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Subject[PATCH v1] phy: Add max_link_rate as a PHY attribute along with get/set APIs
Date
The patch adds a pair of APIs that allow the generic PHY subsystem to
provide information on the maximum value of link rate supported by the
PHY. The PHY provider driver may use phy_set_max_link_rate() to set the
maximum link rate that the PHY supports. The controller driver may then
use phy_get_max_link_rate() to fetch the PHY link rate in order to
properly configure the controller.

Signed-off-by: Yuti Amonkar <yamonkar@cadence.com>
---
include/linux/phy/phy.h | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index bcee8eba62b3..a8b7b4a2b8de 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -119,6 +119,7 @@ struct phy_ops {
*/
struct phy_attrs {
u32 bus_width;
+ u32 max_link_rate;
enum phy_mode mode;
};

@@ -231,6 +232,16 @@ static inline void phy_set_bus_width(struct phy *phy, int bus_width)
{
phy->attrs.bus_width = bus_width;
}
+
+static inline int phy_get_max_link_rate(struct phy *phy)
+{
+ return phy->attrs.max_link_rate;
+}
+
+static inline void phy_set_max_link_rate(struct phy *phy, int link_rate)
+{
+ phy->attrs.max_link_rate = link_rate;
+}
struct phy *phy_get(struct device *dev, const char *string);
struct phy *phy_optional_get(struct device *dev, const char *string);
struct phy *devm_phy_get(struct device *dev, const char *string);
@@ -389,6 +400,16 @@ static inline void phy_set_bus_width(struct phy *phy, int bus_width)
return;
}

+static inline int phy_get_max_link_rate(struct phy *phy)
+{
+ return -ENOSYS;
+}
+
+static inline void phy_set_max_link_rate(struct phy *phy, int link_rate)
+{
+ return;
+}
+
static inline struct phy *phy_get(struct device *dev, const char *string)
{
return ERR_PTR(-ENOSYS);
--
2.26.1
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