54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/*
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* spi_gpio interface to platform code
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*
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* Copyright (c) 2008 Piotr Skamruk
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _LINUX_SPI_SPI_GPIO
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#define _LINUX_SPI_SPI_GPIO
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#include <linux/types.h>
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#include <linux/spi/spi.h>
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/** struct spi_gpio_platform_data - Data definitions for a SPI-GPIO device.
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* This structure holds information about a GPIO-based SPI device.
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*
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* @pin_clk: The GPIO pin number of the CLOCK pin.
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*
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* @pin_miso: The GPIO pin number of the MISO pin.
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*
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* @pin_mosi: The GPIO pin number of the MOSI pin.
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*
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* @pin_cs: The GPIO pin number of the CHIPSELECT pin.
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*
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* @cs_activelow: If true, the chip is selected when the CS line is low.
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*
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* @no_spi_delay: If true, no delay is done in the lowlevel bitbanging.
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* Note that doing no delay is not standards compliant,
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* but it might be needed to speed up transfers on some
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* slow embedded machines.
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*
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* @boardinfo_setup: This callback is called after the
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* SPI master device was registered, but before the
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* device is registered.
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* @boardinfo_setup_data: Data argument passed to boardinfo_setup().
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*/
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struct spi_gpio_platform_data {
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unsigned int pin_clk;
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unsigned int pin_miso;
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unsigned int pin_mosi;
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unsigned int pin_cs;
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bool cs_activelow;
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bool no_spi_delay;
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int (*boardinfo_setup)(struct spi_board_info *bi,
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struct spi_master *master,
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void *data);
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void *boardinfo_setup_data;
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};
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#endif /* _LINUX_SPI_SPI_GPIO */
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