diff options
Diffstat (limited to 'include/linux/spi/spi.h')
| -rw-r--r-- | include/linux/spi/spi.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 1f03483f61e5..072cb2aa2413 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -312,8 +312,9 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) * @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 @@ -446,6 +447,9 @@ struct spi_master { */ 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; @@ -1143,6 +1147,8 @@ static inline ssize_t spi_w8r16be(struct spi_device *spi, u8 cmd) * @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; @@ -1155,6 +1161,8 @@ struct spi_flash_read_message { 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 */ |