diff options
Diffstat (limited to 'include/linux/spi/spi_bitbang.h')
| -rw-r--r-- | include/linux/spi/spi_bitbang.h | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/include/linux/spi/spi_bitbang.h b/include/linux/spi/spi_bitbang.h index f987a2bee16a..c92cd43a47f4 100644 --- a/include/linux/spi/spi_bitbang.h +++ b/include/linux/spi/spi_bitbang.h @@ -1,19 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __SPI_BITBANG_H #define __SPI_BITBANG_H #include <linux/workqueue.h> -struct spi_bitbang { - struct workqueue_struct *workqueue; - struct work_struct work; +typedef u32 (*spi_bb_txrx_word_fn)(struct spi_device *, unsigned int, u32, u8, unsigned int); - spinlock_t lock; - struct list_head queue; +struct spi_bitbang { + struct mutex lock; u8 busy; u8 use_dma; - u8 flags; /* extra spi->mode support */ + u16 flags; /* extra spi->mode support */ - struct spi_master *master; + struct spi_controller *ctlr; /* setup_transfer() changes clock and/or wordsize to match settings * for this transfer; zeroes restore defaults from spi_device. @@ -25,15 +24,16 @@ struct spi_bitbang { #define BITBANG_CS_ACTIVE 1 /* normally nCS, active low */ #define BITBANG_CS_INACTIVE 0 + void (*set_mosi_idle)(struct spi_device *spi); /* txrx_bufs() may handle dma mapping for transfers that don't * already have one (transfer.{tx,rx}_dma is zero), or use PIO */ int (*txrx_bufs)(struct spi_device *spi, struct spi_transfer *t); /* txrx_word[SPI_MODE_*]() just looks like a shift register */ - u32 (*txrx_word[4])(struct spi_device *spi, - unsigned nsecs, - u32 word, u8 bits); + spi_bb_txrx_word_fn txrx_word[SPI_MODE_X_MASK + 1]; + + int (*set_line_direction)(struct spi_device *spi, bool output); }; /* you can call these default bitbang->master methods from your custom @@ -41,12 +41,12 @@ struct spi_bitbang { */ extern int spi_bitbang_setup(struct spi_device *spi); extern void spi_bitbang_cleanup(struct spi_device *spi); -extern int spi_bitbang_transfer(struct spi_device *spi, struct spi_message *m); extern int spi_bitbang_setup_transfer(struct spi_device *spi, struct spi_transfer *t); /* start or stop queue processing */ extern int spi_bitbang_start(struct spi_bitbang *spi); -extern int spi_bitbang_stop(struct spi_bitbang *spi); +extern int spi_bitbang_init(struct spi_bitbang *spi); +extern void spi_bitbang_stop(struct spi_bitbang *spi); #endif /* __SPI_BITBANG_H */ |