[U-Boot] [PATCH 01/11] mmc: sdhci: disable the 8bit mode when host doesn't support it

[Jaehoon Chung]

Buswidth is depeneded on Hardware schematic.
Evne though host can support the 8bit buswidth, if hardware doesn't
support 8bit mode, it doesn't work fine.
So the buswidth mode selection leaves a matter in each SoC drivers.

On the contrary to this, hardware supports 8bit mode, but host doesn't
support it. then controller has to disable the MMC_MODE_8BIT.
(Host can check whether 8bit mode is supported or not, since V3.0)

Signed-off-by: Jaehoon Chung <jh80.chung at samsung.com>
---
 drivers/mmc/sdhci.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index cbf5f56..853c268 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -594,14 +594,13 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
 
 	cfg->host_caps = MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_4BIT;
 	if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
-		if (caps & SDHCI_CAN_DO_8BIT)
-			cfg->host_caps |= MMC_MODE_8BIT;
+		if (!(caps & SDHCI_CAN_DO_8BIT))
+			cfg->host_caps &= ~MMC_MODE_8BIT;
 	}
 
 	if (host->host_caps)
 		cfg->host_caps |= host->host_caps;
 
-
 	cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
 
 	/*
-- 
2.10.2