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mmc: add no simultaenous power and vdd

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Bring in the code from Linux kernel.

Added to Linux kernel by:
commit e08c1694d9e2138204f2b79b73f0f159074ce2f5
Author: Andres Salomon <dilinger@queued.net>
Date:   Fri Jul 4 10:00:03 2008 -0700

Some HW balks when writing both voltage setting and power up at the same
time to SDHCI_POWER_CONTROL register.

Signed-off-by: Rommel G Custodio <sessyargc@gmail.com>
CC: Andy Fleming <afleming@freescale.com>

v2: fix attribution and SOB
Signed-off-by: Andy Fleming <afleming@freescale.com>
This commit is contained in:
Mela Custodio 2012-11-03 17:40:16 +00:00 committed by Andy Fleming
parent b7e3129e55
commit 688c2d140b
2 changed files with 4 additions and 0 deletions
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3
drivers/mmc/sdhci.c
View File

@ -340,6 +340,9 @@ static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
return;
}
if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER)
sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
pwr |= SDHCI_POWER_ON;
sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);

1
include/sdhci.h
View File

@ -225,6 +225,7 @@
#define SDHCI_QUIRK_BROKEN_VOLTAGE (1 << 4)
#define SDHCI_QUIRK_NO_CD (1 << 5)
#define SDHCI_QUIRK_WAIT_SEND_CMD (1 << 6)
#define SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER (1 << 7)
/* to make gcc happy */
struct sdhci_host;