[PATCH 4/8] phy: tegra: xusb: add sleepwalk and suspend/resume

[JC Kuo <jckuo@nvidia.com>]

This commit adds sleepwalk/wake and suspend/resume interfaces
to Tegra XUSB PHY driver.

Signed-off-by: JC Kuo <jckuo@nvidia.com>
---
 drivers/phy/tegra/xusb.c       | 78 ++++++++++++++++++++++++++++++++++
 drivers/phy/tegra/xusb.h       |  8 ++++
 include/linux/phy/tegra/xusb.h | 12 ++++++
 3 files changed, 98 insertions(+)

diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
index 7fbba53f6097..14461d59b947 100644
--- a/drivers/phy/tegra/xusb.c
+++ b/drivers/phy/tegra/xusb.c
@@ -975,10 +975,36 @@ static int tegra_xusb_padctl_remove(struct platform_device *pdev)
 	return err;
 }
 
+static int tegra_xusb_padctl_suspend_noirq(struct device *dev)
+{
+	struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
+
+	if (padctl->soc->ops->suspend_noirq)
+		return padctl->soc->ops->suspend_noirq(padctl);
+
+	return 0;
+}
+
+static int tegra_xusb_padctl_resume_noirq(struct device *dev)
+{
+	struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
+
+	if (padctl->soc->ops->resume_noirq)
+		return padctl->soc->ops->resume_noirq(padctl);
+
+	return 0;
+}
+
+static const struct dev_pm_ops tegra_xusb_padctl_pm_ops = {
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_xusb_padctl_suspend_noirq,
+				      tegra_xusb_padctl_resume_noirq)
+};
+
 static struct platform_driver tegra_xusb_padctl_driver = {
 	.driver = {
 		.name = "tegra-xusb-padctl",
 		.of_match_table = tegra_xusb_padctl_of_match,
+		.pm = &tegra_xusb_padctl_pm_ops,
 	},
 	.probe = tegra_xusb_padctl_probe,
 	.remove = tegra_xusb_padctl_remove,
@@ -1045,6 +1071,58 @@ int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl,
 }
 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle);
 
+int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl,
+					   struct phy *phy,
+					   enum usb_device_speed speed)
+{
+	if (padctl->soc->ops->phy_sleepwalk)
+		return padctl->soc->ops->phy_sleepwalk(padctl, phy, true,
+						       speed);
+
+	return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_sleepwalk);
+
+int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl,
+					    struct phy *phy)
+{
+	if (padctl->soc->ops->phy_sleepwalk)
+		return padctl->soc->ops->phy_sleepwalk(padctl, phy, false, 0);
+
+	return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_sleepwalk);
+
+int tegra_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl,
+				      struct phy *phy)
+{
+	if (padctl->soc->ops->phy_wake)
+		return padctl->soc->ops->phy_wake(padctl, phy, true);
+
+	return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_wake);
+
+int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl,
+				       struct phy *phy)
+{
+	if (padctl->soc->ops->phy_wake)
+		return padctl->soc->ops->phy_wake(padctl, phy, false);
+
+	return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_wake);
+
+int tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl,
+					   struct phy *phy)
+{
+	if (padctl->soc->ops->remote_wake_detected)
+		return padctl->soc->ops->remote_wake_detected(phy);
+
+	return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_remote_wake_detected);
+
 int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
 					   unsigned int port, bool enable)
 {
diff --git a/drivers/phy/tegra/xusb.h b/drivers/phy/tegra/xusb.h
index 1bfe14b2a274..9482914536ac 100644
--- a/drivers/phy/tegra/xusb.h
+++ b/drivers/phy/tegra/xusb.h
@@ -11,6 +11,7 @@
 #include <linux/mutex.h>
 #include <linux/workqueue.h>
 
+#include <linux/usb/ch9.h>
 #include <linux/usb/otg.h>
 
 /* legacy entry points for backwards-compatibility */
@@ -368,12 +369,19 @@ struct tegra_xusb_padctl_ops {
 			 const struct tegra_xusb_padctl_soc *soc);
 	void (*remove)(struct tegra_xusb_padctl *padctl);
 
+	int (*suspend_noirq)(struct tegra_xusb_padctl *padctl);
+	int (*resume_noirq)(struct tegra_xusb_padctl *padctl);
 	int (*usb3_save_context)(struct tegra_xusb_padctl *padctl,
 				 unsigned int index);
 	int (*hsic_set_idle)(struct tegra_xusb_padctl *padctl,
 			     unsigned int index, bool idle);
 	int (*usb3_set_lfps_detect)(struct tegra_xusb_padctl *padctl,
 				    unsigned int index, bool enable);
+	int (*phy_sleepwalk)(struct tegra_xusb_padctl *padctl, struct phy *phy,
+			     bool enable, enum usb_device_speed speed);
+	int (*phy_wake)(struct tegra_xusb_padctl *padctl, struct phy *phy,
+			bool enable);
+	int (*remote_wake_detected)(struct phy *phy);
 };
 
 struct tegra_xusb_padctl_soc {
diff --git a/include/linux/phy/tegra/xusb.h b/include/linux/phy/tegra/xusb.h
index ee59562c8354..2fb12e3baaee 100644
--- a/include/linux/phy/tegra/xusb.h
+++ b/include/linux/phy/tegra/xusb.h
@@ -8,6 +8,7 @@
 
 struct tegra_xusb_padctl;
 struct device;
+enum usb_device_speed;
 
 struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev);
 void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl);
@@ -18,5 +19,16 @@ int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl,
 				    unsigned int port, bool idle);
 int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
 					   unsigned int port, bool enable);
+int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl,
+					   struct phy *phy,
+					   enum usb_device_speed speed);
+int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl,
+					   struct phy *phy);
+int tegra_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl,
+				      struct phy *phy);
+int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl,
+				       struct phy *phy);
+int tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl,
+					struct phy *phy);
 
 #endif /* PHY_TEGRA_XUSB_H */
-- 
2.17.1