linux/arch/arm/plat-mxc/include/mach/spi.h
Sascha Hauer b5f3294f0b spi: add SPI driver for most known i.MX SoCs
This driver has been tested on i.MX1/i.MX27/i.MX35 with an AT25 type
EEPROM and on i.MX27/i.MX31 with a Freescale MC13783 PMIC.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Tested-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: David Brownell <david-b@pacbell.net>
Cc: Andrea Paterniani <a.paterniani@swapp-eng.it>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-23 07:39:43 -07:00

28 lines
1.1 KiB
C

#ifndef __MACH_SPI_H_
#define __MACH_SPI_H_
/*
* struct spi_imx_master - device.platform_data for SPI controller devices.
* @chipselect: Array of chipselects for this master. Numbers >= 0 mean gpio
* pins, numbers < 0 mean internal CSPI chipselects according
* to MXC_SPI_CS(). Normally you want to use gpio based chip
* selects as the CSPI module tries to be intelligent about
* when to assert the chipselect: The CSPI module deasserts the
* chipselect once it runs out of input data. The other problem
* is that it is not possible to mix between high active and low
* active chipselects on one single bus using the internal
* chipselects. Unfortunately Freescale decided to put some
* chipselects on dedicated pins which are not usable as gpios,
* so we have to support the internal chipselects.
* @num_chipselect: ARRAY_SIZE(chipselect)
*/
struct spi_imx_master {
int *chipselect;
int num_chipselect;
};
#define MXC_SPI_CS(no) ((no) - 32)
#endif /* __MACH_SPI_H_*/