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@xxxxxx>
---
drivers/mmc/host/omap_hsmmc.c | 67 +++++++++++++++++++++++++++++++++++------
1 file changed, 57 insertions(+), 10 deletions(-)
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 2e5c7cd..58bda42 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -407,9 +407,63 @@ 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;
+ int ret;
struct mmc_host *mmc = host->mmc;
mmc->supply.vmmc = devm_regulator_get_optional(host->dev, "vmmc");
@@ -448,17 +502,10 @@ 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;
- mmc_pdata(host)->set_power(host->dev, 1, vdd);
- mmc_pdata(host)->set_power(host->dev, 0, 0);
- }
+ ret = omap_hsmmc_disable_boot_regulators(host);
+ if (ret)
+ return ret;
return 0;
}
--
1.7.9.5
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