| Message ID | 1317228436-4606-1-git-send-email-ash@gumstix.com |
|---|---|
| State | Accepted |
| Delegated to: | Anatolij Gustschin |
| Headers | show |
On Wed, Sep 28, 2011 at 9:47 AM, Ash Charles <ash@gumstix.com> wrote: > 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> Steve
On Wed, 28 Sep 2011 09:47:16 -0700 Ash Charles <ash@gumstix.com> wrote: > 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> > --- > drivers/power/twl4030.c | 4 ++-- > include/twl4030.h | 1 + > 2 files changed, 3 insertions(+), 2 deletions(-) Applied to u-boot-staging/agust@denx.de. Thanks! Anatolij
diff --git a/drivers/power/twl4030.c b/drivers/power/twl4030.c index 5a7323a..4a4ddeb 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); } diff --git a/include/twl4030.h b/include/twl4030.h index 930c285..9cd32ab 100644 --- a/include/twl4030.h +++ b/include/twl4030.h @@ -310,6 +310,7 @@ #define TWL4030_PM_RECEIVER_VPLL2_VSEL_18 0x05 #define TWL4030_PM_RECEIVER_VDAC_VSEL_18 0x03 #define TWL4030_PM_RECEIVER_VMMC1_VSEL_30 0x02 +#define TWL4030_PM_RECEIVER_VMMC1_VSEL_32 0x03 /* Device Selection in PM Receiver Module */ #define TWL4030_PM_RECEIVER_DEV_GRP_P1 0x20
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> --- drivers/power/twl4030.c | 4 ++-- include/twl4030.h | 1 + 2 files changed, 3 insertions(+), 2 deletions(-)