diff mbox

mmc: sdhci: set regulator min/max voltage according to spec

Message ID 1347250416-20891-1-git-send-email-keyuan.liu@gmail.com (mailing list archive)
State Superseded, archived
Headers show

Commit Message

Kevin Liu Sept. 10, 2012, 4:13 a.m. UTC 
From: Kevin Liu <kliu5@marvell.com>

Use voltage range as below rather than a specific value
3.3v: (3.2v, 3.4v)
3.0v: (2.9v, 3.1v)
1.8v: (1.65v, 1.95v)

Signed-off-by: Jialing Fu <jlfu@marvell.com>
Signed-off-by: Kevin Liu <kliu5@marvell.com>
---
 drivers/mmc/host/sdhci.c |   18 +++++++++---------
 1 files changed, 9 insertions(+), 9 deletions(-)
diff mbox

Patch

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 962f696..08dae93 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1632,7 +1632,7 @@  static int sdhci_do_3_3v_signal_voltage_switch(struct sdhci_host *host,
 	sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
 
 	if (host->vqmmc) {
-		ret = regulator_set_voltage(host->vqmmc, 3300000, 3300000);
+		ret = regulator_set_voltage(host->vqmmc, 3200000, 3400000);
 		if (ret) {
 			pr_warning("%s: Switching to 3.3V signalling voltage "
 				   " failed\n", mmc_hostname(host->mmc));
@@ -1676,7 +1676,7 @@  static int sdhci_do_1_8v_signal_voltage_switch(struct sdhci_host *host,
 		 */
 		if (host->vqmmc)
 			ret = regulator_set_voltage(host->vqmmc,
-				1800000, 1800000);
+				1650000, 1950000);
 		else
 			ret = 0;
 
@@ -2860,7 +2860,7 @@  int sdhci_add_host(struct sdhci_host *host)
 		pr_info("%s: no vqmmc regulator found\n", mmc_hostname(mmc));
 		host->vqmmc = NULL;
 	}
-	else if (regulator_is_supported_voltage(host->vqmmc, 1800000, 1800000))
+	else if (regulator_is_supported_voltage(host->vqmmc, 1650000, 1950000))
 		regulator_enable(host->vqmmc);
 	else
 		caps[1] &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
@@ -2935,16 +2935,16 @@  int sdhci_add_host(struct sdhci_host *host)
 
 #ifdef CONFIG_REGULATOR
 	if (host->vmmc) {
-		ret = regulator_is_supported_voltage(host->vmmc, 3300000,
-			3300000);
+		ret = regulator_is_supported_voltage(host->vmmc, 3200000,
+			3400000);
 		if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_330)))
 			caps[0] &= ~SDHCI_CAN_VDD_330;
-		ret = regulator_is_supported_voltage(host->vmmc, 3000000,
-			3000000);
+		ret = regulator_is_supported_voltage(host->vmmc, 2900000,
+			3100000);
 		if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_300)))
 			caps[0] &= ~SDHCI_CAN_VDD_300;
-		ret = regulator_is_supported_voltage(host->vmmc, 1800000,
-			1800000);
+		ret = regulator_is_supported_voltage(host->vmmc, 1650000,
+			1950000);
 		if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_180)))
 			caps[0] &= ~SDHCI_CAN_VDD_180;
 	}