diff options
| author | Pali Rohár | 2022-05-11 20:27:12 +0200 |
|---|---|---|
| committer | Peng Fan | 2022-06-20 15:52:44 +0800 |
| commit | a29eb319a3f8ccfb657053b2941581fa1933974e (patch) | |
| tree | 82c0861bafce388a301025920616b1245dc697ef /drivers/mmc | |
| parent | d49480637681c0939f7d86b41318e3cc45795036 (diff) | |
mmc: fsl_esdhc: Set fallback mode to 1-bit
8-bit mode is not supported by SD cards and on P2020 are four SDHC pins
shared with SPI (so if P2020 board have also SPI then only 4-bit SDHC mode
is provided). So 8-bit SDHC mode is really bad default.
When max bus width is not provided then set mode to 1-bit. This mode is
supported by all cards, so it is the best option for fallback mode.
Also P2020 bootrom sets mode to 1-bit when booting from SD/MMC card.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/fsl_esdhc.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c index fdf2cc290e0..6c6d03d4500 100644 --- a/drivers/mmc/fsl_esdhc.c +++ b/drivers/mmc/fsl_esdhc.c @@ -946,9 +946,8 @@ int fsl_esdhc_initialize(struct bd_info *bis, struct fsl_esdhc_cfg *cfg) } else if (cfg->max_bus_width == 1) { mmc_cfg->host_caps |= MMC_MODE_1BIT; } else { - mmc_cfg->host_caps |= MMC_MODE_1BIT | MMC_MODE_4BIT | - MMC_MODE_8BIT; - printf("No max bus width provided. Assume 8-bit supported.\n"); + mmc_cfg->host_caps |= MMC_MODE_1BIT; + printf("No max bus width provided. Fallback to 1-bit mode.\n"); } if (IS_ENABLED(CONFIG_ESDHC_DETECT_8_BIT_QUIRK)) |