• Linus Walleij's avatar
    tty: serial: ifx6x60: Convert to GPIO descriptors · 9a8da608
    Linus Walleij authored
    This driver for the Intel MID never seems to have been properly
    integrated upstream: the platform data in <linux/spi/ifx_modem.h>
    is not used anywhere in the kernel and haven't been since it was
    merged into the kernel in 2010.
    
    There might be out-of-tree users, so I don't want to delete the
    driver, but I will refactor it to use GPIO descriptors, which
    means that out-of-tree users will need to adapt.
    
    There are several examples in the kernel of how to provide the
    resources necessary for using GPIO descriptors to pass in the
    GPIO lines, for the MID platform in particular, it will suffice
    to inspect the code in files like:
    arch/x86/platform/intel-mid/device_libs/platform_bt.c
    
    This refactoring transfers all GPIOs in the driver, including
    a hard-coded "PMU reset" in the driver to use GPIO descriptors
    instead.
    
    The following named GPIO descriptors need to be supplied:
    - reset
    - power
    - mrdy
    - srdy
    - rst_out
    - pmu_reset
    
    Cc: Russ Gorby <russ.gorby@intel.com>
    Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
    Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
    Link: https://lore.kernel.org/r/20200311083131.693908-2-linus.walleij@linaro.orgSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    9a8da608
ifx6x60.c 35.9 KB