1 /* SPDX-License-Identifier: GPL-2.0
2  *
3  * tcan4x5x - Texas Instruments TCAN4x5x Family CAN controller driver
4  *
5  * Copyright (c) 2020 Pengutronix,
6  *                    Marc Kleine-Budde <kernel@pengutronix.de>
7  */
8 
9 #ifndef _TCAN4X5X_H
10 #define _TCAN4X5X_H
11 
12 #include <linux/gpio/consumer.h>
13 #include <linux/regmap.h>
14 #include <linux/regulator/consumer.h>
15 #include <linux/spi/spi.h>
16 
17 #include "m_can.h"
18 
19 #define TCAN4X5X_SANITIZE_SPI 1
20 
21 struct __packed tcan4x5x_buf_cmd {
22 	u8 cmd;
23 	__be16 addr;
24 	u8 len;
25 };
26 
27 struct tcan4x5x_map_buf {
28 	struct tcan4x5x_buf_cmd cmd;
29 	u8 data[256 * sizeof(u32)];
30 } ____cacheline_aligned;
31 
32 struct tcan4x5x_priv {
33 	struct m_can_classdev cdev;
34 
35 	struct regmap *regmap;
36 	struct spi_device *spi;
37 
38 	struct gpio_desc *reset_gpio;
39 	struct gpio_desc *device_wake_gpio;
40 	struct gpio_desc *device_state_gpio;
41 	struct regulator *power;
42 
43 	struct tcan4x5x_map_buf map_buf_rx;
44 	struct tcan4x5x_map_buf map_buf_tx;
45 };
46 
47 static inline void
tcan4x5x_spi_cmd_set_len(struct tcan4x5x_buf_cmd * cmd,u8 len)48 tcan4x5x_spi_cmd_set_len(struct tcan4x5x_buf_cmd *cmd, u8 len)
49 {
50 	/* number of u32 */
51 	cmd->len = len >> 2;
52 }
53 
54 int tcan4x5x_regmap_init(struct tcan4x5x_priv *priv);
55 
56 #endif
57