Subject: [PATCH v3 net-next 2/2] net: phy: micrel: Adding LED feature for LAN8814 PHY

From: Divya Koppera <[email-masked]>
Date: Fri, 1 Jul 2022 09:27:09 +0530

LED support for extended mode where
LED 1: Enhanced Mode 5 (10M/1000M/Activity)
LED 2: Enhanced Mode 4 (100M/1000M/Activity)

By default it supports KSZ9031 LED mode

Signed-off-by: Divya Koppera <[email-masked]>
---
v2 -> v3:
- Fixed compilation issues

v1 -> v2:
- No changes
---
 drivers/net/phy/micrel.c | 73 ++++++++++++++++++++++++++++++----------
 1 file changed, 56 insertions(+), 17 deletions(-)

diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 22139901f01c..e78d0bf69bc3 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -209,6 +209,9 @@
 #define PTP_TSU_INT_STS_PTP_RX_TS_OVRFL_INT_	BIT(1)
 #define PTP_TSU_INT_STS_PTP_RX_TS_EN_		BIT(0)
 
+#define LAN8814_LED_CTRL_1			0x0
+#define LAN8814_LED_CTRL_1_KSZ9031_LED_MODE_	BIT(6)
+
 /* PHY Control 1 */
 #define MII_KSZPHY_CTRL_1			0x1e
 #define KSZ8081_CTRL1_MDIX_STAT			BIT(4)
@@ -308,6 +311,10 @@ struct kszphy_priv {
 	u64 stats[ARRAY_SIZE(kszphy_hw_stats)];
 };
 
+static const struct kszphy_type lan8814_type = {
+	.led_mode_reg		= ~LAN8814_LED_CTRL_1,
+};
+
 static const struct kszphy_type ksz8021_type = {
 	.led_mode_reg		= MII_KSZPHY_CTRL_2,
 	.has_broadcast_disable	= true,
@@ -1688,6 +1695,30 @@ static int kszphy_suspend(struct phy_device *phydev)
 	return genphy_suspend(phydev);
 }
 
+static void kszphy_parse_led_mode(struct phy_device *phydev)
+{
+	const struct kszphy_type *type = phydev->drv->driver_data;
+	const struct device_node *np = phydev->mdio.dev.of_node;
+	struct kszphy_priv *priv = phydev->priv;
+	int ret;
+
+	if (type && type->led_mode_reg) {
+		ret = of_property_read_u32(np, "micrel,led-mode",
+					   &priv->led_mode);
+
+		if (ret)
+			priv->led_mode = -1;
+
+		if (priv->led_mode > 3) {
+			phydev_err(phydev, "invalid led mode: 0x%02x\n",
+				   priv->led_mode);
+			priv->led_mode = -1;
+		}
+	} else {
+		priv->led_mode = -1;
+	}
+}
+
 static int kszphy_resume(struct phy_device *phydev)
 {
 	int ret;
@@ -1720,7 +1751,6 @@ static int kszphy_probe(struct phy_device *phydev)
 	const struct device_node *np = phydev->mdio.dev.of_node;
 	struct kszphy_priv *priv;
 	struct clk *clk;
-	int ret;
 
 	priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -1730,20 +1760,7 @@ static int kszphy_probe(struct phy_device *phydev)
 
 	priv->type = type;
 
-	if (type && type->led_mode_reg) {
-		ret = of_property_read_u32(np, "micrel,led-mode",
-				&priv->led_mode);
-		if (ret)
-			priv->led_mode = -1;
-
-		if (priv->led_mode > 3) {
-			phydev_err(phydev, "invalid led mode: 0x%02x\n",
-				   priv->led_mode);
-			priv->led_mode = -1;
-		}
-	} else {
-		priv->led_mode = -1;
-	}
+	kszphy_parse_led_mode(phydev);
 
 	clk = devm_clk_get(&phydev->mdio.dev, "rmii-ref");
 	/* NOTE: clk may be NULL if building without CONFIG_HAVE_CLK */
@@ -2815,8 +2832,23 @@ static int lan8814_ptp_probe_once(struct phy_device *phydev)
 	return 0;
 }
 
+static void lan8814_setup_led(struct phy_device *phydev, int val)
+{
+	int temp;
+
+	temp = lanphy_read_page_reg(phydev, 5, LAN8814_LED_CTRL_1);
+
+	if (val)
+		temp |= LAN8814_LED_CTRL_1_KSZ9031_LED_MODE_;
+	else
+		temp &= ~LAN8814_LED_CTRL_1_KSZ9031_LED_MODE_;
+
+	lanphy_write_page_reg(phydev, 5, LAN8814_LED_CTRL_1, temp);
+}
+
 static int lan8814_config_init(struct phy_device *phydev)
 {
+	struct kszphy_priv *lan8814 = phydev->priv;
 	int val;
 
 	/* Reset the PHY */
@@ -2835,6 +2867,9 @@ static int lan8814_config_init(struct phy_device *phydev)
 	val |= LAN8814_ALIGN_TX_A_B_SWAP;
 	lanphy_write_page_reg(phydev, 2, LAN8814_ALIGN_SWAP, val);
 
+	if (lan8814->led_mode >= 0)
+		lan8814_setup_led(phydev, lan8814->led_mode);
+
 	return 0;
 }
 
@@ -2855,6 +2890,7 @@ static int lan8814_release_coma_mode(struct phy_device *phydev)
 
 static int lan8814_probe(struct phy_device *phydev)
 {
+	const struct kszphy_type *type = phydev->drv->driver_data;
 	struct kszphy_priv *priv;
 	u16 addr;
 	int err;
@@ -2863,10 +2899,12 @@ static int lan8814_probe(struct phy_device *phydev)
 	if (!priv)
 		return -ENOMEM;
 
-	priv->led_mode = -1;
-
 	phydev->priv = priv;
 
+	priv->type = type;
+
+	kszphy_parse_led_mode(phydev);
+
 	/* Strap-in value for PHY address, below register read gives starting
 	 * phy address value
 	 */
@@ -3068,6 +3106,7 @@ static struct phy_driver ksphy_driver[] = {
 	.phy_id_mask	= MICREL_PHY_ID_MASK,
 	.name		= "Microchip INDY Gigabit Quad PHY",
 	.config_init	= lan8814_config_init,
+	.driver_data	= &lan8814_type,
 	.probe		= lan8814_probe,
 	.soft_reset	= genphy_soft_reset,
 	.read_status	= ksz9031_read_status,
-- 
2.17.1