From: Kevin Liu <kliu5@xxxxxxxxxxx>
For regulator vmmc/vmmcq, use voltage range as below
3.3v/3.0v: (2.7v, 3.6v)
1.8v: (1.7v, 1.95v)
Original code use the specific value which may fail in regulator
driver if it does NOT support the specific voltage.
Signed-off-by: Jialing Fu <jlfu@xxxxxxxxxxx>
Signed-off-by: Kevin Liu <kliu5@xxxxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 16 +++++++---------
1 files changed, 7 insertions(+), 9 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 3aef580..36afd47 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1628,7 +1628,7 @@ 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, 2700000, 3600000);
if (ret) {
pr_warning("%s: Switching to 3.3V signalling voltage "
" failed\n", mmc_hostname(host->mmc));
@@ -1672,7 +1672,7 @@ static int sdhci_do_1_8v_signal_voltage_switch(struct sdhci_host *host,
*/
if (host->vqmmc)
ret = regulator_set_voltage(host->vqmmc,
- 1800000, 1800000);
+ 1700000, 1950000);
else
ret = 0;
@@ -2856,7 +2856,7 @@ 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, 1700000, 1950000))
regulator_enable(host->vqmmc);
else
caps[1] &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
@@ -2927,16 +2927,14 @@ 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, 2700000,
+ 3600000);
if ((ret <= 0) && (caps[0] & SDHCI_CAN_VDD_330))
caps[0] &= ~SDHCI_CAN_VDD_330;
- ret = regulator_is_supported_voltage(host->vmmc, 3000000,
- 3000000);
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, 1700000,
+ 1950000);
if ((ret <= 0) && (caps[0] & SDHCI_CAN_VDD_180))
caps[0] &= ~SDHCI_CAN_VDD_180;
}
--
1.7.0.4
--
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