[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 <cont...@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