Commit 8dfd0374 authored by Sascha Hauer's avatar Sascha Hauer Committed by Pierre Ossman

MMC core: limit minimum initialization frequency to 400kHz

Some controllers allow a much lower frequency than 400kHz.
Keep the minimum frequency within sensible limits.
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent ae628903
...@@ -708,7 +708,13 @@ static void mmc_power_up(struct mmc_host *host) ...@@ -708,7 +708,13 @@ static void mmc_power_up(struct mmc_host *host)
*/ */
mmc_delay(10); mmc_delay(10);
host->ios.clock = host->f_min; if (host->f_min > 400000) {
pr_warning("%s: Minimum clock frequency too high for "
"identification mode\n", mmc_hostname(host));
host->ios.clock = host->f_min;
} else
host->ios.clock = 400000;
host->ios.power_mode = MMC_POWER_ON; host->ios.power_mode = MMC_POWER_ON;
mmc_set_ios(host); mmc_set_ios(host);
......
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