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/* SPDX-License-Identifier: GPL-2.0 */
#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 or NULL. Numbers >= 0
* mean GPIO pins, -ENOENT means internal CSPI chipselect
* matching the position in the array. E.g., if chipselect[1] =
* -ENOENT then a SPI slave using chip select 1 will use the
* native SS1 line of the CSPI. Omitting the array will use
* all native chip selects.
* 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, on some SoCs, 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: If @chipselect is specified, ARRAY_SIZE(chipselect),
* otherwise the number of native chip selects.
*/
struct spi_imx_master {
int *chipselect;
int num_chipselect;
};
#endif /* __MACH_SPI_H_*/
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