diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/omap_hsmmc.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 6f4b6b47c1c0..f46190cfae17 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -126,6 +126,10 @@ #define OMAP_MMC_MAX_CLOCK 52000000 #define DRIVER_NAME "omap_hsmmc" +#define VDD_1V8 1800000 /* 180000 uV */ +#define VDD_3V0 3000000 /* 300000 uV */ +#define VDD_165_195 (ffs(MMC_VDD_165_195) - 1) + /* * One controller can have multiple slots, like on some omap boards using * omap.c controller driver. Luckily this is not currently done on any known @@ -164,6 +168,8 @@ struct omap_hsmmc_host { */ struct regulator *vcc; struct regulator *vcc_aux; + struct regulator *pbias; + bool pbias_enabled; int pbias_disable; void __iomem *base; resource_size_t mapbase; @@ -277,6 +283,15 @@ static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on, if (mmc_slot(host).before_set_reg) mmc_slot(host).before_set_reg(dev, slot, power_on, vdd); + if (host->pbias) { + if (host->pbias_enabled == 1) { + ret = regulator_disable(host->pbias); + if (!ret) + host->pbias_enabled = 0; + } + regulator_set_voltage(host->pbias, VDD_3V0, VDD_3V0); + } + /* * Assume Vcc regulator is used only to power the card ... OMAP * VDDS is used to power the pins, optionally with a transceiver to @@ -311,9 +326,27 @@ static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on, } } + if (host->pbias) { + if (vdd <= VDD_165_195) + ret = regulator_set_voltage(host->pbias, VDD_1V8, + VDD_1V8); + else + ret = regulator_set_voltage(host->pbias, VDD_3V0, + VDD_3V0); + if (ret < 0) + goto error_set_power; + + if (host->pbias_enabled == 0) { + ret = regulator_enable(host->pbias); + if (!ret) + host->pbias_enabled = 1; + } + } + if (mmc_slot(host).after_set_reg) mmc_slot(host).after_set_reg(dev, slot, power_on, vdd); +error_set_power: return ret; } @@ -347,6 +380,9 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) reg = devm_regulator_get_optional(host->dev, "vmmc_aux"); host->vcc_aux = IS_ERR(reg) ? NULL : reg; + reg = devm_regulator_get_optional(host->dev, "pbias"); + host->pbias = IS_ERR(reg) ? NULL : reg; + /* For eMMC do not power off when not in sleep state */ if (mmc_slot(host).no_regulator_off_init) return 0; @@ -1831,6 +1867,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev) host->base = ioremap(host->mapbase, SZ_4K); host->power_mode = MMC_POWER_OFF; host->next_data.cookie = 1; + host->pbias_enabled = 0; platform_set_drvdata(pdev, host); |