servo_micro: add gpio mode get and set

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>

1 files changed, 9 insertions, 0 deletions

diff --git a/common/gpio.c b/common/gpio.c
index 817662f743..f4e3cfe2b8 100644
--- a/common/gpio.c
+++ b/common/gpio.c
@@ -113,6 +113,15 @@ void gpio_set_flags(enum gpio_signal signal, int flags)
 	gpio_set_flags_by_mask(g->port, g->mask, flags);
 }
 
+#ifdef CONFIG_CMD_GPIO_EXTENDED
+int gpio_get_flags(enum gpio_signal signal)
+{
+	const struct gpio_info *g = gpio_list + signal;
+
+	return gpio_get_flags_by_mask(g->port, g->mask);
+}
+#endif
+
 int gpio_get_default_flags(enum gpio_signal signal)
 {
 	return gpio_list[signal].flags;