In order to support platforms which has multiple PHY's (of same type) and
which has multiple USB controllers, a new design is adopted wherin the binding
information (between the PHY and the USB controller) should be passed to the
PHY library from platform specific file (board file).
So added a new API to pass the binding information.
Signed-off-by: Kishon Vijay Abraham I <kis...@ti.com>
---
drivers/usb/otg/otg.c | 37 +++++++++++++++++++++++++++++++++++++
include/linux/usb/phy.h | 22 ++++++++++++++++++++++
2 files changed, 59 insertions(+)
diff --git a/drivers/usb/otg/otg.c b/drivers/usb/otg/otg.c
index a30c041..8e756d9 100644
--- a/drivers/usb/otg/otg.c
+++ b/drivers/usb/otg/otg.c
@@ -18,6 +18,7 @@
#include <linux/usb/otg.h>
static LIST_HEAD(phy_list);
+static LIST_HEAD(phy_bind_list);
static DEFINE_SPINLOCK(phy_lock);
static struct usb_phy *__usb_find_phy(struct list_head *list,
@@ -201,6 +202,42 @@ void usb_remove_phy(struct usb_phy *x)
}
EXPORT_SYMBOL(usb_remove_phy);
+/**
+ * usb_bind_phy - bind the phy and the controller that uses the phy
+ * @dev_name: the device name of the device that will bind to the phy
+ * @index: index to specify the port number
+ * @phy_dev_name: the device name of the phy
+ *
+ * Fills the phy_bind structure with the dev_name and phy_dev_name. This will
+ * be used when the phy driver registers the phy and when the controller
+ * requests this phy.
+ *
+ * To be used by platform specific initialization code.
+ */
+int __init usb_bind_phy(const char *dev_name, u8 index,
+ const char *phy_dev_name)
+{
+ struct usb_phy_bind *phy_bind;
+ unsigned long flags;
+
+ phy_bind = kzalloc(sizeof(*phy_bind), GFP_KERNEL);
+ if (!phy_bind) {
+ pr_err("phy_bind(): No memory for phy_bind");
+ return -ENOMEM;
+ }
+
+ phy_bind->dev_name = dev_name;
+ phy_bind->phy_dev_name = phy_dev_name;
+ phy_bind->index = index;
+
+ spin_lock_irqsave(&phy_lock, flags);
+ list_add_tail(&phy_bind->list, &phy_bind_list);
+ spin_unlock_irqrestore(&phy_lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(usb_bind_phy);
+
const char *otg_state_string(enum usb_otg_state state)
{
switch (state) {
diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h
index a29ae1e..e7eb429 100644
--- a/include/linux/usb/phy.h
+++ b/include/linux/usb/phy.h
@@ -106,6 +106,21 @@ struct usb_phy {
enum usb_device_speed speed);
};
+/**
+ * struct usb_phy_bind - represent the binding for the phy
+ * @dev_name: the device name of the device that will bind to the phy
+ * @phy_dev_name: the device name of the phy
+ * @index: used if a single controller uses multiple phys
+ * @phy: reference to the phy
+ * @list: to maintain a linked list of the binding information
+ */
+struct usb_phy_bind {
+ const char *dev_name;
+ const char *phy_dev_name;
+ u8 index;
+ struct usb_phy *phy;
+ struct list_head list;
+};
/* for board-specific init logic */
extern int usb_add_phy(struct usb_phy *, enum usb_phy_type type);
@@ -151,6 +166,8 @@ extern struct usb_phy *devm_usb_get_phy(struct device *dev,
enum usb_phy_type type);
extern void usb_put_phy(struct usb_phy *);
extern void devm_usb_put_phy(struct device *dev, struct usb_phy *x);
+extern int usb_bind_phy(const char *dev_name, u8 index,
+ const char *phy_dev_name);
#else
static inline struct usb_phy *usb_get_phy(enum usb_phy_type type)
{
@@ -171,6 +188,11 @@ static inline void devm_usb_put_phy(struct device *dev,
struct usb_phy *x)
{
}
+static inline int usb_bind_phy(const char *dev_name, u8 index,
+ const char *phy_dev_name)
+{
+ return NULL;
+}
#endif
static inline int
--
1.7.9.5
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