On Mon, Apr 24, 2017 at 6:08 PM, Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > These codecs have a variable number of I/O lines each of which > is individually selectable to a wide range of possible functions. > > The functionality is slightly different from the traditional muxed > GPIO since most of the functions can be mapped to any pin (and even > the same function to multiple pins). Most pins have a dedicated > "alternate" function that is only available on that pin. The > alternate functions are usually a group of signals, though it is > not always necessary to enable the full group, depending on the > alternate function and how it is to be used. The mapping between > alternate functions and GPIO pins varies between codecs depending > on the number of alternate functions and available pins. > > Note on the Kconfig options: > The formula "default y if..." is used for PINCTRL_MADERA so that its > select options will be processed, allowing us to group selects for > pinctrl into the pinctrl Kconfig where they logically belong instead > of accumulating under the parent MFD Kconfig. > > Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxxxxxxxx> > --- > Changes since V1: > - dt binding moved to separate patch > - moved all source into a subdirectory drivers/pinctrl/cirrus > - split chip-specific tables into separate files > - codec-specific build options are now selected from MFD > - print useful information from madera_pin_dbg_show() > - added gpio_set_direciton / gpio_request_enable / gpio_disable_free functions > - added strict mode so GPIO and other functions are exclusive > - replace #ifdefs with if (IS_ENABLED(...)) in probe > - fixed bug reading registers in madera_pin_conf_get() Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx> I guess you will apply this through MFD, so waiting for Lee to pick it up. Alternatively I can apply it after the MFD core parts are upstream. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
