This patch set re-introduces the gpio hogging concept first presented by Boris Brezillion. This patch set provides a way to initally configure specific GPIO when the gpio controller is probed.
The actual DT scanning to collect the GPIO specific data is performed as part of the gpiochip_add(). The purpose of this is to allows specific GPIOs to be configured without any driver specific code. This particularly useful because board design are getting increasingly complex and given SoC pins can now have upward of 10 mux values a lot of connections are now dependent on external IO muxes to switch various modes and combination. Specific drivers should not necessarily need to be aware of what accounts to a specific board implementation. This board level "description" should be best kept as part of the dts file. Changes since v1: * Split the devicetree bindings documentation in its own patch. * Refactor the gpio-hog mechanism as private functions meant to be to invoked from of_gpiochip_add(). Benoit Parrot (2): gpio: add GPIO hogging mechanism gpio: Document GPIO hogging mechanism Documentation/devicetree/bindings/gpio/gpio.txt | 25 ++++ drivers/gpio/gpiolib-of.c | 188 ++++++++++++++++++++++++ 2 files changed, 213 insertions(+) -- 1.8.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
