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