[PATCH] mmc: rockchip_dw_mmc: Allow 4-bit mode when 8-bit mode is supported

[Jonas Karlman]

Hosts capable of 8-bit can also do 4 bits, fix use of 4-bit mode when
8-bit mode is supported.

This fixes use of 1-bit mode with SD NAND on ROCK Pi S using the DT in
v6.11-rc1 that chage to use 8-bit bus to also support eMMC. With this
4-bit mode is used with SD NAND and 8-bit mode with eMMC, same as in
Linux kernel.

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
 drivers/mmc/rockchip_dw_mmc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/mmc/rockchip_dw_mmc.c b/drivers/mmc/rockchip_dw_mmc.c
index 1a10b7057a47..549fb80f1988 100644
--- a/drivers/mmc/rockchip_dw_mmc.c
+++ b/drivers/mmc/rockchip_dw_mmc.c
@@ -159,6 +159,10 @@ static int rockchip_dwmmc_probe(struct udevice *dev)
 	host->mmc->dev = dev;
 	upriv->mmc = host->mmc;
 
+	/* Hosts capable of 8-bit can also do 4 bits */
+	if (host->buswidth == 8)
+		plat->cfg.host_caps |= MMC_MODE_4BIT;
+
 	return dwmci_probe(dev);
 }
 
-- 
2.45.2