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author | Herbert Xu <herbert@gondor.apana.org.au> | 2009-12-01 10:16:22 +0300 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-12-01 10:16:22 +0300 |
commit | 838632438145ac6863377eb12d8b8eef9c55d288 (patch) | |
tree | fbb0757df837f3c75a99c518a3596c38daef162d /arch/arm/plat-mxc | |
parent | 9996508b3353063f2d6c48c1a28a84543d72d70b (diff) | |
parent | 29e553631b2a0d4eebd23db630572e1027a9967a (diff) | |
download | linux-838632438145ac6863377eb12d8b8eef9c55d288.tar.xz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'arch/arm/plat-mxc')
-rw-r--r-- | arch/arm/plat-mxc/include/mach/spi.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/include/mach/spi.h b/arch/arm/plat-mxc/include/mach/spi.h new file mode 100644 index 000000000000..08be445e8eb8 --- /dev/null +++ b/arch/arm/plat-mxc/include/mach/spi.h @@ -0,0 +1,27 @@ + +#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_*/ |