ARM: OMAP: mmc-twl4030: add regulator sleep / wake function
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>
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@ -340,6 +340,61 @@ static int twl_mmc23_set_power(struct device *dev, int slot, int power_on, int v
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return ret;
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}
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static int twl_mmc1_set_sleep(struct device *dev, int slot, int sleep, int vdd,
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int cardsleep)
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{
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struct twl_mmc_controller *c = &hsmmc[0];
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int mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL;
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return regulator_set_mode(c->vcc, mode);
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}
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static int twl_mmc23_set_sleep(struct device *dev, int slot, int sleep, int vdd,
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int cardsleep)
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{
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struct twl_mmc_controller *c = NULL;
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struct omap_mmc_platform_data *mmc = dev->platform_data;
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int i, err, mode;
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for (i = 1; i < ARRAY_SIZE(hsmmc); i++) {
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if (mmc == hsmmc[i].mmc) {
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c = &hsmmc[i];
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break;
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}
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}
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if (c == NULL)
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return -ENODEV;
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/*
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* If we don't see a Vcc regulator, assume it's a fixed
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* voltage always-on regulator.
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*/
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if (!c->vcc)
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return 0;
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mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL;
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if (!c->vcc_aux)
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return regulator_set_mode(c->vcc, mode);
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if (cardsleep) {
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/* VCC can be turned off if card is asleep */
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struct regulator *vcc_aux = c->vcc_aux;
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c->vcc_aux = NULL;
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if (sleep)
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err = twl_mmc23_set_power(dev, slot, 0, 0);
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else
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err = twl_mmc23_set_power(dev, slot, 1, vdd);
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c->vcc_aux = vcc_aux;
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} else
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err = regulator_set_mode(c->vcc, mode);
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if (err)
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return err;
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return regulator_set_mode(c->vcc_aux, mode);
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}
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static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata;
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void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers)
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@ -433,6 +488,7 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers)
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case 1:
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/* on-chip level shifting via PBIAS0/PBIAS1 */
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mmc->slots[0].set_power = twl_mmc1_set_power;
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mmc->slots[0].set_sleep = twl_mmc1_set_sleep;
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break;
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case 2:
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if (c->ext_clock)
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@ -443,6 +499,7 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers)
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case 3:
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/* off-chip level shifting, or none */
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mmc->slots[0].set_power = twl_mmc23_set_power;
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mmc->slots[0].set_sleep = twl_mmc23_set_sleep;
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break;
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default:
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pr_err("MMC%d configuration not supported!\n", c->mmc);
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@ -95,6 +95,8 @@ struct omap_mmc_platform_data {
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int (* set_bus_mode)(struct device *dev, int slot, int bus_mode);
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int (* set_power)(struct device *dev, int slot, int power_on, int vdd);
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int (* get_ro)(struct device *dev, int slot);
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int (*set_sleep)(struct device *dev, int slot, int sleep,
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int vdd, int cardsleep);
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/* return MMC cover switch state, can be NULL if not supported.
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*
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