include/linux/spi/altera.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Header File for Altera SPI Driver.
   4  */
   5 #ifndef __LINUX_SPI_ALTERA_H
   6 #define __LINUX_SPI_ALTERA_H
   7
   8 #include <linux/interrupt.h>
   9 #include <linux/regmap.h>
  10 #include <linux/spi/spi.h>
  11 #include <linux/types.h>
  12
  13 #define ALTERA_SPI_MAX_CS               32
  14
  15 /**
  16  * struct altera_spi_platform_data - Platform data of the Altera SPI driver
  17  * @mode_bits:          Mode bits of SPI host.
  18  * @num_chipselect:     Number of chipselects.
  19  * @bits_per_word_mask: bitmask of supported bits_per_word for transfers.
  20  * @num_devices:        Number of devices that shall be added when the driver
  21  *                      is probed.
  22  * @devices:            The devices to add.
  23  */
  24 struct altera_spi_platform_data {
  25         u16                             mode_bits;
  26         u16                             num_chipselect;
  27         u32                             bits_per_word_mask;
  28         u16                             num_devices;
  29         struct spi_board_info           *devices;
  30 };
  31
  32 struct altera_spi {
  33         int irq;
  34         int len;
  35         int count;
  36         int bytes_per_word;
  37         u32 imr;
  38
  39         /* data buffers */
  40         const unsigned char *tx;
  41         unsigned char *rx;
  42
  43         struct regmap *regmap;
  44         u32 regoff;
  45         struct device *dev;
  46 };
  47
  48 extern irqreturn_t altera_spi_irq(int irq, void *dev);
  49 extern void altera_spi_init_host(struct spi_controller *host);
  50 #endif /* __LINUX_SPI_ALTERA_H */