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ethernet: stmmac: dwmac-rk: Add RK3506 GMAC support

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Add the needed glue blocks for the RK3506-specific setup.

The RK3506 dwmac only supports up to 100MBit with a RMII PHY,
but no RGMII.

Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patch.msgid.link/20251023111213.298860-5-heiko@sntech.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
David Wu
2025-10-23 13:12:11 +02:00
committed by Jakub Kicinski
parent 4a667bec74
commit 2010163a8e
1 changed files with 64 additions and 0 deletions
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64
drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
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@@ -827,6 +827,69 @@ static const struct rk_gmac_ops rk3399_ops = {
.set_speed = rk3399_set_speed,
};
#define RK3506_GRF_SOC_CON8 0x0020
#define RK3506_GRF_SOC_CON11 0x002c
#define RK3506_GMAC_RMII_MODE GRF_BIT(1)
#define RK3506_GMAC_CLK_RMII_DIV2 GRF_BIT(3)
#define RK3506_GMAC_CLK_RMII_DIV20 GRF_CLR_BIT(3)
#define RK3506_GMAC_CLK_SELECT_CRU GRF_CLR_BIT(5)
#define RK3506_GMAC_CLK_SELECT_IO GRF_BIT(5)
#define RK3506_GMAC_CLK_RMII_GATE GRF_BIT(2)
#define RK3506_GMAC_CLK_RMII_NOGATE GRF_CLR_BIT(2)
static void rk3506_set_to_rmii(struct rk_priv_data *bsp_priv)
{
unsigned int id = bsp_priv->id, offset;
offset = (id == 1) ? RK3506_GRF_SOC_CON11 : RK3506_GRF_SOC_CON8;
regmap_write(bsp_priv->grf, offset, RK3506_GMAC_RMII_MODE);
}
static const struct rk_reg_speed_data rk3506_reg_speed_data = {
.rmii_10 = RK3506_GMAC_CLK_RMII_DIV20,
.rmii_100 = RK3506_GMAC_CLK_RMII_DIV2,
};
static int rk3506_set_speed(struct rk_priv_data *bsp_priv,
phy_interface_t interface, int speed)
{
unsigned int id = bsp_priv->id, offset;
offset = (id == 1) ? RK3506_GRF_SOC_CON11 : RK3506_GRF_SOC_CON8;
return rk_set_reg_speed(bsp_priv, &rk3506_reg_speed_data,
offset, interface, speed);
}
static void rk3506_set_clock_selection(struct rk_priv_data *bsp_priv,
bool input, bool enable)
{
unsigned int value, offset, id = bsp_priv->id;
offset = (id == 1) ? RK3506_GRF_SOC_CON11 : RK3506_GRF_SOC_CON8;
value = input ? RK3506_GMAC_CLK_SELECT_IO :
RK3506_GMAC_CLK_SELECT_CRU;
value |= enable ? RK3506_GMAC_CLK_RMII_NOGATE :
RK3506_GMAC_CLK_RMII_GATE;
regmap_write(bsp_priv->grf, offset, value);
}
static const struct rk_gmac_ops rk3506_ops = {
.set_to_rmii = rk3506_set_to_rmii,
.set_speed = rk3506_set_speed,
.set_clock_selection = rk3506_set_clock_selection,
.regs_valid = true,
.regs = {
0xff4c8000, /* gmac0 */
0xff4d0000, /* gmac1 */
0x0, /* sentinel */
},
};
#define RK3528_VO_GRF_GMAC_CON 0x0018
#define RK3528_VO_GRF_MACPHY_CON0 0x001c
#define RK3528_VO_GRF_MACPHY_CON1 0x0020
@@ -1809,6 +1872,7 @@ static const struct of_device_id rk_gmac_dwmac_match[] = {
{ .compatible = "rockchip,rk3366-gmac", .data = &rk3366_ops },
{ .compatible = "rockchip,rk3368-gmac", .data = &rk3368_ops },
{ .compatible = "rockchip,rk3399-gmac", .data = &rk3399_ops },
{ .compatible = "rockchip,rk3506-gmac", .data = &rk3506_ops },
{ .compatible = "rockchip,rk3528-gmac", .data = &rk3528_ops },
{ .compatible = "rockchip,rk3568-gmac", .data = &rk3568_ops },
{ .compatible = "rockchip,rk3576-gmac", .data = &rk3576_ops },