[PATCH 7/9] usb: common: add API to get usb otg features from device tree

[Li Jun <jun.li@xxxxxxxxxxxxx>]

Check property of usb hardware to get if SRP, HNP and ADP is supported.

Signed-off-by: Li Jun <jun.li@xxxxxxxxxxxxx>
---
 drivers/usb/common/common.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
 include/linux/usb/of.h      | 15 +++++++++++++++
 2 files changed, 60 insertions(+)

diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
index b530fd4..9944bee 100644
--- a/drivers/usb/common/common.c
+++ b/drivers/usb/common/common.c
@@ -154,6 +154,51 @@ bool of_usb_host_tpl_support(struct device_node *np)
 	return false;
 }
 EXPORT_SYMBOL_GPL(of_usb_host_tpl_support);
+
+/**
+ * of_usb_otg_srp_support -  to get if otg srp is supported by the otg controller
+ * @np: Pointer to the given device_node
+ *
+ * The function gets if the otg port support SRP
+ */
+bool of_usb_otg_srp_support(struct device_node *np)
+{
+	if (of_find_property(np, "srp-support", NULL))
+		return true;
+
+	return false;
+}
+EXPORT_SYMBOL_GPL(of_usb_otg_srp_support);
+
+/**
+ * of_usb_otg_hnp_support -  to get if otg hnp is supported by the otg controller
+ * @np: Pointer to the given device_node
+ *
+ * The function gets if the otg port support HNP
+ */
+bool of_usb_otg_hnp_support(struct device_node *np)
+{
+	if (of_find_property(np, "hnp-support", NULL))
+		return true;
+
+	return false;
+}
+EXPORT_SYMBOL_GPL(of_usb_otg_hnp_support);
+
+/**
+ * of_usb_otg_adp_support -  to get if otg adp is supported by the otg controller
+ * @np: Pointer to the given device_node
+ *
+ * The function gets if the otg port support ADP
+ */
+bool of_usb_otg_adp_support(struct device_node *np)
+{
+	if (of_find_property(np, "adp-support", NULL))
+		return true;
+
+	return false;
+}
+EXPORT_SYMBOL_GPL(of_usb_otg_adp_support);
 #endif
 
 MODULE_LICENSE("GPL");
diff --git a/include/linux/usb/of.h b/include/linux/usb/of.h
index cfe0528..22f1ce2 100644
--- a/include/linux/usb/of.h
+++ b/include/linux/usb/of.h
@@ -15,6 +15,9 @@
 enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np);
 enum usb_device_speed of_usb_get_maximum_speed(struct device_node *np);
 bool of_usb_host_tpl_support(struct device_node *np);
+bool of_usb_otg_srp_support(struct device_node *np);
+bool of_usb_otg_hnp_support(struct device_node *np);
+bool of_usb_otg_adp_support(struct device_node *np);
 #else
 static inline enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np)
 {
@@ -30,6 +33,18 @@ static inline bool of_usb_host_tpl_support(struct device_node *np)
 {
 	return false;
 }
+static inline bool of_usb_otg_srp_support(struct device_node *np)
+{
+	return false;
+}
+static inline bool of_usb_otg_hnp_support(struct device_node *np)
+{
+	return false;
+}
+static inline bool of_usb_otg_adp_support(struct device_node *np)
+{
+	return false;
+}
 #endif
 
 #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_USB_SUPPORT)
-- 
1.9.1

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