diff options
author | Kishon Vijay Abraham I <kishon@ti.com> | 2015-08-27 14:44:03 +0530 |
---|---|---|
committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-08-27 14:54:07 +0200 |
commit | c8518efa6de999bcbd638702c2a2d72fe83431e4 (patch) | |
tree | 74e70bef2e36b6151da56910cea7ebfa8f7e5491 /drivers/mmc/host/omap_hsmmc.c | |
parent | 97fe7e5ab6318ea5716f86be3b4ca8776a9e609c (diff) | |
download | linux-c8518efa6de999bcbd638702c2a2d72fe83431e4.tar.bz2 |
mmc: host: omap_hsmmc: don't use ->set_power to set initial regulator state
If the regulator is enabled on boot (checked using regulator_is_enabled),
invoke regulator_enable() so that the usecount reflects the correct
state of the regulator and then disable the regulator so that the
initial state of the regulator is disabled. Avoid using ->set_power,
since set_power also takes care of setting the voltages which is not
needed at this point.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/omap_hsmmc.c')
-rw-r--r-- | drivers/mmc/host/omap_hsmmc.c | 66 |
1 files changed, 56 insertions, 10 deletions
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index eec69752a189..cd4bd6d4c71e 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -409,6 +409,59 @@ err_set_voltage: return ret; } +static int omap_hsmmc_disable_boot_regulator(struct regulator *reg) +{ + int ret; + + if (!reg) + return 0; + + if (regulator_is_enabled(reg)) { + ret = regulator_enable(reg); + if (ret) + return ret; + + ret = regulator_disable(reg); + if (ret) + return ret; + } + + return 0; +} + +static int omap_hsmmc_disable_boot_regulators(struct omap_hsmmc_host *host) +{ + struct mmc_host *mmc = host->mmc; + int ret; + + /* + * disable regulators enabled during boot and get the usecount + * right so that regulators can be enabled/disabled by checking + * the return value of regulator_is_enabled + */ + ret = omap_hsmmc_disable_boot_regulator(mmc->supply.vmmc); + if (ret) { + dev_err(host->dev, "fail to disable boot enabled vmmc reg\n"); + return ret; + } + + ret = omap_hsmmc_disable_boot_regulator(mmc->supply.vqmmc); + if (ret) { + dev_err(host->dev, + "fail to disable boot enabled vmmc_aux reg\n"); + return ret; + } + + ret = omap_hsmmc_disable_boot_regulator(host->pbias); + if (ret) { + dev_err(host->dev, + "failed to disable boot enabled pbias reg\n"); + return ret; + } + + return 0; +} + static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) { int ocr_value = 0; @@ -456,17 +509,10 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) /* For eMMC do not power off when not in sleep state */ if (mmc_pdata(host)->no_regulator_off_init) return 0; - /* - * To disable boot_on regulator, enable regulator - * to increase usecount and then disable it. - */ - if ((mmc->supply.vmmc && regulator_is_enabled(mmc->supply.vmmc) > 0) || - (mmc->supply.vqmmc && regulator_is_enabled(mmc->supply.vqmmc))) { - int vdd = ffs(mmc_pdata(host)->ocr_mask) - 1; - omap_hsmmc_set_power(host->dev, 1, vdd); - omap_hsmmc_set_power(host->dev, 0, 0); - } + ret = omap_hsmmc_disable_boot_regulators(host); + if (ret) + return ret; return 0; } |