root/include/linux/spi/mmc_spi.h

DEFINITIONS

1. mmc_spi_get_pdata
2. mmc_spi_put_pdata

#ifndef __LINUX_SPI_MMC_SPI_H
#define __LINUX_SPI_MMC_SPI_H

#include <linux/spi/spi.h>
#include <linux/interrupt.h>

struct device;
struct mmc_host;

#define MMC_SPI_USE_CD_GPIO                     (1 << 0)
#define MMC_SPI_USE_RO_GPIO                     (1 << 1)
#define MMC_SPI_CD_GPIO_ACTIVE_LOW              (1 << 2)
#define MMC_SPI_RO_GPIO_ACTIVE_LOW              (1 << 3)

/* Put this in platform_data of a device being used to manage an MMC/SD
 * card slot.  (Modeled after PXA mmc glue; see that for usage examples.)
 *
 * REVISIT This is not a spi-specific notion.  Any card slot should be
 * able to handle it.  If the MMC core doesn't adopt this kind of notion,
 * switch the "struct device *" parameters over to "struct spi_device *".
 */
struct mmc_spi_platform_data {
        /* driver activation and (optional) card detect irq hookup */
        int (*init)(struct device *,
                irqreturn_t (*)(int, void *),
                void *);
        void (*exit)(struct device *, void *);

        /*
         * Card Detect and Read Only GPIOs. To enable debouncing on the card
         * detect GPIO, set the cd_debounce to the debounce time in
         * microseconds.
         */
        unsigned int flags;
        unsigned int cd_gpio;
        unsigned int cd_debounce;
        unsigned int ro_gpio;

        /* Capabilities to pass into mmc core (e.g. MMC_CAP_NEEDS_POLL). */
        unsigned long caps;
        unsigned long caps2;

        /* how long to debounce card detect, in msecs */
        u16 detect_delay;

        /* power management */
        u16 powerup_msecs;              /* delay of up to 250 msec */
        u32 ocr_mask;                   /* available voltages */
        void (*setpower)(struct device *, unsigned int maskval);
};

#ifdef CONFIG_OF
extern struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi);
extern void mmc_spi_put_pdata(struct spi_device *spi);
#else
static inline struct mmc_spi_platform_data *
mmc_spi_get_pdata(struct spi_device *spi)
{
        return spi->dev.platform_data;
}
static inline void mmc_spi_put_pdata(struct spi_device *spi) {}
#endif /* CONFIG_OF */

#endif /* __LINUX_SPI_MMC_SPI_H */