From: Adrian Hunter <adrian.hunter@xxxxxxxxx>
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@xxxxxxxxx>
Acked-by: Matt Fleming <matt@xxxxxxxxxxxxxxxxx>
Cc: Ian Molton <ian@xxxxxxxxxxxxxx>
Cc: "Roberto A. Foglietta" <roberto.foglietta@xxxxxxxxx>
Cc: Jarkko Lavinen <jarkko.lavinen@xxxxxxxxx>
Cc: Denis Karpov <ext-denis.2.karpov@xxxxxxxxx>
Cc: Pierre Ossman <pierre@xxxxxxxxx>
Cc: Philip Langdale <philipl@xxxxxxxxx>
Cc: "Madhusudhan" <madhu.cr@xxxxxx>
Cc: <linux-mmc@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/mmc-twl4030.c | 57 ++++++++++++++++++++++++
arch/arm/plat-omap/include/mach/mmc.h | 2
2 files changed, 59 insertions(+)
diff -puN arch/arm/mach-omap2/mmc-twl4030.c~arm-omap-mmc-twl4030-add-regulator-sleep-wake-function arch/arm/mach-omap2/mmc-twl4030.c
--- a/arch/arm/mach-omap2/mmc-twl4030.c~arm-omap-mmc-twl4030-add-regulator-sleep-wake-function
+++ a/arch/arm/mach-omap2/mmc-twl4030.c
@@ -340,6 +340,61 @@ static int twl_mmc23_set_power(struct de
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 twl4
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 twl4
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);
diff -puN arch/arm/plat-omap/include/mach/mmc.h~arm-omap-mmc-twl4030-add-regulator-sleep-wake-function arch/arm/plat-omap/include/mach/mmc.h
--- a/arch/arm/plat-omap/include/mach/mmc.h~arm-omap-mmc-twl4030-add-regulator-sleep-wake-function
+++ a/arch/arm/plat-omap/include/mach/mmc.h
@@ -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.
*
_
--
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