and warnings before: 8 this patch: 8
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 8 this patch: 8
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 25 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Detlev Casanova June 5, 2023, 3:19 p.m. UTC 
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 <florian.fainelli@broadcom.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
---
 drivers/net/phy/realtek.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

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;