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Diffstat (limited to 'include/linux/atmel-mci.h')
| -rw-r--r-- | include/linux/atmel-mci.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/include/linux/atmel-mci.h b/include/linux/atmel-mci.h new file mode 100644 index 000000000..1491af38c --- /dev/null +++ b/include/linux/atmel-mci.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __LINUX_ATMEL_MCI_H +#define __LINUX_ATMEL_MCI_H + +#include <linux/types.h> +#include <linux/dmaengine.h> + +#define ATMCI_MAX_NR_SLOTS 2 + +/** + * struct mci_slot_pdata - board-specific per-slot configuration + * @bus_width: Number of data lines wired up the slot + * @detect_pin: GPIO pin wired to the card detect switch + * @wp_pin: GPIO pin wired to the write protect sensor + * @detect_is_active_high: The state of the detect pin when it is active + * @non_removable: The slot is not removable, only detect once + * + * If a given slot is not present on the board, @bus_width should be + * set to 0. The other fields are ignored in this case. + * + * Any pins that aren't available should be set to a negative value. + * + * Note that support for multiple slots is experimental -- some cards + * might get upset if we don't get the clock management exactly right. + * But in most cases, it should work just fine. + */ +struct mci_slot_pdata { + unsigned int bus_width; + int detect_pin; + int wp_pin; + bool detect_is_active_high; + bool non_removable; +}; + +/** + * struct mci_platform_data - board-specific MMC/SDcard configuration + * @dma_slave: DMA slave interface to use in data transfers. + * @slot: Per-slot configuration data. + */ +struct mci_platform_data { + void *dma_slave; + dma_filter_fn dma_filter; + struct mci_slot_pdata slot[ATMCI_MAX_NR_SLOTS]; +}; + +#endif /* __LINUX_ATMEL_MCI_H */ |