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omap_hsmmc: Allow for power saving without going off

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An eMMC may be always powered on, so that the lowest
power saving state possible is sleeping. Add a field
to the platform data to indicate that.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Adrian Hunter 2010-02-15 10:03:34 -08:00 committed by Tony Lindgren
parent ce6f00165d
commit 1df58db8a2
4 changed files with 13 additions and 0 deletions
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3
arch/arm/mach-omap2/hsmmc.c
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@ -202,6 +202,9 @@ 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.

1
arch/arm/mach-omap2/hsmmc.h
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@ -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 */

3
arch/arm/plat-omap/include/plat/mmc.h
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@ -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) */

6
drivers/mmc/host/omap_hsmmc.c
View File

@ -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 &&