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 --- drivers/mmc/sdhci.c | 3 +++ include/sdhci.h | 1 + 2 files changed, 4 insertions(+)
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c index 7845f87..b9cbe34 100644 --- a/drivers/mmc/sdhci.c +++ b/drivers/mmc/sdhci.c @@ -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); diff --git a/include/sdhci.h b/include/sdhci.h index c44793d..cffbe53 100644 --- a/include/sdhci.h +++ b/include/sdhci.h @@ -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;