mmc: rockchip_dw_mmc: Allow 4-bit mode when 8-bit mode is supported
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@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/drivers/mmc/rockchip_dw_mmc.c b/drivers/mmc/rockchip_dw_mmc.c
index 1a10b70..549fb80 100644
--- a/drivers/mmc/rockchip_dw_mmc.c
+++ b/drivers/mmc/rockchip_dw_mmc.c
@@ -159,6 +159,10 @@
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);
}