The main idea of this patchset was to add the dt-based GPIOs support in i2c-mux-gpio driver. In particular we needed to have the full GPIOs specifier being handled including the dt-flags like GPIO_ACTIVE_HIGH, GPIO_ACTIVE_LOW, etc. Due to using a legacy GPIO interface the former driver implementation didn't provide this ability.
On the way of adding the full dt-GPIO flags support a small set of refactorings has been done in order to keep the platform_data-based systems support, make the code more readable and the alterations - clearer. In general the whole changes might be considered as the plat- and dt- specific code split up. In first patch we unpinned the platform-specific method of GPIO-chip probing. The second patch makes the driver to return an error if of-based (last resort path) failed to retrieve the driver private data. The next three patches is the sequence of initial channel info retrieval, platform_data-specific code isolation and finally full dt-based GPIOs request method introduction. The last patch does what we inteded this patchset for in the first place - adds the full dt-GPIO specifiers support. Serge Semin (5): i2c-mux-gpio: Unpin a platform-based device initialization i2c-mux-gpio: Return an error if no config data found i2c-mux-gpio: Save initial channel number to the idle data field i2c-mux-gpio: Unpin the platform-specific GPIOs request code i2c-mux-gpio: Create of-based GPIOs request method drivers/i2c/muxes/i2c-mux-gpio.c | 224 ++++++++++++++++++++----------- 1 file changed, 146 insertions(+), 78 deletions(-) -- 2.21.0
