arm: mvebu: turris_mox: start blinking PHY LEDs when entering rescue

Configure blinking on ethernet PHY LEDs on the MOX A board when entering
rescue mode via reset button.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/board/CZ.NIC/turris_mox/turris_mox.c b/board/CZ.NIC/turris_mox/turris_mox.c
index a78f33661e7cf9e0e6f6c6b5cb0e3ff4a13ee8c5..44c272c7cb86fe2b0e4f7daf91391f2f04eca849 100644 (file)
--- a/board/CZ.NIC/turris_mox/turris_mox.c
+++ b/board/CZ.NIC/turris_mox/turris_mox.c
@@ -377,6 +377,38 @@ int misc_init_r(void)
        return 0;
 }
 
+static void mox_phy_modify(struct phy_device *phydev, int page, int reg,
+                          u16 mask, u16 set)
+{
+       int val;
+
+       val = phydev->drv->readext(phydev, MDIO_DEVAD_NONE, page, reg);
+       val &= ~mask;
+       val |= set;
+       phydev->drv->writeext(phydev, MDIO_DEVAD_NONE, page, reg, val);
+}
+
+static void mox_phy_leds_start_blinking(void)
+{
+       struct phy_device *phydev;
+       struct mii_dev *bus;
+
+       bus = miiphy_get_dev_by_name("neta@30000");
+       if (!bus) {
+               printf("Cannot get MDIO bus device!\n");
+               return;
+       }
+
+       phydev = phy_find_by_mask(bus, BIT(1), PHY_INTERFACE_MODE_RGMII);
+       if (!phydev) {
+               printf("Cannot get ethernet PHY!\n");
+               return;
+       }
+
+       mox_phy_modify(phydev, 3, 0x12, 0x700, 0x400);
+       mox_phy_modify(phydev, 3, 0x10, 0xff, 0xbb);
+}
+
 static bool read_reset_button(void)
 {
        struct udevice *button, *led;
@@ -424,6 +456,9 @@ static void handle_reset_button(void)
                /* Ensure bootcmd_rescue is used by distroboot */
                env_set("boot_targets", "rescue");
 
+               /* start blinking PHY LEDs */
+               mox_phy_leds_start_blinking();
+
                printf("RESET button was pressed, overwriting boot_targets!\n");
        } else {
                /*