From: Kevin Liu <kliu5@marvell.com>
Date: Sat, 17 Nov 2012 22:55:51 +0000 (-0500)
Subject: mmc: sdhci: Balance vmmc regulator_enable(), and always enable vqmmc
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=8363c374145b69bb177ed7e658a2b22f9c64910f;p=openwrt%2Fstaging%2Fblogic.git

mmc: sdhci: Balance vmmc regulator_enable(), and always enable vqmmc

The vmmc regulator enable in sdhci_add_host is NOT necessary since
it can be enabled during mmc_power_up by function mmc_regulator_set_ocr.
And this extra enable will make regulator_enable/regulator_disable
unbalanced. Consequently, vmmc can't be disabled during mmc_power_off.

Also, if the vqmmc regulator exists, it should be enabled regardless it
support 1.8v or not.

Signed-off-by: Kevin Liu <kliu5@marvell.com>
Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index c7851c0aabce..2f62fe4309f2 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2858,12 +2858,14 @@ int sdhci_add_host(struct sdhci_host *host)
 				mmc_hostname(mmc));
 			host->vqmmc = NULL;
 		}
-	}
-	else if (regulator_is_supported_voltage(host->vqmmc, 1800000, 1800000))
+	} else {
 		regulator_enable(host->vqmmc);
-	else
-		caps[1] &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
-		       SDHCI_SUPPORT_DDR50);
+		if (!regulator_is_supported_voltage(host->vqmmc, 1800000,
+			1800000))
+			caps[1] &= ~(SDHCI_SUPPORT_SDR104 |
+					SDHCI_SUPPORT_SDR50 |
+					SDHCI_SUPPORT_DDR50);
+	}
 
 	/* Any UHS-I mode in caps implies SDR12 and SDR25 support. */
 	if (caps[1] & (SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
@@ -2919,8 +2921,7 @@ int sdhci_add_host(struct sdhci_host *host)
 				mmc_hostname(mmc));
 			host->vmmc = NULL;
 		}
-	} else
-		regulator_enable(host->vmmc);
+	}
 
 #ifdef CONFIG_REGULATOR
 	if (host->vmmc) {