OMAP2/3: mmc-twl4030: Free up MMC regulators while cleaning up

twl_mmc_cleanup() must free up the regulators that were
allocated by twl_mmc_late_init().
This eliminates the below error when 'omap_hsmmc' module is
repeatedly loaded and unloaded.

"sysfs: cannot create duplicate filename '/devices/platform
 /mmci-omap-hs.0/microamps_requested_vmmc'"

Signed-off-by: Roger Quadros <ext-roger.quadros@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/mmc-twl4030.c b/arch/arm/mach-omap2/mmc-twl4030.c
index 1541fd4c8d0f..3c04c2f1b23f 100644
--- a/arch/arm/mach-omap2/mmc-twl4030.c
+++ b/arch/arm/mach-omap2/mmc-twl4030.c
@@ -119,6 +119,7 @@ static int twl_mmc_late_init(struct device *dev)
                                 if (i != 0)
                                         break;
                                 ret = PTR_ERR(reg);
+                                hsmmc[i].vcc = NULL;
                                 goto err;
                         }
                         hsmmc[i].vcc = reg;
@@ -165,8 +166,13 @@ done:
 static void twl_mmc_cleanup(struct device *dev)
 {
         struct omap_mmc_platform_data *mmc = dev->platform_data;
+        int i;
 
         gpio_free(mmc->slots[0].switch_pin);
+        for(i = 0; i < ARRAY_SIZE(hsmmc); i++) {
+                regulator_put(hsmmc[i].vcc);
+                regulator_put(hsmmc[i].vcc_aux);
+        }
 }
 
 #ifdef CONFIG_PM