blob: 08be445e8eb89ffd612aa0cb777d1c1fe90fba97 [file] [log] [blame]
Sascha Hauerb5f32942009-09-22 16:46:02 -07001
2#ifndef __MACH_SPI_H_
3#define __MACH_SPI_H_
4
5/*
6 * struct spi_imx_master - device.platform_data for SPI controller devices.
7 * @chipselect: Array of chipselects for this master. Numbers >= 0 mean gpio
8 * pins, numbers < 0 mean internal CSPI chipselects according
9 * to MXC_SPI_CS(). Normally you want to use gpio based chip
10 * selects as the CSPI module tries to be intelligent about
11 * when to assert the chipselect: The CSPI module deasserts the
12 * chipselect once it runs out of input data. The other problem
13 * is that it is not possible to mix between high active and low
14 * active chipselects on one single bus using the internal
15 * chipselects. Unfortunately Freescale decided to put some
16 * chipselects on dedicated pins which are not usable as gpios,
17 * so we have to support the internal chipselects.
18 * @num_chipselect: ARRAY_SIZE(chipselect)
19 */
20struct spi_imx_master {
21 int *chipselect;
22 int num_chipselect;
23};
24
25#define MXC_SPI_CS(no) ((no) - 32)
26
27#endif /* __MACH_SPI_H_*/