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Subject[PATCH RFC 1/4] phy: Add provision for tuning phy.
Date
Some PHY controllers may need to tune PHY post-initialization,
so that the PHY consumers can call phy-tuning at appropriate
point of time.

Signed-off-by: vivek Gautam <gautam.vivek@samsung.com>
---
drivers/phy/phy-core.c | 20 ++++++++++++++++++++
include/linux/phy/phy.h | 7 +++++++
2 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 03cf8fb..68dbb90 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -239,6 +239,26 @@ out:
}
EXPORT_SYMBOL_GPL(phy_power_off);

+int phy_tune(struct phy *phy)
+{
+ int ret = -ENOTSUPP;
+
+ mutex_lock(&phy->mutex);
+ if (phy->ops->tune) {
+ ret = phy->ops->tune(phy);
+ if (ret < 0) {
+ dev_err(&phy->dev, "phy tuning failed --> %d\n", ret);
+ goto out;
+ }
+ }
+
+out:
+ mutex_unlock(&phy->mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_tune);
+
/**
* 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 6d72269..d3b32b0 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -34,6 +34,7 @@ struct phy_ops {
int (*exit)(struct phy *phy);
int (*power_on)(struct phy *phy);
int (*power_off)(struct phy *phy);
+ int (*tune)(struct phy *phy);
struct module *owner;
};

@@ -127,6 +128,7 @@ int phy_init(struct phy *phy);
int phy_exit(struct phy *phy);
int phy_power_on(struct phy *phy);
int phy_power_off(struct phy *phy);
+int phy_tune(struct phy *phy);
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);
@@ -199,6 +201,11 @@ static inline int phy_power_off(struct phy *phy)
return -ENOSYS;
}

+static inline int phy_tune(struct phy *phy)
+{
+ return -ENOSYS;
+}
+
static inline struct phy *phy_get(struct device *dev, const char *string)
{
return ERR_PTR(-ENOSYS);
--
1.7.6.5


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