mmc: dw_mmc-rockchip: Add support for rk3576 SoCs

On rk3576 the tunable clocks are inside the controller itself, removing
the need for the "ciu-drive" and "ciu-sample" clocks.

That makes it a new type of controller that has its own dt_parse function.
Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/010201919997044d-c3a008d1-afbc-462f-a928-fc1ece785bdb-000000@eu-west-1.amazonses.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/dw_mmc-rockchip.c

@@ -407,7 +407,7 @@ static int dw_mci_rk3288_execute_tuning(struct dw_mci_slot *slot, u32 opcode)
 	return ret;
 }
 
-static int dw_mci_rk3288_parse_dt(struct dw_mci *host)
+static int dw_mci_common_parse_dt(struct dw_mci *host)
 {
 	struct device_node *np = host->dev->of_node;
 	struct dw_mci_rockchip_priv_data *priv;
@@ -417,13 +417,29 @@ static int dw_mci_rk3288_parse_dt(struct dw_mci *host)
 		return -ENOMEM;
 
 	if (of_property_read_u32(np, "rockchip,desired-num-phases",
-					&priv->num_phases))
+				 &priv->num_phases))
 		priv->num_phases = 360;
 
 	if (of_property_read_u32(np, "rockchip,default-sample-phase",
-					&priv->default_sample_phase))
+				 &priv->default_sample_phase))
 		priv->default_sample_phase = 0;
 
+	host->priv = priv;
+
+	return 0;
+}
+
+static int dw_mci_rk3288_parse_dt(struct dw_mci *host)
+{
+	struct dw_mci_rockchip_priv_data *priv;
+	int err;
+
+	err = dw_mci_common_parse_dt(host);
+	if (err)
+		return err;
+
+	priv = host->priv;
+
 	priv->drv_clk = devm_clk_get(host->dev, "ciu-drive");
 	if (IS_ERR(priv->drv_clk))
 		dev_dbg(host->dev, "ciu-drive not available\n");
@@ -432,13 +448,25 @@ static int dw_mci_rk3288_parse_dt(struct dw_mci *host)
 	if (IS_ERR(priv->sample_clk))
 		dev_dbg(host->dev, "ciu-sample not available\n");
 
-	host->priv = priv;
-
 	priv->internal_phase = false;
 
 	return 0;
 }
 
+static int dw_mci_rk3576_parse_dt(struct dw_mci *host)
+{
+	struct dw_mci_rockchip_priv_data *priv;
+	int err = dw_mci_common_parse_dt(host);
+	if (err)
+		return err;
+
+	priv = host->priv;
+
+	priv->internal_phase = true;
+
+	return 0;
+}
+
 static int dw_mci_rockchip_init(struct dw_mci *host)
 {
 	int ret, i;
@@ -480,11 +508,21 @@ static const struct dw_mci_drv_data rk3288_drv_data = {
 	.init			= dw_mci_rockchip_init,
 };
 
+static const struct dw_mci_drv_data rk3576_drv_data = {
+	.common_caps		= MMC_CAP_CMD23,
+	.set_ios		= dw_mci_rk3288_set_ios,
+	.execute_tuning		= dw_mci_rk3288_execute_tuning,
+	.parse_dt		= dw_mci_rk3576_parse_dt,
+	.init			= dw_mci_rockchip_init,
+};
+
 static const struct of_device_id dw_mci_rockchip_match[] = {
 	{ .compatible = "rockchip,rk2928-dw-mshc",
 		.data = &rk2928_drv_data },
 	{ .compatible = "rockchip,rk3288-dw-mshc",
 		.data = &rk3288_drv_data },
+	{ .compatible = "rockchip,rk3576-dw-mshc",
+		.data = &rk3576_drv_data },
 	{},
 };
 MODULE_DEVICE_TABLE(of, dw_mci_rockchip_match);