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    Subject[patch 2.6.20-rc1 2/6] OMAP GPIO wrappers
    Date
    This teaches OMAP how to implement the cross-platform GPIO interfaces.

    Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>


    Index: at91/include/asm-arm/arch-omap/gpio.h
    ===================================================================
    --- at91.orig/include/asm-arm/arch-omap/gpio.h 2006-12-19 01:45:33.000000000 -0800
    +++ at91/include/asm-arm/arch-omap/gpio.h 2006-12-19 02:06:11.000000000 -0800
    @@ -76,4 +76,58 @@ extern void omap_set_gpio_direction(int
    extern void omap_set_gpio_dataout(int gpio, int enable);
    extern int omap_get_gpio_datain(int gpio);

    +/*-------------------------------------------------------------------------*/
    +
    +/* wrappers for "new style" GPIO calls. the old OMAP-specfic ones should
    + * eventually be removed (along with this errno.h inclusion), and maybe
    + * gpios should put MPUIOs last too.
    + */
    +
    +#include <asm/errno.h>
    +
    +static inline int gpio_request(unsigned gpio, const char *label)
    + { return omap_request_gpio(gpio); }
    +
    +static inline void gpio_free(unsigned gpio)
    + { omap_free_gpio(gpio); }
    +
    +
    +static inline int __gpio_set_direction(unsigned gpio, int is_input)
    +{
    + if (cpu_class_is_omap2()) {
    + if (gpio > OMAP_MAX_GPIO_LINES)
    + return -EINVAL;
    + } else {
    + if (gpio > (OMAP_MAX_GPIO_LINES + 16 /* MPUIO */))
    + return -EINVAL;
    + }
    + omap_set_gpio_direction(gpio, is_input);
    + return 0;
    +}
    +
    +static inline int gpio_direction_input(unsigned gpio)
    + { return __gpio_set_direction(gpio, 1); }
    +
    +static inline int gpio_direction_output(unsigned gpio)
    + { return __gpio_set_direction(gpio, 0); }
    +
    +
    +static inline int gpio_get_value(unsigned gpio)
    + { return omap_get_gpio_datain(gpio); }
    +
    +static inline void gpio_set_value(unsigned gpio, int value)
    + { omap_set_gpio_dataout(gpio, value); }
    +
    +#include <asm-generic/gpio.h> /* cansleep wrappers */
    +
    +static inline int gpio_to_irq(unsigned gpio)
    + { return OMAP_GPIO_IRQ(gpio); }
    +
    +static inline int irq_to_gpio(unsigned irq)
    +{
    + if (cpu_class_is_omap1() && (irq < (IH_MPUIO_BASE + 16)))
    + return (irq - IH_MPUIO_BASE) + OMAP_MAX_GPIO_LINES;
    + return irq - IH_GPIO_BASE;
    +}
    +
    #endif
    -
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