Do not reset GPIO1 at boot-up because GPIO 7 in GPIO1 block is used on OMAP4460 PandaBoard-ES to select voltage register in TPS62361 which supplies VDD_MPU. Without this, OMAP4460 PandaBoard-ES boards fail to boot-up because MPU voltage switches over to VSET0 voltage value (boot voltage) which is not sufficient to operate the device at OPP100. Signed-off-by: Nishanth Menon <nm@xxxxxx> --- As explained here: http://marc.info/?l=u-boot&m=133066647800872&w=2 GPIO1 reset causes PandaBoard-ES to stop functioning. This depends on Patch series from Rajendra: http://marc.info/?l=linux-doc&m=138131355520116&w=2 Applies on Benoit's for_13/dts branch: https://git.kernel.org/cgit/linux/kernel/git/bcousson/linux-omap-dt.git/log/?h=for_3.13/dts Tested on PandaBoard-ES without the u-boot uenv hack arch/arm/boot/dts/omap4-panda-es.dts | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm/boot/dts/omap4-panda-es.dts b/arch/arm/boot/dts/omap4-panda-es.dts index 56c4354..816d1c9 100644 --- a/arch/arm/boot/dts/omap4-panda-es.dts +++ b/arch/arm/boot/dts/omap4-panda-es.dts @@ -62,3 +62,7 @@ gpios = <&gpio1 8 GPIO_ACTIVE_HIGH>; }; }; + +&gpio1 { + ti,no-reset-on-init; +}; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
