diff options
Diffstat (limited to 'kernel/include/linux/spi/mmc_spi.h')
| -rw-r--r-- | kernel/include/linux/spi/mmc_spi.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/kernel/include/linux/spi/mmc_spi.h b/kernel/include/linux/spi/mmc_spi.h new file mode 100644 index 000000000..274bc0fa0 --- /dev/null +++ b/kernel/include/linux/spi/mmc_spi.h @@ -0,0 +1,64 @@ +#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 */ |