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dm: led: Add support for getting the state of an LED

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It is useful to be able to read the LED as well as write it. Add this to
the uclass and update the GPIO driver.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ziping Chen <techping.chan@gmail.com>
This commit is contained in:
Simon Glass
2017-04-10 11:34:55 -06:00
parent ddae9fcddc
commit 8f4b612333
4 changed files with 50 additions and 0 deletions
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2
test/dm/led.c
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@@ -43,9 +43,11 @@ static int dm_test_led_gpio(struct unit_test_state *uts)
ut_asserteq(0, sandbox_gpio_get_value(gpio, offset));
ut_assertok(led_set_state(dev, LEDST_ON));
ut_asserteq(1, sandbox_gpio_get_value(gpio, offset));
ut_asserteq(LEDST_ON, led_get_state(dev));
ut_assertok(led_set_state(dev, LEDST_OFF));
ut_asserteq(0, sandbox_gpio_get_value(gpio, offset));
ut_asserteq(LEDST_OFF, led_get_state(dev));
return 0;
}