diff options
| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2013-08-08 12:38:32 +0200 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2013-08-24 23:45:22 -0400 |
| commit | bf287a90ceedf86e3313ba0dcff606ac5399b39a (patch) | |
| tree | a3337495e68fde2270c406574774a283c0b4e002 /include/linux/spi | |
| parent | 214fc309d1387e822d606a33a10e31cacfe83520 (diff) | |
mmc: mmc_spi: Support CD/RO GPIOs
Add support for passing CD/RO GPIO numbers directly to the mmc_spi
driver instead of relying solely on board code callbacks to retrieve the
CD/RO signals values. The driver will enable debouncing on the card
detect GPIO if the cd_debounce field is set to a non-zero value.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'include/linux/spi')
| -rw-r--r-- | include/linux/spi/mmc_spi.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/spi/mmc_spi.h b/include/linux/spi/mmc_spi.h index 32be8dbdf19..87cdb35bedd 100644 --- a/include/linux/spi/mmc_spi.h +++ b/include/linux/spi/mmc_spi.h @@ -7,6 +7,11 @@ 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.) * @@ -30,8 +35,19 @@ struct mmc_spi_platform_data { */ int (*get_cd)(struct device *); + /* + * 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; |