diff options
Diffstat (limited to 'drivers/mmc/host/mmci.c')
| -rw-r--r-- | drivers/mmc/host/mmci.c | 50 |
1 files changed, 46 insertions, 4 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 79205e565c07..3d1e5329da12 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -23,6 +23,7 @@ #include <linux/scatterlist.h> #include <linux/gpio.h> #include <linux/amba/mmci.h> +#include <linux/regulator/consumer.h> #include <asm/cacheflush.h> #include <asm/div64.h> @@ -452,13 +453,28 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) u32 pwr = 0; unsigned long flags; - if (host->plat->translate_vdd) - pwr |= host->plat->translate_vdd(mmc_dev(mmc), ios->vdd); - switch (ios->power_mode) { case MMC_POWER_OFF: + if(host->vcc && + regulator_is_enabled(host->vcc)) + regulator_disable(host->vcc); break; case MMC_POWER_UP: +#ifdef CONFIG_REGULATOR + if (host->vcc) + /* This implicitly enables the regulator */ + mmc_regulator_set_ocr(host->vcc, ios->vdd); +#endif + /* + * The translate_vdd function is not used if you have + * an external regulator, or your design is really weird. + * Using it would mean sending in power control BOTH using + * a regulator AND the 4 MMCIPWR bits. If we don't have + * a regulator, we might have some other platform specific + * power control behind this translate function. + */ + if (!host->vcc && host->plat->translate_vdd) + pwr |= host->plat->translate_vdd(mmc_dev(mmc), ios->vdd); /* The ST version does not have this, fall through to POWER_ON */ if (host->hw_designer != AMBA_VENDOR_ST) { pwr |= MCI_PWR_UP; @@ -603,7 +619,29 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id) mmc->ops = &mmci_ops; mmc->f_min = (host->mclk + 511) / 512; mmc->f_max = min(host->mclk, fmax); - mmc->ocr_avail = plat->ocr_mask; +#ifdef CONFIG_REGULATOR + /* If we're using the regulator framework, try to fetch a regulator */ + host->vcc = regulator_get(&dev->dev, "vmmc"); + if (IS_ERR(host->vcc)) + host->vcc = NULL; + else { + int mask = mmc_regulator_get_ocrmask(host->vcc); + + if (mask < 0) + dev_err(&dev->dev, "error getting OCR mask (%d)\n", + mask); + else { + host->mmc->ocr_avail = (u32) mask; + if (plat->ocr_mask) + dev_warn(&dev->dev, + "Provided ocr_mask/setpower will not be used " + "(using regulator instead)\n"); + } + } +#endif + /* Fall back to platform data if no regulator is found */ + if (host->vcc == NULL) + mmc->ocr_avail = plat->ocr_mask; mmc->caps = plat->capabilities; /* @@ -741,6 +779,10 @@ static int __devexit mmci_remove(struct amba_device *dev) clk_disable(host->clk); clk_put(host->clk); + if (regulator_is_enabled(host->vcc)) + regulator_disable(host->vcc); + regulator_put(host->vcc); + mmc_free_host(mmc); amba_release_regions(dev); |