[PATCH v2 1/3] phy: rockchip-inno-usb2: add support for phy-supply

[Vasily Khoruzhick]

PHY driver needs to enable PHY supply, otherwise port will
remain unpowered.

Signed-off-by: Vasily Khoruzhick <anars...@gmail.com>
---
v2: address check_patch.pl issues

 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 64 ++++++++++++++++++-
 1 file changed, 61 insertions(+), 3 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c 
b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index 55e1dbcfef..a859cd6f18 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -19,6 +19,7 @@
 #include <asm/io.h>
 #include <linux/iopoll.h>
 #include <asm/arch-rockchip/clock.h>
+#include <power/regulator.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -62,6 +63,10 @@ struct rockchip_usb2phy {
        void *reg_base;
        struct clk phyclk;
        const struct rockchip_usb2phy_cfg *phy_cfg;
+#if IS_ENABLED(CONFIG_DM_REGULATOR)
+       struct udevice *host_supply;
+       struct udevice *otg_supply;
+#endif
 };
 
 static inline int property_enable(void *reg_base,
@@ -86,12 +91,42 @@ struct rockchip_usb2phy_port_cfg *us2phy_get_port(struct 
phy *phy)
        return &phy_cfg->port_cfgs[phy->id];
 }
 
+#if IS_ENABLED(CONFIG_DM_REGULATOR)
+static int rockchip_usb2phy_regulator_set_enable(struct phy *phy, bool enable)
+{
+       struct udevice *parent = dev_get_parent(phy->dev);
+       struct rockchip_usb2phy *priv = dev_get_priv(parent);
+       struct udevice *supply;
+       int ret = 0;
+
+       if (phy->id == USB2PHY_PORT_HOST)
+               supply = priv->host_supply;
+       else
+               supply = priv->otg_supply;
+
+       if (supply)
+               ret = regulator_set_enable(supply, enable);
+
+       return ret;
+}
+#else
+static int rockchip_usb2phy_regulator_set_enable(struct phy *phy, bool enable)
+{
+       return 0;
+}
+#endif
+
 static int rockchip_usb2phy_power_on(struct phy *phy)
 {
        struct udevice *parent = dev_get_parent(phy->dev);
        struct rockchip_usb2phy *priv = dev_get_priv(parent);
        const struct rockchip_usb2phy_port_cfg *port_cfg = us2phy_get_port(phy);
 
+       int ret = rockchip_usb2phy_regulator_set_enable(phy, true);
+
+       if (ret)
+               return ret;
+
        property_enable(priv->reg_base, &port_cfg->phy_sus, false);
 
        /* waiting for the utmi_clk to become stable */
@@ -108,6 +143,11 @@ static int rockchip_usb2phy_power_off(struct phy *phy)
 
        property_enable(priv->reg_base, &port_cfg->phy_sus, true);
 
+       int ret = rockchip_usb2phy_regulator_set_enable(phy, false);
+
+       if (ret)
+               return ret;
+
        return 0;
 }
 
@@ -149,13 +189,31 @@ static int rockchip_usb2phy_of_xlate(struct phy *phy,
                                     struct ofnode_phandle_args *args)
 {
        const char *name = phy->dev->name;
+       struct udevice *parent = dev_get_parent(phy->dev);
+       struct rockchip_usb2phy *priv = dev_get_priv(parent);
+#if IS_ENABLED(CONFIG_DM_REGULATOR)
+       struct udevice *supply;
+       int ret = device_get_supply_regulator(phy->dev, "phy-supply", &supply);
+
+       if (ret && ret != -ENOENT) {
+               pr_err("Failed to get PHY regulator\n");
+               return ret;
+       }
+#endif
 
-       if (!strcasecmp(name, "host-port"))
+       if (!strcasecmp(name, "host-port")) {
                phy->id = USB2PHY_PORT_HOST;
-       else if (!strcasecmp(name, "otg-port"))
+#if IS_ENABLED(CONFIG_DM_REGULATOR)
+               priv->host_supply = supply;
+#endif
+       } else if (!strcasecmp(name, "otg-port")) {
                phy->id = USB2PHY_PORT_OTG;
-       else
+#if IS_ENABLED(CONFIG_DM_REGULATOR)
+               priv->otg_supply = supply;
+#endif
+       } else {
                dev_err(phy->dev, "improper %s device\n", name);
+       }
 
        return 0;
 }
-- 
2.39.2