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Subject[PATCH RESEND v10 1/4] PHY: Add function set_speed to generic PHY framework
Date
This patch adds function set_speed to the generic PHY framework operation
structure. This function can be called to instruct the PHY underlying layer
at specified lane to configure for specified speed in hertz.

Signed-off-by: Loc Ho <lho@apm.com>
---
drivers/phy/phy-core.c | 21 +++++++++++++++++++++
include/linux/phy/phy.h | 8 ++++++++
2 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 645c867..44f2f63 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -257,6 +257,27 @@ int phy_power_off(struct phy *phy)
}
EXPORT_SYMBOL_GPL(phy_power_off);

+int phy_set_speed(struct phy *phy, int lane, u64 speed)
+{
+ int ret = -ENOTSUPP;
+
+ mutex_lock(&phy->mutex);
+ if (phy->ops->set_speed) {
+ ret = phy->ops->set_speed(phy, lane, speed);
+ if (ret < 0) {
+ dev_err(&phy->dev, "phy set speed failed --> %d\n",
+ ret);
+ goto out;
+ }
+ }
+
+out:
+ mutex_unlock(&phy->mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_set_speed);
+
/**
* of_phy_get() - lookup and obtain a reference to a phy by phandle
* @dev: device that requests this phy
diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index e273e5a..4eb589c 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -27,6 +27,7 @@ struct phy;
* @exit: operation to be performed while exiting
* @power_on: powering on the phy
* @power_off: powering off the phy
+ * @set_speed: set operation speed in hz
* @owner: the module owner containing the ops
*/
struct phy_ops {
@@ -34,6 +35,7 @@ struct phy_ops {
int (*exit)(struct phy *phy);
int (*power_on)(struct phy *phy);
int (*power_off)(struct phy *phy);
+ int (*set_speed)(struct phy *phy, int lane, u64 speed);
struct module *owner;
};

@@ -145,6 +147,7 @@ static inline void phy_set_bus_width(struct phy *phy, int bus_width)
{
phy->attrs.bus_width = bus_width;
}
+int phy_set_speed(struct phy *phy, int lane, u64 speed);
struct phy *phy_get(struct device *dev, const char *string);
struct phy *devm_phy_get(struct device *dev, const char *string);
void phy_put(struct phy *phy);
@@ -227,6 +230,11 @@ static inline void phy_set_bus_width(struct phy *phy, int bus_width)
return;
}

+static inline int phy_set_speed(struct phy *phy, int lane, u64 speed)
+{
+ return -ENOSYS;
+}
+
static inline struct phy *phy_get(struct device *dev, const char *string)
{
return ERR_PTR(-ENOSYS);
--
1.5.5


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