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| author | Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> | 2015-04-20 22:11:16 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2015-04-27 08:09:34 +0200 |
| commit | 301765846ba29fb803c0a4e69c75925b031cdeaf (patch) | |
| tree | 4f22fa8893a65509c4ab08de606518954f87ea14 /include | |
| parent | e1eb43624268f2a2b87423dbe721c735d3e16280 (diff) | |
| download | barebox-301765846ba29fb803c0a4e69c75925b031cdeaf.tar.gz barebox-301765846ba29fb803c0a4e69c75925b031cdeaf.tar.xz | |
spi: Add SPI GPIO bitbang driver
This adds a driver for SPI master by GPIO pins.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/spi/spi_gpio.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/spi/spi_gpio.h b/include/spi/spi_gpio.h new file mode 100644 index 0000000000..841c934f6e --- /dev/null +++ b/include/spi/spi_gpio.h @@ -0,0 +1,36 @@ +/* + * SPI master driver using generic bitbanged GPIO + * + * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> + * + * Based on Linux driver + * Copyright (C) 2006,2008 David Brownell + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __SPI_GPIO_H +#define __SPI_GPIO_H + +#define MAX_CHIPSELECT 4 +#define SPI_GPIO_NO_CS (-1) +#define SPI_GPIO_NO_MISO (-1) +#define SPI_GPIO_NO_MOSI (-1) + +struct gpio_spi_pdata { + int sck; + int mosi; + int miso; + int cs[MAX_CHIPSELECT]; + int num_cs; +}; + +#endif |