[PATCH 6/6] net: sun8i-emac: Add support for active-low leds with internal PHY

[Paul Kocialkowski]

A device-tree property is already defined to indicate that the internal
PHY should be used with active-low leds, which corresponds to a
specific bit in the dedicated syscon register.

Add support for setting this bit when the property is present.

Signed-off-by: Paul Kocialkowski <contact at paulk.fr>
---
 drivers/net/sun8i_emac.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/net/sun8i_emac.c b/drivers/net/sun8i_emac.c
index 8433e7db2654..990a184e4b1f 100644
--- a/drivers/net/sun8i_emac.c
+++ b/drivers/net/sun8i_emac.c
@@ -176,6 +176,7 @@ struct sun8i_eth_pdata {
 	u32 reset_delays[3];
 	int tx_delay_ps;
 	int rx_delay_ps;
+	bool leds_active_low;
 };
 
 static int sun8i_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
@@ -287,7 +288,8 @@ static void sun8i_adjust_link(struct emac_eth_dev *priv,
 	writel(v, priv->mac_reg + EMAC_CTL0);
 }
 
-static u32 sun8i_emac_set_syscon_ephy(struct emac_eth_dev *priv, u32 reg)
+static u32 sun8i_emac_set_syscon_ephy(struct sun8i_eth_pdata *pdata,
+				      struct emac_eth_dev *priv, u32 reg)
 {
 	if (priv->use_internal_phy) {
 		/* H3 based SoC's that has an Internal 100MBit PHY
@@ -295,6 +297,10 @@ static u32 sun8i_emac_set_syscon_ephy(struct emac_eth_dev *priv, u32 reg)
 		*/
 		reg &= ~H3_EPHY_DEFAULT_MASK;
 		reg |=  H3_EPHY_DEFAULT_VALUE;
+
+		if (pdata->leds_active_low)
+			reg |= H3_EPHY_LED_POL;
+
 		reg |= priv->phyaddr << H3_EPHY_ADDR_SHIFT;
 		reg &= ~H3_EPHY_SHUTDOWN;
 		return reg | H3_EPHY_SELECT;
@@ -314,7 +320,7 @@ static int sun8i_emac_set_syscon(struct sun8i_eth_pdata *pdata,
 
 	reg = readl(priv->sysctl_reg);
 
-	reg = sun8i_emac_set_syscon_ephy(priv, reg);
+	reg = sun8i_emac_set_syscon_ephy(pdata, priv, reg);
 
 	reg &= ~(SC_ETCS_MASK | SC_EPIT);
 	if (priv->variant->support_rmii)
@@ -859,6 +865,10 @@ static int sun8i_emac_eth_of_to_plat(struct udevice *dev)
 		printf("%s: Invalid RX delay value %d\n", __func__,
 		       sun8i_pdata->rx_delay_ps);
 
+	sun8i_pdata->leds_active_low =
+		fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
+				"allwinner,leds-active-low");
+
 	if (fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
 			    "snps,reset-active-low"))
 		reset_flags |= GPIOD_ACTIVE_LOW;
-- 
2.49.0