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GPIO console commands currently only show input voltage level, and can only set level on predefined outputs. This change allows GPIOs to be cycled between output, input, and alternate function, as well as displaying the mode and asserted level (if any) in gpioget. This change creates CONFIG_CMD_GPIO_EXTENDED as the internal gpio interface needs to be changed to support this, and I can't test the other architectures. It may be worthwhile to add this for all, or not. This change is also necessary also for servo micro JTAG and PD UART support, as several pins are tied together on the flex and stm32 outputs need to be variously active or in high-z depending on mode. BUG=chromium:571477 TEST=gpioget <0|1|IN|A|ALT>; gpioget; BRANCH=None Change-Id: Iba32992db6244ee1e654db840d1c9c11dd2a0993 Signed-off-by: Nick Sanders <nsanders@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/338885 Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly