Hello, As we started discussing in [1], it would be useful to have a way to configure pull-up/pull-down resistors for simple GPIO controllers that don't have any pinmuxing capability, and therefore no interaction with the pinctrl subsystem. This set of patches implements what I understood of Linus option (2), i.e extend the ->set_config() callback, and provide additional flags that can be used in the Device Tree: GPIO_PULL_UP and GPIO_PULL_DOWN. Let me know what you think about this proposal. Thanks for your feedback. Thomas [1] https://marc.info/?l=linux-gpio&m=154491873506701&w=2 Thomas Petazzoni (4): dt-bindings: gpio: document the new pull-up/pull-down flags gpio: rename gpio_set_drive_single_ended() to gpio_set_config() gpio: add core support for pull-up/pull-down configuration gpio: pca953x: add ->set_config implementation .../devicetree/bindings/gpio/gpio.txt | 4 ++ drivers/gpio/gpio-pca953x.c | 59 ++++++++++++++++++- drivers/gpio/gpiolib-of.c | 5 ++ drivers/gpio/gpiolib.c | 40 ++++++++----- drivers/gpio/gpiolib.h | 2 + include/dt-bindings/gpio/gpio.h | 6 ++ include/linux/gpio/machine.h | 2 + include/linux/of_gpio.h | 2 + 8 files changed, 104 insertions(+), 16 deletions(-) -- 2.20.1
