Add support for toggling an LED into the uclass interface. This can be efficiently implemented by the driver.
Signed-off-by: Simon Glass sjg@chromium.org ---
drivers/led/led_gpio.c | 7 +++++++ include/led.h | 1 + test/dm/led.c | 25 +++++++++++++++++++++++++ 3 files changed, 33 insertions(+)
diff --git a/drivers/led/led_gpio.c b/drivers/led/led_gpio.c index 789d15600f..4106ecb679 100644 --- a/drivers/led/led_gpio.c +++ b/drivers/led/led_gpio.c @@ -21,6 +21,7 @@ struct led_gpio_priv { static int gpio_led_set_state(struct udevice *dev, enum led_state_t state) { struct led_gpio_priv *priv = dev_get_priv(dev); + int ret;
if (!dm_gpio_is_valid(&priv->gpio)) return -EREMOTEIO; @@ -28,6 +29,12 @@ static int gpio_led_set_state(struct udevice *dev, enum led_state_t state) case LEDST_OFF: case LEDST_ON: break; + case LEDST_TOGGLE: + ret = dm_gpio_get_value(&priv->gpio); + if (ret < 0) + return ret; + state = !ret; + break; default: return -ENOSYS; } diff --git a/include/led.h b/include/led.h index bbab4d14c9..84a365228f 100644 --- a/include/led.h +++ b/include/led.h @@ -20,6 +20,7 @@ struct led_uc_plat { enum led_state_t { LEDST_OFF = 0, LEDST_ON = 1, + LEDST_TOGGLE = 2,
LEDST_COUNT, }; diff --git a/test/dm/led.c b/test/dm/led.c index 68aa39bd4d..2cc24127e2 100644 --- a/test/dm/led.c +++ b/test/dm/led.c @@ -53,6 +53,31 @@ static int dm_test_led_gpio(struct unit_test_state *uts) } DM_TEST(dm_test_led_gpio, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+/* Test that we can toggle LEDs */ +static int dm_test_led_toggle(struct unit_test_state *uts) +{ + const int offset = 1; + struct udevice *dev, *gpio; + + /* + * Check that we can manipulate an LED. LED 1 is connected to GPIO + * bank gpio_a, offset 1. + */ + ut_assertok(uclass_get_device(UCLASS_LED, 1, &dev)); + ut_assertok(uclass_get_device(UCLASS_GPIO, 1, &gpio)); + ut_asserteq(0, sandbox_gpio_get_value(gpio, offset)); + ut_assertok(led_set_state(dev, LEDST_TOGGLE)); + ut_asserteq(1, sandbox_gpio_get_value(gpio, offset)); + ut_asserteq(LEDST_ON, led_get_state(dev)); + + ut_assertok(led_set_state(dev, LEDST_TOGGLE)); + ut_asserteq(0, sandbox_gpio_get_value(gpio, offset)); + ut_asserteq(LEDST_OFF, led_get_state(dev)); + + return 0; +} +DM_TEST(dm_test_led_toggle, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); + /* Test obtaining an LED by label */ static int dm_test_led_label(struct unit_test_state *uts) {