[U-Boot] [PATCH v2] mmc: add no simultaenous power and vdd

[RgC <sessyargc@gmail.com>]

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;
-- 
1.8.0

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