1 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_*/ 28