/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __SPI_BITBANG_H #define __SPI_BITBANG_H #include <linux/workqueue.h> struct spi_bitbang { struct mutex lock; u8 busy; u8 use_dma; u8 flags; /* extra spi->mode support */ struct spi_master *master; /* setup_transfer() changes clock and/or wordsize to match settings * for this transfer; zeroes restore defaults from spi_device. */ int (*setup_transfer)(struct spi_device *spi, struct spi_transfer *t); void (*chipselect)(struct spi_device *spi, int is_on); #define BITBANG_CS_ACTIVE 1 /* normally nCS, active low */ #define BITBANG_CS_INACTIVE 0 /* 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); }; /* you can call these default bitbang->master methods from your custom * methods, if you like. */ extern int spi_bitbang_setup(struct spi_device *spi); extern void spi_bitbang_cleanup(struct spi_device *spi); 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 void spi_bitbang_stop(struct spi_bitbang *spi); #endif /* __SPI_BITBANG_H */
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
ad7877.h | File | 835 B | 0644 |
|
adi_spi3.h | File | 15.1 KB | 0644 |
|
ads7846.h | File | 2.02 KB | 0644 |
|
at73c213.h | File | 828 B | 0644 |
|
at86rf230.h | File | 724 B | 0644 |
|
cc2520.h | File | 620 B | 0644 |
|
corgi_lcd.h | File | 460 B | 0644 |
|
ds1305.h | File | 1.08 KB | 0644 |
|
eeprom.h | File | 1.19 KB | 0644 |
|
flash.h | File | 1023 B | 0644 |
|
ifx_modem.h | File | 616 B | 0644 |
|
l4f00242t03.h | File | 847 B | 0644 |
|
libertas_spi.h | File | 907 B | 0644 |
|
lms283gf05.h | File | 775 B | 0644 |
|
max7301.h | File | 939 B | 0644 |
|
mc33880.h | File | 196 B | 0644 |
|
mcp23s08.h | File | 685 B | 0644 |
|
mmc_spi.h | File | 1.91 KB | 0644 |
|
mxs-spi.h | File | 5.24 KB | 0644 |
|
pxa2xx_spi.h | File | 1.5 KB | 0644 |
|
rspi.h | File | 715 B | 0644 |
|
s3c24xx.h | File | 816 B | 0644 |
|
sh_hspi.h | File | 572 B | 0644 |
|
sh_msiof.h | File | 357 B | 0644 |
|
spi-fsl-dspi.h | File | 955 B | 0644 |
|
spi.h | File | 50.33 KB | 0644 |
|
spi_bitbang.h | File | 1.43 KB | 0644 |
|
spi_gpio.h | File | 2.56 KB | 0644 |
|
spi_oc_tiny.h | File | 628 B | 0644 |
|
tdo24m.h | File | 210 B | 0644 |
|
tle62x0.h | File | 660 B | 0644 |
|
xilinx_spi.h | File | 627 B | 0644 |
|