mmc: add no simultaenous power and vdd

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>

mmc: add no simultaenous power and vdd
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>
Mela Custodio · Andy Fleming
1 parent b7e3129e55
Showing 2 changed files with 4 additions and 0 deletions Side-by-side Diff
drivers/mmc/sdhci.c
include/sdhci.h
@@ -340,6 +340,9 @@
 		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);
@@ -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;
...	...	@@ -340,6 +340,9 @@
340	340	return;
341	341	}
342	342
	343	+ if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER)
	344	+ sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
	345	+
343	346	pwr \|= SDHCI_POWER_ON;
344	347
345	348	sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
...	...	@@ -225,6 +225,7 @@
225	225	#define SDHCI_QUIRK_BROKEN_VOLTAGE (1 << 4)
226	226	#define SDHCI_QUIRK_NO_CD (1 << 5)
227	227	#define SDHCI_QUIRK_WAIT_SEND_CMD (1 << 6)
	228	+#define SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER (1 << 7)
228	229
229	230	/* to make gcc happy */
230	231	struct sdhci_host;