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kernel add
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#ifndef ASMARM_ARCH_MMC_H
#define ASMARM_ARCH_MMC_H
#include <linux/mmc/host.h>
struct device;
/* board specific SDHC data, optional.
* If not present, a writable card with 3,3V is assumed.
*/
struct imxmmc_platform_data {
/* Return values for the get_ro callback should be:
* 0 for a read/write card
* 1 for a read-only card
* -ENOSYS when not supported (equal to NULL callback)
* or a negative errno value when something bad happened
*/
int (*get_ro)(struct device *);
/* board specific hook to (de)initialize the SD slot.
* The board code can call 'handler' on a card detection
* change giving data as argument.
*/
int (*init)(struct device *dev, irq_handler_t handler, void *data);
void (*exit)(struct device *dev, void *data);
/* available voltages. If not given, assume
* MMC_VDD_32_33 | MMC_VDD_33_34
*/
unsigned int ocr_avail;
/* adjust slot voltage */
void (*setpower)(struct device *, unsigned int vdd);
/* enable card detect using DAT3 */
int dat3_card_detect;
};
#endif
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