[net-next RFC PATCH 10/14] net: phy: add support for PHY package MMD read/write

Christian Marangi
2023-11-20T13:51:29Z

Some PHY in PHY package may require to read/write MMD regs to correctly
configure the PHY package.

Add support for these additional required function in both lock and no
lock variant.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
include/linux/phy.h | 72 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 72 insertions(+)

diff --git a/include/linux/phy.h b/include/linux/phy.h
index dd2381652dd1..90bfaa36689f 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -2110,6 +2110,78 @@ static inline int __phy_package_write(struct phy_device *phydev,
return __mdiobus_write(phydev->mdio.bus, addr, regnum, val);
}

+static inline int phy_package_read_mmd(struct phy_device *phydev,
+ int global_phy_index, int devad, u32 regnum)
+{
+ struct phy_package_shared *shared = phydev->shared;
+ struct mii_bus *bus = phydev->mdio.bus;
+ int addr, val;
+
+ if (!shared || global_phy_index > shared->addrs_num - 1)
+ return -EIO;
+
+ addr = shared->addrs[global_phy_index];
+
+ phy_lock_mdio_bus(phydev);
+ mmd_phy_indirect(bus, addr, devad, regnum);
+ val = __mdiobus_read(bus, addr, MII_MMD_DATA);
+ phy_unlock_mdio_bus(phydev);
+
+ return val;
+}
+
+static inline int __phy_package_read_mmd(struct phy_device *phydev,
+ int global_phy_index, int devad, u32 regnum)
+{
+ struct phy_package_shared *shared = phydev->shared;
+ struct mii_bus *bus = phydev->mdio.bus;
+ int addr;
+
+ if (!shared || global_phy_index > shared->addrs_num - 1)
+ return -EIO;
+
+ addr = shared->addrs[global_phy_index];
+ mmd_phy_indirect(bus, addr, devad, regnum);
+ return __mdiobus_read(bus, addr, MII_MMD_DATA);
+}
+
+static inline int phy_package_write_mmd(struct phy_device *phydev,
+ int global_phy_index, int devad,
+ u32 regnum, u16 val)
+{
+ struct phy_package_shared *shared = phydev->shared;
+ struct mii_bus *bus = phydev->mdio.bus;
+ int addr, ret;
+
+ if (!shared || global_phy_index > shared->addrs_num - 1)
+ return -EIO;
+
+ addr = shared->addrs[global_phy_index];
+
+ phy_lock_mdio_bus(phydev);
+ mmd_phy_indirect(bus, addr, devad, regnum);
+ ret = __mdiobus_write(bus, addr, MII_MMD_DATA, val);
+ phy_unlock_mdio_bus(phydev);
+
+ return ret;
+}
+
+static inline int __phy_package_write_mmd(struct phy_device *phydev,
+ int global_phy_index, int devad,
+ u32 regnum, u16 val)
+{
+ struct phy_package_shared *shared = phydev->shared;
+ struct mii_bus *bus = phydev->mdio.bus;
+ int addr;
+
+ if (!shared || global_phy_index > shared->addrs_num - 1)
+ return -EIO;
+
+ addr = shared->addrs[global_phy_index];
+ mmd_phy_indirect(bus, addr, devad, regnum);
+ return __mdiobus_write(bus, addr, MII_MMD_DATA, val);
+}
+
static inline bool __phy_package_set_once(struct phy_device *phydev,
unsigned int b)
{
--
2.40.1