On 06/28/2012 12:15 AM, [email protected] wrote:
From: Philip Rakity<[email protected]>
Power needs to be removed from the card when switching to 1.8v fails.
If a regulator is used to control vmmc we need to turn the
regulator off and then back on otherwise power will not be removed
from the card.
Reviewed-by: Aaron Lu <[email protected]>
-Aaron
Signed-off-by: Philip Rakity<[email protected]>
---
drivers/mmc/host/sdhci.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index f4b8b4d..ef4231a 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1663,11 +1663,15 @@ static int sdhci_do_start_signal_voltage_switch(struct
sdhci_host *host,
pwr = sdhci_readb(host, SDHCI_POWER_CONTROL);
pwr&= ~SDHCI_POWER_ON;
sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
+ if (host->vmmc)
+ regulator_disable(host->vmmc);
/* Wait for 1ms as per the spec */
usleep_range(1000, 1500);
pwr |= SDHCI_POWER_ON;
sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
+ if (host->vmmc)
+ regulator_enable(host->vmmc);
pr_info(DRIVER_NAME ": Switching to 1.8V signalling "
"voltage failed, retrying with S18R set to 0\n");
--
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