include/linux/spi/mmc_spi.h

   1 #ifndef __LINUX_SPI_MMC_SPI_H
   2 #define __LINUX_SPI_MMC_SPI_H
   3
   4 #include <linux/device.h>
   5 #include <linux/spi/spi.h>
   6 #include <linux/interrupt.h>
   7
   8 struct mmc_host;
   9
  10 /* Put this in platform_data of a device being used to manage an MMC/SD
  11  * card slot.  (Modeled after PXA mmc glue; see that for usage examples.)
  12  *
  13  * REVISIT This is not a spi-specific notion.  Any card slot should be
  14  * able to handle it.  If the MMC core doesn't adopt this kind of notion,
  15  * switch the "struct device *" parameters over to "struct spi_device *".
  16  */
  17 struct mmc_spi_platform_data {
  18         /* driver activation and (optional) card detect irq hookup */
  19         int (*init)(struct device *,
  20                 irqreturn_t (*)(int, void *),
  21                 void *);
  22         void (*exit)(struct device *, void *);
  23
  24         /* sense switch on sd cards */
  25         int (*get_ro)(struct device *);
  26
  27         /*
  28          * If board does not use CD interrupts, driver can optimize polling
  29          * using this function.
  30          */
  31         int (*get_cd)(struct device *);
  32
  33         /* Capabilities to pass into mmc core (e.g. MMC_CAP_NEEDS_POLL). */
  34         unsigned long caps;
  35
  36         /* how long to debounce card detect, in msecs */
  37         u16 detect_delay;
  38
  39         /* power management */
  40         u16 powerup_msecs;              /* delay of up to 250 msec */
  41         u32 ocr_mask;                   /* available voltages */
  42         void (*setpower)(struct device *, unsigned int maskval);
  43 };
  44
  45 #ifdef CONFIG_OF
  46 extern struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi);
  47 extern void mmc_spi_put_pdata(struct spi_device *spi);
  48 #else
  49 static inline struct mmc_spi_platform_data *
  50 mmc_spi_get_pdata(struct spi_device *spi)
  51 {
  52         return spi->dev.platform_data;
  53 }
  54 static inline void mmc_spi_put_pdata(struct spi_device *spi) {}
  55 #endif /* CONFIG_OF */
  56
  57 #endif /* __LINUX_SPI_MMC_SPI_H */