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authorAsh Charles <ash@gumstix.com>2011-09-28 06:47:16 +0000
committerAnatolij Gustschin <agust@denx.de>2011-12-09 17:28:28 +0100
commit528cdcaacee55eb6c2910637e19541ee2c327487 (patch)
treec778c0f877d734635bc7f38fd6a9f7f44cb446c3 /drivers/power
parentc4eba6ec5c58083b38340724c006294c7a4fe2eb (diff)
omap: TWL4030 Bump VMMC1 interface voltage from 3V to 3.15V
MMC interfaces are specified to be 3.3V compatible with an operating voltage range of 3.1V to 3.5V for SD cards. This change affects hardware using TWL4030 (TPS6595x) PMICs and should improve the reliability when communicating with marginally-spec'd MMC devices. 3.15V is the highest possible level for this chip. This patch has been tested on a Gumstix Overo board. Signed-off-by: Ash Charles <ash@gumstix.com> Tested-by: Steve Sakoman <steve@sakoman.com>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/twl4030.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/power/twl4030.c b/drivers/power/twl4030.c
index 5a7323a715..4a4ddeb91f 100644
--- a/drivers/power/twl4030.c
+++ b/drivers/power/twl4030.c
@@ -97,9 +97,9 @@ void twl4030_power_init(void)
void twl4030_power_mmc_init(void)
{
- /* Set VMMC1 to 3 Volts */
+ /* Set VMMC1 to 3.15 Volts */
twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VMMC1_DEDICATED,
- TWL4030_PM_RECEIVER_VMMC1_VSEL_30,
+ TWL4030_PM_RECEIVER_VMMC1_VSEL_32,
TWL4030_PM_RECEIVER_VMMC1_DEV_GRP,
TWL4030_PM_RECEIVER_DEV_GRP_P1);
}