diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/plat-s3c24xx/include/plat/mci.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c24xx/include/plat/mci.h b/arch/arm/plat-s3c24xx/include/plat/mci.h index c2cef613968..36aaa10fad0 100644 --- a/arch/arm/plat-s3c24xx/include/plat/mci.h +++ b/arch/arm/plat-s3c24xx/include/plat/mci.h @@ -1,6 +1,31 @@ #ifndef _ARCH_MCI_H #define _ARCH_MCI_H +/** + * struct s3c24xx_mci_pdata - sd/mmc controller platform data + * @no_wprotect: Set this to indicate there is no write-protect switch. + * @no_detect: Set this if there is no detect switch. + * @wprotect_invert: Invert the default sense of the write protect switch. + * @detect_invert: Invert the default sense of the write protect switch. + * @use_dma: Set to allow the use of DMA. + * @gpio_detect: GPIO number for the card detect line. + * @gpio_wprotect: GPIO number for the write protect line. + * @ocr_avail: The mask of the available power states, non-zero to use. + * @set_power: Callback to control the power mode. + * + * The @gpio_detect is used for card detection when @no_wprotect is unset, + * and the default sense is that 0 returned from gpio_get_value() means + * that a card is inserted. If @detect_invert is set, then the value from + * gpio_get_value() is inverted, which makes 1 mean card inserted. + * + * The driver will use @gpio_wprotect to signal whether the card is write + * protected if @no_wprotect is not set. A 0 returned from gpio_get_value() + * means the card is read/write, and 1 means read-only. The @wprotect_invert + * will invert the value returned from gpio_get_value(). + * + * Card power is set by @ocr_availa, using MCC_VDD_ constants if it is set + * to a non-zero value, otherwise the default of 3.2-3.4V is used. + */ struct s3c24xx_mci_pdata { unsigned int no_wprotect : 1; unsigned int no_detect : 1; |