• Simon Glass's avatar
    dm: gpio: Allow control of GPIO uclass in SPL · bcee8d67
    Simon Glass authored
    At present if CONFIG_SPL_GPIO_SUPPORT is enabled then the GPIO uclass
    is included in SPL/TPL without any control for boards. Some boards may
    want to disable this to reduce code size where GPIOs are not needed in
    SPL or TPL.
    
    Add a new Kconfig option to permit this. Default it to 'y' so that
    existing boards work correctly.
    
    Change existing uses of CONFIG_DM_GPIO to CONFIG_IS_ENABLED(DM_GPIO) to
    preserve the current behaviour. Also update the 74x164 GPIO driver since
    it cannot build with SPL.
    
    This allows us to remove the hacks in config_uncmd_spl.h and
    Makefile.uncmd_spl (eventually those files should be removed).
    Signed-off-by: Simon Glass's avatarSimon Glass <sjg@chromium.org>
    Reviewed-by: Bin Meng's avatarBin Meng <bmeng.cn@gmail.com>
    bcee8d67