net: ethernet: arc: Add support emac for RK3036

The RK3036's GRFs offset are different with RK3066/RK3188, and need to set
mac TX/RX clock before probe emac.

Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 9 insertions, 3 deletions

diff --git a/drivers/net/ethernet/arc/Kconfig b/drivers/net/ethernet/arc/Kconfig
index 52a6b16f57d2..689045186064 100644
--- a/drivers/net/ethernet/arc/Kconfig
+++ b/drivers/net/ethernet/arc/Kconfig
@@ -34,9 +34,9 @@ config EMAC_ROCKCHIP
         select ARC_EMAC_CORE
         depends on OF_IRQ && OF_NET && REGULATOR && HAS_DMA
         ---help---
-          Support for Rockchip RK3066/RK3188 EMAC ethernet controllers.
+          Support for Rockchip RK3036/RK3066/RK3188 EMAC ethernet controllers.
           This selects Rockchip SoC glue layer support for the
-          emac device driver. This driver is used for RK3066/RK3188
+          emac device driver. This driver is used for RK3036/RK3066/RK3188
           EMAC ethernet controller.
 
 endif # NET_VENDOR_ARC
diff --git a/drivers/net/ethernet/arc/emac_rockchip.c b/drivers/net/ethernet/arc/emac_rockchip.c
index e951c8fab778..85e821ccfcd2 100644
--- a/drivers/net/ethernet/arc/emac_rockchip.c
+++ b/drivers/net/ethernet/arc/emac_rockchip.c
@@ -67,6 +67,11 @@ static void emac_rockchip_set_mac_speed(void *priv, unsigned int speed)
                 pr_err("unable to apply speed %u to grf (%d)\n", speed, err);
 }
 
+static const struct emac_rockchip_soc_data emac_rk3036_emac_data = {
+        .grf_offset = 0x140,   .grf_mode_offset = 8,
+        .grf_speed_offset = 9, .need_div_macclk = 1,
+};
+
 static const struct emac_rockchip_soc_data emac_rk3066_emac_data = {
         .grf_offset = 0x154,   .grf_mode_offset = 0,
         .grf_speed_offset = 1, .need_div_macclk = 0,
@@ -78,6 +83,7 @@ static const struct emac_rockchip_soc_data emac_rk3188_emac_data = {
 };
 
 static const struct of_device_id emac_rockchip_dt_ids[] = {
+        { .compatible = "rockchip,rk3036-emac", .data = &emac_rk3036_emac_data },
         { .compatible = "rockchip,rk3066-emac", .data = &emac_rk3066_emac_data },
         { .compatible = "rockchip,rk3188-emac", .data = &emac_rk3188_emac_data },
         { /* Sentinel */ }
@@ -110,7 +116,7 @@ static int emac_rockchip_probe(struct platform_device *pdev)
 
         interface = of_get_phy_mode(dev->of_node);
 
-        /* RK3066 and RK3188 SoCs only support RMII */
+        /* RK3036/RK3066/RK3188 SoCs only support RMII */
         if (interface != PHY_INTERFACE_MODE_RMII) {
                 dev_err(dev, "unsupported phy interface mode %d\n", interface);
                 err = -ENOTSUPP;