mmc: do not overwrite cfg->f_max if "max-frequency" if missing
mmc_of_parse() in U-Boot is a pussy helper; it sets cfg->f_max to
52MHz even if DT does not provide "max-frequency" at all. This can
overwrite cfg->f_max that may have been set to a reasonable default.
As the DT binding says, "max-frequency" is an optional property.
Do nothing if DT does not specify it. This is the behavior of
mmc_of_parse() in Linux.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
index 26c6ab7..7910a3e 100644
--- a/drivers/mmc/mmc-uclass.c
+++ b/drivers/mmc/mmc-uclass.c
@@ -146,7 +146,8 @@
break;
}
- cfg->f_max = dev_read_u32_default(dev, "max-frequency", 52000000);
+ /* f_max is obtained from the optional "max-frequency" property */
+ dev_read_u32(dev, "max-frequency", &cfg->f_max);
if (dev_read_bool(dev, "cap-sd-highspeed"))
cfg->host_caps |= MMC_CAP(SD_HS);