mmc: omap_hsmmc: handle vcc and vcc_aux independently

handle vcc and vcc_aux independently to reduce indent.

Signed-off-by: Balaji T K <balajitk@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Tested-by: Florian Vaussard <florian.vaussard@epfl.ch>
Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Chris Ball <chris@printf.net>

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 36fb91eefd82d79c2d985144680c43b58562d639..6f4b6b47c1c09659665a0638d6b3107c1e7e66e8 100644 (file)
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -291,11 +291,12 @@ static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on,
         * chips/cards need an interface voltage rail too.
         */
        if (power_on) {
-               ret = mmc_regulator_set_ocr(host->mmc, host->vcc, vdd);
+               if (host->vcc)
+                       ret = mmc_regulator_set_ocr(host->mmc, host->vcc, vdd);
                /* Enable interface voltage rail, if needed */
                if (ret == 0 && host->vcc_aux) {
                        ret = regulator_enable(host->vcc_aux);
-                       if (ret < 0)
+                       if (ret < 0 && host->vcc)
                                ret = mmc_regulator_set_ocr(host->mmc,
                                                        host->vcc, 0);
                }
@@ -303,7 +304,7 @@ static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on,
                /* Shut down the rail */
                if (host->vcc_aux)
                        ret = regulator_disable(host->vcc_aux);
-               if (!ret) {
+               if (host->vcc) {
                        /* Then proceed to shut down the local regulator */
                        ret = mmc_regulator_set_ocr(host->mmc,
                                                host->vcc, 0);
@@ -323,10 +324,10 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
 
        reg = devm_regulator_get(host->dev, "vmmc");
        if (IS_ERR(reg)) {
-               dev_err(host->dev, "vmmc regulator missing\n");
+               dev_err(host->dev, "unable to get vmmc regulator %ld\n",
+                       PTR_ERR(reg));
                return PTR_ERR(reg);
        } else {
-               mmc_slot(host).set_power = omap_hsmmc_set_power;
                host->vcc = reg;
                ocr_value = mmc_regulator_get_ocrmask(reg);
                if (!mmc_slot(host).ocr_mask) {
@@ -339,31 +340,26 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
                                return -EINVAL;
                        }
                }
+       }
+       mmc_slot(host).set_power = omap_hsmmc_set_power;
 
-               /* Allow an aux regulator */
-               reg = devm_regulator_get_optional(host->dev, "vmmc_aux");
-               host->vcc_aux = IS_ERR(reg) ? NULL : reg;
+       /* Allow an aux regulator */
+       reg = devm_regulator_get_optional(host->dev, "vmmc_aux");
+       host->vcc_aux = 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;
-               /*
-               * UGLY HACK:  workaround regulator framework bugs.
-               * When the bootloader leaves a supply active, it's
-               * initialized with zero usecount ... and we can't
-               * disable it without first enabling it.  Until the
-               * framework is fixed, we need a workaround like this
-               * (which is safe for MMC, but not in general).
-               */
-               if (regulator_is_enabled(host->vcc) > 0 ||
-                   (host->vcc_aux && regulator_is_enabled(host->vcc_aux))) {
-                       int vdd = ffs(mmc_slot(host).ocr_mask) - 1;
+       /* For eMMC do not power off when not in sleep state */
+       if (mmc_slot(host).no_regulator_off_init)
+               return 0;
+       /*
+        * To disable boot_on regulator, enable regulator
+        * to increase usecount and then disable it.
+        */
+       if ((host->vcc && regulator_is_enabled(host->vcc) > 0) ||
+           (host->vcc_aux && regulator_is_enabled(host->vcc_aux))) {
+               int vdd = ffs(mmc_slot(host).ocr_mask) - 1;
 
-                       mmc_slot(host).set_power(host->dev, host->slot_id,
-                                                1, vdd);
-                       mmc_slot(host).set_power(host->dev, host->slot_id,
-                                                0, 0);
-               }
+               mmc_slot(host).set_power(host->dev, host->slot_id, 1, vdd);
+               mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0);
        }
 
        return 0;