| Sascha Hauer | b5f3294 | 2009-09-22 16:46:02 -0700 | [diff] [blame] | 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 | */ |
| 20 | struct 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_*/ |