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