[PATCH v1] net: designware: support phy io micro voltage setting.

[Michael Chang]

Support phy io micro voltage setting for NPCM8XX rgmii
interface.

Signed-off-by: Michael Chang <zhang971090220 at gmail.com>
---
 drivers/net/designware.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index 94d8f1b4c0..0a1fff3872 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -741,6 +741,18 @@ int designware_eth_probe(struct udevice *dev)
 			puts("Error enabling phy supply\n");
 			return ret;
 		}
+#if IS_ENABLED(CONFIG_ARCH_NPCM8XX)
+		int phy_uv;
+
+		phy_uv = dev_read_u32_default(dev, "phy-supply-microvolt", 0);
+		if (phy_uv) {
+			ret = regulator_set_value(phy_supply, phy_uv);
+			if (ret) {
+				puts("Error setting phy voltage\n");
+				return ret;
+			}
+		}
+#endif
 	}
 #endif
 
-- 
2.34.1