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05/09/2024 07:14:16 AM
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ad7877.h
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adi_spi3.h
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ads7846.h
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at73c213.h
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cc2520.h
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corgi_lcd.h
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ds1305.h
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eeprom.h
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flash.h
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ifx_modem.h
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l4f00242t03.h
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libertas_spi.h
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lms283gf05.h
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max7301.h
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mc33880.h
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mcp23s08.h
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mmc_spi.h
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mxs-spi.h
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pxa2xx_spi.h
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rspi.h
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s3c24xx.h
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sh_hspi.h
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sh_msiof.h
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spi-fsl-dspi.h
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spi.h
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spi_bitbang.h
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spi_gpio.h
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spi_oc_tiny.h
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tdo24m.h
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tle62x0.h
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xilinx_spi.h
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Editing: spi_bitbang.h
Close
/* 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 */