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mmc: mmc-uclass: Use max-frequency from device tree with driver default fallback

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Use dev_read_u32_default() instead of dev_read_u32() to read the
"max-frequency" property from device tree. This preserves the driver-set
cfg->f_max value when the optional "max-frequency" property is not
present, ensuring the controller's default frequency is used as fallback
rather than being overwritten.

Suggested-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Signed-off-by: Tanmay Kathpalia <tanmay.kathpalia@altera.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Tanmay Kathpalia
2026-01-16 04:50:31 -08:00
committed by Peng Fan
parent dab2c154f6
commit efc2668568
1 changed files with 6 additions and 2 deletions
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8
drivers/mmc/mmc-uclass.c
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@@ -243,8 +243,12 @@ int mmc_of_parse(struct udevice *dev, struct mmc_config *cfg)
return -EINVAL;
}
/* f_max is obtained from the optional "max-frequency" property */
dev_read_u32(dev, "max-frequency", &cfg->f_max);
/*
* Maximum frequency is obtained from the optional "max-frequency" DT property.
* Use dev_read_u32_default() to preserve the driver-set f_max value when
* "max-frequency" is not present, ensuring the controller's default is used.
*/
cfg->f_max = dev_read_u32_default(dev, "max-frequency", cfg->f_max);
if (dev_read_bool(dev, "cap-sd-highspeed"))
cfg->host_caps |= MMC_CAP(SD_HS);