Add generic PMA suspend and resume callback functions for C45 PHYs.
Signed-off-by: Radu Pirea (NXP OSS) <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
---
drivers/net/phy/phy-c45.c | 43 +++++++++++++++++++++++++++++++++++++++
include/linux/phy.h | 2 ++
2 files changed, 45 insertions(+)
diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c
index 91e3acb9e397..f4816b7d31b3 100644
--- a/drivers/net/phy/phy-c45.c
+++ b/drivers/net/phy/phy-c45.c
@@ -8,6 +8,49 @@
#include <linux/mii.h>
#include <linux/phy.h>
+/**
+ * genphy_c45_pma_can_sleep - checks if the PMA have sleep support
+ * @phydev: target phy_device struct
+ */
+static bool genphy_c45_pma_can_sleep(struct phy_device *phydev)
+{
+ int stat1;
+
+ stat1 = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_STAT1);
+ if (stat1 < 0)
+ return false;
+
+ return !!(stat1 & MDIO_STAT1_LPOWERABLE);
+}
+
+/**
+ * genphy_c45_pma_resume - wakes up the PMA module
+ * @phydev: target phy_device struct
+ */
+int genphy_c45_pma_resume(struct phy_device *phydev)
+{
+ if (!genphy_c45_pma_can_sleep(phydev))
+ return -EOPNOTSUPP;
+
+ return phy_clear_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1,
+ MDIO_CTRL1_LPOWER);
+}
+EXPORT_SYMBOL_GPL(genphy_c45_pma_resume);
+
+/**
+ * genphy_c45_pma_suspend - suspends the PMA module
+ * @phydev: target phy_device struct
+ */
+int genphy_c45_pma_suspend(struct phy_device *phydev)
+{
+ if (!genphy_c45_pma_can_sleep(phydev))
+ return -EOPNOTSUPP;
+
+ return phy_set_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1,
+ MDIO_CTRL1_LPOWER);
+}
+EXPORT_SYMBOL_GPL(genphy_c45_pma_suspend);
+
/**
* genphy_c45_pma_setup_forced - configures a forced speed
* @phydev: target phy_device struct
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 98fb441dd72e..e3d4d583463b 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1535,6 +1535,8 @@ int genphy_c45_pma_read_abilities(struct phy_device *phydev);
int genphy_c45_read_status(struct phy_device *phydev);
int genphy_c45_config_aneg(struct phy_device *phydev);
int genphy_c45_loopback(struct phy_device *phydev, bool enable);
+int genphy_c45_pma_resume(struct phy_device *phydev);
+int genphy_c45_pma_suspend(struct phy_device *phydev);
/* Generic C45 PHY driver */
extern struct phy_driver genphy_c45_driver;
--
2.31.1