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[V2,7/10] omap_hsmmc: Allow for power saving without going off

Message ID 20100117013343.17308.97040.sendpatchset@ahunter-work.research.nokia.com
State Accepted
Commit a8265c945196af0d6e9c34193c36986ca321dc01
Delegated to: Tony Lindgren
Headers show

Commit Message

Adrian Hunter Jan. 17, 2010, 1:33 a.m. UTC
None
diff mbox

Patch

diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
index 0ac5e4e..7e63296 100644
--- a/arch/arm/mach-omap2/hsmmc.c
+++ b/arch/arm/mach-omap2/hsmmc.c
@@ -201,6 +201,9 @@  void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers)
 		if (c->power_saving)
 			mmc->slots[0].power_saving = 1;
 
+		if (c->no_off)
+			mmc->slots[0].no_off = 1;
+
 		/* NOTE:  MMC slots should have a Vcc regulator set up.
 		 * This may be from a TWL4030-family chip, another
 		 * controllable regulator, or a fixed supply.
diff --git a/arch/arm/mach-omap2/hsmmc.h b/arch/arm/mach-omap2/hsmmc.h
index f641f59..2453a7a 100644
--- a/arch/arm/mach-omap2/hsmmc.h
+++ b/arch/arm/mach-omap2/hsmmc.h
@@ -14,6 +14,7 @@  struct omap2_hsmmc_info {
 	bool	cover_only;	/* No card detect - just cover switch */
 	bool	nonremovable;	/* Nonremovable e.g. eMMC */
 	bool	power_saving;	/* Try to sleep or power off when possible */
+	bool	no_off;		/* power_saving and power is not to go off */
 	int	gpio_cd;	/* or -EINVAL */
 	int	gpio_wp;	/* or -EINVAL */
 	char	*name;		/* or NULL for default */
diff --git a/arch/arm/plat-omap/include/plat/mmc.h b/arch/arm/plat-omap/include/plat/mmc.h
index 8b23d32..b463949 100644
--- a/arch/arm/plat-omap/include/plat/mmc.h
+++ b/arch/arm/plat-omap/include/plat/mmc.h
@@ -96,6 +96,9 @@  struct omap_mmc_platform_data {
 		/* Try to sleep or power off when possible */
 		unsigned power_saving:1;
 
+		/* If using power_saving and the MMC power is not to go off */
+		unsigned no_off:1;
+
 		int switch_pin;			/* gpio (card detect) */
 		int gpio_wp;			/* gpio (write protect) */
 
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 2c5e15d..e15d0f4 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1656,6 +1656,9 @@  static int omap_hsmmc_disabled_to_sleep(struct omap_hsmmc_host *host)
 	dev_dbg(mmc_dev(host->mmc), "DISABLED -> %s\n",
 		host->dpm_state == CARDSLEEP ? "CARDSLEEP" : "REGSLEEP");
 
+	if (mmc_slot(host).no_off)
+		return 0;
+
 	if ((host->mmc->caps & MMC_CAP_NONREMOVABLE) ||
 	    mmc_slot(host).card_detect ||
 	    (mmc_slot(host).get_cover_state &&
@@ -1671,6 +1674,9 @@  static int omap_hsmmc_sleep_to_off(struct omap_hsmmc_host *host)
 	if (!mmc_try_claim_host(host->mmc))
 		return 0;
 
+	if (mmc_slot(host).no_off)
+		return 0;
+
 	if (!((host->mmc->caps & MMC_CAP_NONREMOVABLE) ||
 	      mmc_slot(host).card_detect ||
 	      (mmc_slot(host).get_cover_state &&