* @flags: other constraints relevant to this driver
* @max_transfer_size: function that returns the max transfer size for
* a &spi_device; may be %NULL, so the default %SIZE_MAX will be used.
+ * @io_mutex: mutex for physical bus access
* @bus_lock_spinlock: spinlock for SPI bus locking
- * @bus_lock_mutex: mutex for SPI bus locking
+ * @bus_lock_mutex: mutex for exclusion of multiple callers
* @bus_lock_flag: indicates that the SPI bus is locked for exclusive use
* @setup: updates the device mode and clocking records used by a
* device's SPI controller; protocol code may call this. This
*/
size_t (*max_transfer_size)(struct spi_device *spi);
+ /* I/O mutex */
+ struct mutex io_mutex;
+
/* lock and mutex for SPI bus locking */
spinlock_t bus_lock_spinlock;
struct mutex bus_lock_mutex;
* @opcode_nbits: number of lines to send opcode
* @addr_nbits: number of lines to send address
* @data_nbits: number of lines for data
+ * @rx_sg: Scatterlist for receive data read from flash
+ * @cur_msg_mapped: message has been mapped for DMA
*/
struct spi_flash_read_message {
void *buf;
u8 opcode_nbits;
u8 addr_nbits;
u8 data_nbits;
+ struct sg_table rx_sg;
+ bool cur_msg_mapped;
};
/* SPI core interface for flash read support */