[net-next RFC PATCH v2 05/11] net: phy: add support for driver specific PHY package probe/config

[Christian Marangi]

Add PHY driver specific function to probe and configure PHY package.
These function are run only once before the PHY probe and config_init.

They are used in conjunction with DT PHY package define for basic PHY
package implementation to setup and probe PHY package with simple
functions directly defined in the PHY driver struct.

Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
---
 drivers/net/phy/phy_device.c | 14 ++++++++++++++
 include/linux/phy.h          | 21 +++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 454dc8256e94..d7cfeb1011c1 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -1246,6 +1246,13 @@ int phy_init_hw(struct phy_device *phydev)
 	if (ret < 0)
 		return ret;
 
+	if (phydev->drv->phy_package_config_init_once &&
+	    phy_package_init_once(phydev)) {
+		ret = phydev->drv->phy_package_config_init_once(phydev);
+		if (ret < 0)
+			return ret;
+	}
+
 	if (phydev->drv->config_init) {
 		ret = phydev->drv->config_init(phydev);
 		if (ret < 0)
@@ -3370,6 +3377,13 @@ static int phy_probe(struct device *dev)
 	/* Deassert the reset signal */
 	phy_device_reset(phydev, 0);
 
+	if (phydev->drv->phy_package_probe_once &&
+	    phy_package_probe_once(phydev)) {
+		err = phydev->drv->phy_package_probe_once(phydev);
+		if (err)
+			goto out;
+	}
+
 	if (phydev->drv->probe) {
 		err = phydev->drv->probe(phydev);
 		if (err)
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 4ddf08e89624..677b5bceac45 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -923,12 +923,33 @@ struct phy_driver {
 	 */
 	int (*soft_reset)(struct phy_device *phydev);
 
+	/**
+	 * @phy_package_config_init_once: Driver specific PHY package
+	 *   config init call
+	 * @def: PHY device to use to probe PHY package
+	 *
+	 * Called to initialize the PHY package, including after
+	 * a reset.
+	 * Called BEFORE PHY config_init.
+	 */
+	int (*phy_package_config_init_once)(struct phy_device *dev);
+
 	/**
 	 * @config_init: Called to initialize the PHY,
 	 * including after a reset
 	 */
 	int (*config_init)(struct phy_device *phydev);
 
+	/**
+	 * @phy_package_probe_once: Driver specific PHY package probe
+	 * @def: PHY device to use to probe PHY package
+	 *
+	 * Called during discovery once per PHY package. Used to set
+	 * up device-specific PHY package structures, if any.
+	 * Called BEFORE PHY probe.
+	 */
+	int (*phy_package_probe_once)(struct phy_device *dev);
+
 	/**
 	 * @probe: Called during discovery.  Used to set
 	 * up device-specific structures, if any
-- 
2.40.1