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 */
51
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