net: phy: marvell: Implement led_blink_set()

The Marvell PHY can blink the LEDs, simple on/off. All LEDs blink at
the same rate, and the reset default is 84ms per blink, which is
around 12Hz.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/marvell.c

@@ -147,6 +147,8 @@
 #define MII_88E1318S_PHY_LED_FUNC		0x10
 #define MII_88E1318S_PHY_LED_FUNC_OFF		(0x8)
 #define MII_88E1318S_PHY_LED_FUNC_ON		(0x9)
+#define MII_88E1318S_PHY_LED_FUNC_HI_Z		(0xa)
+#define MII_88E1318S_PHY_LED_FUNC_BLINK		(0xb)
 #define MII_88E1318S_PHY_LED_TCR		0x12
 #define MII_88E1318S_PHY_LED_TCR_FORCE_INT	BIT(15)
 #define MII_88E1318S_PHY_LED_TCR_INTn_ENABLE	BIT(7)
@@ -2862,6 +2864,35 @@ static int m88e1318_led_brightness_set(struct phy_device *phydev,
 			       MII_88E1318S_PHY_LED_FUNC, reg);
 }
 
+static int m88e1318_led_blink_set(struct phy_device *phydev, u8 index,
+				  unsigned long *delay_on,
+				  unsigned long *delay_off)
+{
+	int reg;
+
+	reg = phy_read_paged(phydev, MII_MARVELL_LED_PAGE,
+			     MII_88E1318S_PHY_LED_FUNC);
+	if (reg < 0)
+		return reg;
+
+	switch (index) {
+	case 0:
+	case 1:
+	case 2:
+		reg &= ~(0xf << (4 * index));
+			reg |= MII_88E1318S_PHY_LED_FUNC_BLINK << (4 * index);
+			/* Reset default is 84ms */
+			*delay_on = 84 / 2;
+			*delay_off = 84 / 2;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return phy_write_paged(phydev, MII_MARVELL_LED_PAGE,
+			       MII_88E1318S_PHY_LED_FUNC, reg);
+}
+
 static int marvell_probe(struct phy_device *phydev)
 {
 	struct marvell_priv *priv;
@@ -3112,6 +3143,7 @@ static struct phy_driver marvell_drivers[] = {
 		.get_strings = marvell_get_strings,
 		.get_stats = marvell_get_stats,
 		.led_brightness_set = m88e1318_led_brightness_set,
+		.led_blink_set = m88e1318_led_blink_set,
 	},
 	{
 		.phy_id = MARVELL_PHY_ID_88E1145,
@@ -3219,6 +3251,7 @@ static struct phy_driver marvell_drivers[] = {
 		.cable_test_tdr_start = marvell_vct5_cable_test_tdr_start,
 		.cable_test_get_status = marvell_vct7_cable_test_get_status,
 		.led_brightness_set = m88e1318_led_brightness_set,
+		.led_blink_set = m88e1318_led_blink_set,
 	},
 	{
 		.phy_id = MARVELL_PHY_ID_88E1540,
@@ -3246,6 +3279,7 @@ static struct phy_driver marvell_drivers[] = {
 		.cable_test_tdr_start = marvell_vct5_cable_test_tdr_start,
 		.cable_test_get_status = marvell_vct7_cable_test_get_status,
 		.led_brightness_set = m88e1318_led_brightness_set,
+		.led_blink_set = m88e1318_led_blink_set,
 	},
 	{
 		.phy_id = MARVELL_PHY_ID_88E1545,
@@ -3273,6 +3307,7 @@ static struct phy_driver marvell_drivers[] = {
 		.cable_test_tdr_start = marvell_vct5_cable_test_tdr_start,
 		.cable_test_get_status = marvell_vct7_cable_test_get_status,
 		.led_brightness_set = m88e1318_led_brightness_set,
+		.led_blink_set = m88e1318_led_blink_set,
 	},
 	{
 		.phy_id = MARVELL_PHY_ID_88E3016,
@@ -3415,6 +3450,7 @@ static struct phy_driver marvell_drivers[] = {
 		.get_tunable = m88e1540_get_tunable,
 		.set_tunable = m88e1540_set_tunable,
 		.led_brightness_set = m88e1318_led_brightness_set,
+		.led_blink_set = m88e1318_led_blink_set,
 	},
 };