[RESEND PATCH v7 1/4] phy: Add reset callback

Randy Li
2016-09-09T18:59:37Z

The only use for this is for solving a hardware design problem in
usb of Rockchip RK3288.

Signed-off-by: Randy Li <ayaka-xPW3/0Ywev/iB9QmIjCX8w@public.gmane.org>
---
drivers/phy/phy-core.c | 14 ++++++++++++++
include/linux/phy/phy.h | 3 +++
2 files changed, 17 insertions(+)

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 8eca906..32e838d 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -357,6 +357,20 @@ int phy_set_mode(struct phy *phy, enum phy_mode mode)
}
EXPORT_SYMBOL_GPL(phy_set_mode);

+int phy_reset(struct phy *phy)
+{
+ int ret;
+ if (!phy || !phy->ops->reset)
+ return 0;
+
+ mutex_lock(&phy->mutex);
+ ret = phy->ops->reset(phy);
+ mutex_unlock(&phy->mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_reset);
+
/**
* _of_phy_get() - lookup and obtain a reference to a phy by phandle
* @np: device_node for which to get the phy
diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index f08b672..7978df6 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -36,6 +36,7 @@ enum phy_mode {
* @power_on: powering on the phy
* @power_off: powering off the phy
* @set_mode: set the mode of the phy
+ * @reset: reseting the phy
* @owner: the module owner containing the ops
*/
struct phy_ops {
@@ -44,6 +45,7 @@ struct phy_ops {
int (*power_on)(struct phy *phy);
int (*power_off)(struct phy *phy);
int (*set_mode)(struct phy *phy, enum phy_mode mode);
+ int (*reset)(struct phy *phy);
struct module *owner;
};

@@ -136,6 +138,7 @@ int phy_exit(struct phy *phy);
int phy_power_on(struct phy *phy);
int phy_power_off(struct phy *phy);
int phy_set_mode(struct phy *phy, enum phy_mode mode);
+int phy_reset(struct phy *phy);
static inline int phy_get_bus_width(struct phy *phy)
{
return phy->attrs.bus_width;
--
2.7.4

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