• Shawn Guo's avatar
    pinctrl: imx: move hard-coding data into device tree · e1641531
    Shawn Guo authored
    Currently, all imx pinctrl drivers maintain a big array of struct
    imx_pin_reg which hard-codes data like register offset and mux mode
    setting for each pin function.  Every time a new imx SoC support is
    added, we need to add such a big mount of data.  With moving to single
    kernel build, it's only matter of time to be blamed on memory consuming.
    With DTC pre-processor support in place, the patch moves all these data
    into device tree by redefining the PIN_FUNC_ID in imxXX-pinfunc.h and
    changing the PIN_FUNC_ID parsing code a little bit.
    The pin id gets re-numbered based on mux register offset, or config
    register offset if the pin has no mux register, so that kernel can
    identify the pin id from register offsets provided by device tree.
    As a bonus point of the change, those arbitrary magic numbers standing
    for particular PIN_FUNC_ID in device tree sources are now replaced by
    macros to improve the readability of dts files.
    Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
    Acked-by: default avatarDong Aisheng <dong.aisheng@linaro.org>
    Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
pinctrl-imx51.c 24.9 KB