[PATCH v2 0/2] gpio: add gpio open-drain & open-source emulation

When a line is in open-drain or open-source mode, U-Boot doesn't handle it directly.

Let's add gpio open-drain & open-source emulation in gpio u-class to make it transparent to driver using a gpio line from DT.

Changes since v1: - fixed all open-drain/open source cases - updated dm gpio test

Neil Armstrong (2): gpio: emulate open drain & open source in dm_gpio_set_value() test: dm: update test for open-drain/open-source emulation in gpio-uclass

arch/sandbox/dts/test.dts | 4 +- drivers/gpio/gpio-uclass.c | 15 +++++++ test/dm/gpio.c | 89 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 107 insertions(+), 1 deletion(-)