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sdhci : recompute timeout_clk when needed 

when SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK is set, timeout_clk is sdclk.
We need to update it when we change sdclk in sdhci_set_clock.
This allow to have a more precisse timeout and max_busy_timeout. This
can help for command that need a big busy wait (erase, ...).

Signed-off-by: Matthieu CASTET <matthieu.castet@parrot.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Matthieu CASTET 2014-08-14 16:03:18 +02:00 committed by Ulf Hansson
parent c5abd5e899
commit fac6a52fe9
1 changed files with 7 additions and 1 deletions
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8
drivers/mmc/host/sdhci.c
View File

@ -1192,8 +1192,14 @@ void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
}
clock_set:
if (real_div)
if (real_div) {
host->mmc->actual_clock = (host->max_clk * clk_mul) / real_div;
if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK) {
host->timeout_clk = host->mmc->actual_clock / 1000;
host->mmc->max_busy_timeout =
(1 << 27) / host->timeout_clk;
}
}
clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)