[PATCH 09/10] net: fsl_enetc_mdio: Add support for phy-supply property

[Alice Guo (OSS)]

From: Ye Li <ye.li at nxp.com>

Add support for the optional 'phy-supply' property in the ENETC MDIO
driver. This allows the driver to enable and manage the PHY's power
supply via the regulator framework when specified in device tree.

Signed-off-by: Ye Li <ye.li at nxp.com>
Reviewed-by: Peng Fan <peng.fan at nxp.com>
Signed-off-by: Alice Guo <alice.guo at nxp.com>
---
 drivers/net/fsl_enetc_mdio.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/net/fsl_enetc_mdio.c b/drivers/net/fsl_enetc_mdio.c
index c1d491f2c5a..3d76d92a62a 100644
--- a/drivers/net/fsl_enetc_mdio.c
+++ b/drivers/net/fsl_enetc_mdio.c
@@ -11,6 +11,8 @@
 #include <asm/io.h>
 #include <asm/processor.h>
 #include <miiphy.h>
+#include <linux/delay.h>
+#include <power/regulator.h>
 
 #include "fsl_enetc.h"
 
@@ -135,6 +137,8 @@ static int enetc_mdio_probe(struct udevice *dev)
 	struct pci_child_plat *pplat = dev_get_parent_plat(dev);
 	struct enetc_mdio_priv *priv = dev_get_priv(dev);
 	u16 cmd = PCI_COMMAND_MEMORY;
+	int ret;
+	struct udevice *supply = NULL;
 
 	priv->regs_base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0, 0, 0, PCI_REGION_TYPE, 0);
 	if (!priv->regs_base) {
@@ -144,6 +148,27 @@ static int enetc_mdio_probe(struct udevice *dev)
 
 	priv->regs_base += ENETC_MDIO_BASE;
 
+	if (CONFIG_IS_ENABLED(DM_REGULATOR)) {
+		ret = device_get_supply_regulator(dev, "phy-supply",
+						  &supply);
+		if (ret && ret != -ENOENT) {
+			printf("%s: device_get_supply_regulator failed: %d\n",
+			       __func__, ret);
+			return ret;
+		}
+
+		if (supply) {
+			regulator_set_enable(supply, false);
+			mdelay(100);
+
+			ret = regulator_set_enable_if_allowed(supply, true);
+			if (ret) {
+				printf("%s: Error enabling phy supply\n", dev->name);
+				return ret;
+			}
+		}
+	}
+
 	if (pplat->vendor == PCI_VENDOR_ID_PHILIPS)	/* i.MX95 */
 		cmd |= PCI_COMMAND_MASTER;
 

-- 
2.43.0