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ARM: OMAP: mmc-twl4030: add regulator sleep / wake function

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Add the ability for the driver to put the card power regulators to sleep
and wake them up again.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: Matt Fleming <matt@console-pimps.org>
Cc: Ian Molton <ian@mnementh.co.uk>
Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: Denis Karpov <ext-denis.2.karpov@nokia.com>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Philip Langdale <philipl@overt.org>
Cc: "Madhusudhan" <madhu.cr@ti.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Adrian Hunter 2009-09-22 16:44:50 -07:00 committed by Linus Torvalds
parent dd498effcf
commit 9b7c18e070
2 changed files with 59 additions and 0 deletions
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57
arch/arm/mach-omap2/mmc-twl4030.c
View File

@ -340,6 +340,61 @@ static int twl_mmc23_set_power(struct device *dev, int slot, int power_on, int v
return ret;
}
static int twl_mmc1_set_sleep(struct device *dev, int slot, int sleep, int vdd,
int cardsleep)
{
struct twl_mmc_controller *c = &hsmmc[0];
int mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL;
return regulator_set_mode(c->vcc, mode);
}
static int twl_mmc23_set_sleep(struct device *dev, int slot, int sleep, int vdd,
int cardsleep)
{
struct twl_mmc_controller *c = NULL;
struct omap_mmc_platform_data *mmc = dev->platform_data;
int i, err, mode;
for (i = 1; i < ARRAY_SIZE(hsmmc); i++) {
if (mmc == hsmmc[i].mmc) {
c = &hsmmc[i];
break;
}
}
if (c == NULL)
return -ENODEV;
/*
* If we don't see a Vcc regulator, assume it's a fixed
* voltage always-on regulator.
*/
if (!c->vcc)
return 0;
mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL;
if (!c->vcc_aux)
return regulator_set_mode(c->vcc, mode);
if (cardsleep) {
/* VCC can be turned off if card is asleep */
struct regulator *vcc_aux = c->vcc_aux;
c->vcc_aux = NULL;
if (sleep)
err = twl_mmc23_set_power(dev, slot, 0, 0);
else
err = twl_mmc23_set_power(dev, slot, 1, vdd);
c->vcc_aux = vcc_aux;
} else
err = regulator_set_mode(c->vcc, mode);
if (err)
return err;
return regulator_set_mode(c->vcc_aux, mode);
}
static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata;
void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers)
@ -433,6 +488,7 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers)
case 1:
/* on-chip level shifting via PBIAS0/PBIAS1 */
mmc->slots[0].set_power = twl_mmc1_set_power;
mmc->slots[0].set_sleep = twl_mmc1_set_sleep;
break;
case 2:
if (c->ext_clock)
@ -443,6 +499,7 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers)
case 3:
/* off-chip level shifting, or none */
mmc->slots[0].set_power = twl_mmc23_set_power;
mmc->slots[0].set_sleep = twl_mmc23_set_sleep;
break;
default:
pr_err("MMC%d configuration not supported!\n", c->mmc);

2
arch/arm/plat-omap/include/mach/mmc.h
View File

@ -95,6 +95,8 @@ struct omap_mmc_platform_data {
int (* set_bus_mode)(struct device *dev, int slot, int bus_mode);
int (* set_power)(struct device *dev, int slot, int power_on, int vdd);
int (* get_ro)(struct device *dev, int slot);
int (*set_sleep)(struct device *dev, int slot, int sleep,
int vdd, int cardsleep);
/* return MMC cover switch state, can be NULL if not supported.
*