The main idea of this patchset was to add the full dt GPIOs specifier support in i2c-mux-gpio driver. In particular we needed to have the full GPIOs specifier being handled including the flags like GPIO_ACTIVE_HIGH, GPIO_ACTIVE_LOW, GPIO_PUSH_PULL, GPIO_OPEN_DRAIN or GPIO_OPEN_SOURCE. 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 the first patch we unpinned the platform-specific method of GPIO-chip probing. The second patch introduces a new initial_state value field into the "gpiomux" structure. The third one is responsible for GPIO request loop isoltaing into a dedicated function. At this stage common it is a common function for both dt- and plat- code paths. Finally last patch introduces a full dt-based GPIOs request method, which uses gpiod_get_from_of_node() method in order to parse the corresponding dt GPIO specifiers with their falgs. The last patch does what we inteded this patchset for in the first place - adds the full dt-GPIO specifiers support. Changelog v2 - Remove fallback pattern when selecting the dt- or plat-based code paths. (Cause the patch "i2c-mux-gpio: Return an error if no onfig data found" removal.) - Use a dedicated initial_state variable to keep the initial channels selector state. (Causes the patch "i2c-mux-gpio: Save initial channel number to the idle" removal.) - Mention open-drain, open-source flags in the patchset descriptions. Serge Semin (3): i2c-mux-gpio: Unpin a platform-based device initialization 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 | 226 ++++++++++++++++++++----------- 1 file changed, 146 insertions(+), 80 deletions(-) -- 2.21.0
