mmc: mediatek: add MT6779 MMC driver support

Add new code to support MT6779 mmc driver.

Signed-off-by: Chun-Hung Wu <chun-hung.wu@mediatek.com>
Link: https://lore.kernel.org/r/1595205759-5825-2-git-send-email-chun-hung.wu@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Author: bnw3000

drivers/mmc/host/mtk-sd.c

@@ -538,6 +538,18 @@ static const struct mtk_mmc_compatible mt7620_compat = {
 	.use_internal_cd = true,
 };
 
+static const struct mtk_mmc_compatible mt6779_compat = {
+	.clk_div_bits = 12,
+	.hs400_tune = false,
+	.pad_tune_reg = MSDC_PAD_TUNE0,
+	.async_fifo = true,
+	.data_tune = true,
+	.busy_check = true,
+	.stop_clk_fix = true,
+	.enhance_rx = true,
+	.support_64g = true,
+};
+
 static const struct of_device_id msdc_of_ids[] = {
 	{ .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat},
 	{ .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat},
@@ -547,6 +559,7 @@ static const struct of_device_id msdc_of_ids[] = {
 	{ .compatible = "mediatek,mt7622-mmc", .data = &mt7622_compat},
 	{ .compatible = "mediatek,mt8516-mmc", .data = &mt8516_compat},
 	{ .compatible = "mediatek,mt7620-mmc", .data = &mt7620_compat},
+	{ .compatible = "mediatek,mt6779-mmc", .data = &mt6779_compat},
 	{}
 };
 MODULE_DEVICE_TABLE(of, msdc_of_ids);