padctl: t186: add APIs to control USB vbus

Add a pair of APIs to power on or off USB vbus when required. This is
currently being used in host controller driver when enabling host CDP
function.

Bug 200192880

Change-Id: I1b90ec766add24c84d57f3717ae51e78ad6f1cce
Signed-off-by: Mark Kuo <mkuo@nvidia.com>
Reviewed-on: http://git-master/r/1155976
Reviewed-by: Automatic_Commit_Validation_User
Tested-by: Jinyoung Park <jinyoungp@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Ashutosh Jha <ajha@nvidia.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinctrl-tegra186-padctl.c b/drivers/pinctrl/pinctrl-tegra186-padctl.c
index 4a6ea92f3..d914f36f8 100644
--- a/drivers/pinctrl/pinctrl-tegra186-padctl.c
+++ b/drivers/pinctrl/pinctrl-tegra186-padctl.c
@@ -3568,6 +3568,72 @@ bool tegra_phy_xusb_utmi_pad_secondary_charger_detect(struct phy *phy)
 }
 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_pad_secondary_charger_detect);
 
+int tegra_phy_xusb_utmi_vbus_power_on(struct phy *phy)
+{
+        struct tegra_padctl *padctl;
+        int port;
+        int rc;
+        int status;
+
+        if (!phy)
+                return -EINVAL;
+
+        padctl = phy_get_drvdata(phy);
+        port = utmi_phy_to_port(phy);
+
+        status = regulator_is_enabled(padctl->vbus[port]);
+        mutex_lock(&padctl->lock);
+        if (padctl->vbus[port]) {
+                rc = regulator_enable(padctl->vbus[port]);
+                if (rc) {
+                        dev_err(padctl->dev, "enable port %d vbus failed %d\n",
+                                port, rc);
+                        mutex_unlock(&padctl->lock);
+                        return rc;
+                }
+        }
+        mutex_unlock(&padctl->lock);
+        dev_info(padctl->dev, "%s: port %d regulator status: %d->%d\n",
+                 __func__, port, status,
+                 regulator_is_enabled(padctl->vbus[port]));
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_vbus_power_on);
+
+int tegra_phy_xusb_utmi_vbus_power_off(struct phy *phy)
+{
+        struct tegra_padctl *padctl;
+        int port;
+        int rc;
+        int status;
+
+        if (!phy)
+                return -EINVAL;
+
+        padctl = phy_get_drvdata(phy);
+        port = utmi_phy_to_port(phy);
+
+        status = regulator_is_enabled(padctl->vbus[port]);
+        mutex_lock(&padctl->lock);
+        if (padctl->vbus[port]) {
+                rc = regulator_disable(padctl->vbus[port]);
+                if (rc) {
+                        dev_err(padctl->dev, "disable port %d vbus failed %d\n",
+                                port, rc);
+                        mutex_unlock(&padctl->lock);
+                        return rc;
+                }
+        }
+        mutex_unlock(&padctl->lock);
+        dev_info(padctl->dev, "%s: port %d regulator status: %d->%d\n",
+                 __func__, port, status,
+                 regulator_is_enabled(padctl->vbus[port]));
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_vbus_power_off);
+
 MODULE_AUTHOR("JC Kuo <jckuo@nvidia.com>");
 MODULE_DESCRIPTION("Tegra 186 XUSB PADCTL driver");
 MODULE_LICENSE("GPL v2");