net: mediatek: add support for MediaTek MT7621 SoC

This patch adds GMAC support for MediaTek MT7621 SoC.
MT7621 has the same GMAC/Switch configuration as MT7623.

Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>

diff --git a/drivers/net/mtk_eth.c b/drivers/net/mtk_eth.c
index ac1e8ab..4fe7ee0 100644 (file)
--- a/drivers/net/mtk_eth.c
+++ b/drivers/net/mtk_eth.c
@@ -145,7 +145,8 @@ enum mtk_switch {
 enum mtk_soc {
        SOC_MT7623,
        SOC_MT7629,
-       SOC_MT7622
+       SOC_MT7622,
+       SOC_MT7621
 };
 
 struct mtk_eth_priv {
@@ -675,12 +676,18 @@ static int mt7530_pad_clk_setup(struct mtk_eth_priv *priv, int mode)
 static int mt7530_setup(struct mtk_eth_priv *priv)
 {
        u16 phy_addr, phy_val;
-       u32 val;
+       u32 val, txdrv;
        int i;
 
-       /* Select 250MHz clk for RGMII mode */
-       mtk_ethsys_rmw(priv, ETHSYS_CLKCFG0_REG,
-                      ETHSYS_TRGMII_CLK_SEL362_5, 0);
+       if (priv->soc != SOC_MT7621) {
+               /* Select 250MHz clk for RGMII mode */
+               mtk_ethsys_rmw(priv, ETHSYS_CLKCFG0_REG,
+                              ETHSYS_TRGMII_CLK_SEL362_5, 0);
+
+               txdrv = 8;
+       } else {
+               txdrv = 4;
+       }
 
        /* Modify HWTRAP first to allow direct access to internal PHYs */
        mt753x_reg_read(priv, HWTRAP_REG, &val);
@@ -738,7 +745,8 @@ static int mt7530_setup(struct mtk_eth_priv *priv)
        /* Lower Tx Driving for TRGMII path */
        for (i = 0 ; i < NUM_TRGMII_CTRL ; i++)
                mt753x_reg_write(priv, MT7530_TRGMII_TD_ODT(i),
-                                (8 << TD_DM_DRVP_S) | (8 << TD_DM_DRVN_S));
+                                (txdrv << TD_DM_DRVP_S) |
+                                (txdrv << TD_DM_DRVN_S));
 
        for (i = 0 ; i < NUM_TRGMII_CTRL; i++)
                mt753x_reg_rmw(priv, MT7530_TRGMII_RD(i), RD_TAP_M, 16);
@@ -1540,6 +1548,7 @@ static const struct udevice_id mtk_eth_ids[] = {
        { .compatible = "mediatek,mt7629-eth", .data = SOC_MT7629 },
        { .compatible = "mediatek,mt7623-eth", .data = SOC_MT7623 },
        { .compatible = "mediatek,mt7622-eth", .data = SOC_MT7622 },
+       { .compatible = "mediatek,mt7621-eth", .data = SOC_MT7621 },
        {}
 };