mmc: sdhci: Let a driver override timeout clock frequency
Let a driver override the timeout clock frequency by
populating it before calling sdhci_add_host(). Note
the value will otherwise be zero because sdhci_host is
zeroed when allocated.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index a932f70..ada1a3e 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2791,6 +2791,7 @@
u32 caps[2] = {0, 0};
u32 max_current_caps;
unsigned int ocr_avail;
+ unsigned int override_timeout_clk;
int ret;
WARN_ON(host == NULL);
@@ -2804,6 +2805,8 @@
if (debug_quirks2)
host->quirks2 = debug_quirks2;
+ override_timeout_clk = host->timeout_clk;
+
sdhci_do_reset(host, SDHCI_RESET_ALL);
host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
@@ -2970,6 +2973,9 @@
mmc->max_busy_timeout /= host->timeout_clk;
}
+ if (override_timeout_clk)
+ host->timeout_clk = override_timeout_clk;
+
mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23;
mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;