• Eric Miao's avatar
    [ARM] pxa: move common GPIO handling code into plat-pxa · 38f539a6
    Eric Miao authored
    1. add common GPIO handling code into [arch/arm/plat-pxa]
    
    2. common code in <mach/gpio.h> moved into <plat/gpio.h>, new processors
       should implement its own <mach/gpio.h>, provide the following required
       definitions and '#include <plat/gpio.h>' in the end:
    
       - GPIO_REGS_VIRT for mapped virtual address of the GPIO registers'
         physical I/O memory
    
       - macros of GPLR(), GPSR(), GPDR() for constant optimization for
         functions gpio_{set,get}_value() (so that bit-bang code can still
         have tolerable performance)
    
       - NR_BUILTIN_GPIO for the number of onchip GPIO
    
       - definitions of __gpio_is_inverted() and __gpio_is_occupied(), they
         can be either macros or inlined functions
    Signed-off-by: default avatarEric Miao <eric.miao@marvell.com>
    38f539a6
gpio.c 8.41 KB