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 | |