From: Patrick Bruenn <>

main usecase in mind are LEDs which indicate a state like "power on".
With this patchset applied, all you have to do is:
Add a gpio-led node with 'default-state = "on";' property to your device
tree. And the LED will automatically light up during U-Boot startup.

Changes in v4:
- don't break 'make tests'
- gpio_a pin 4 is already use by dm_test_gpio_phandles() -> we switch to
  use pin 5 and 6
- adjust dm_test_led_base() to the fact that we have two more LEDs, now
- rebased on 2600df4f8ef12ece9cec13030005919e0ba2b0d5 (master

Changes in v3:
- use ofnode_read_bool() instead of ofnode_read_string() to determine if
  LED node has the default-state property

Changes in v2:
- rebase to v2018.05-rc1
- add dm_test_led_default_state() to tests/dm/led.c

Patrick Bruenn (3):
  dm: led: Support "default-state" property
  dm: led: auto probe() LEDs with "default-state"
  dm: led: add testcase for "default-state" property

 arch/sandbox/dts/test.dts | 12 ++++++++++++
 drivers/led/led_gpio.c    | 25 ++++++++++++++++++++++++-
 test/dm/led.c             | 20 +++++++++++++++++++-
 3 files changed, 55 insertions(+), 2 deletions(-)


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