xref: /openbmc/u-boot/include/w1.h (revision 0fb667ae19f3dca8840b5906320fc60009a895b2)
1 /* SPDX-License-Identifier:	GPL-2.0+
2  *
3  * Copyright (c) 2015 Free Electrons
4  * Copyright (c) 2015 NextThing Co
5  *
6  */
7 
8 #ifndef __W1_H
9 #define __W1_H
10 
11 #include <dm.h>
12 
13 #define W1_FAMILY_DS24B33	0x23
14 #define W1_FAMILY_DS2431	0x2d
15 
16 struct w1_device {
17 	u64	id;
18 };
19 
20 struct w1_ops {
21 	u8	(*read_byte)(struct udevice *dev);
22 	bool	(*reset)(struct udevice *dev);
23 	u8	(*triplet)(struct udevice *dev, bool bdir);
24 	void	(*write_byte)(struct udevice *dev, u8 byte);
25 };
26 
27 int w1_get_bus(int busnum, struct udevice **busp);
28 u8 w1_get_device_family(struct udevice *dev);
29 
30 int w1_read_buf(struct udevice *dev, u8 *buf, unsigned int count);
31 int w1_read_byte(struct udevice *dev);
32 int w1_reset_select(struct udevice *dev);
33 int w1_write_buf(struct udevice *dev, u8 *buf, unsigned int count);
34 int w1_write_byte(struct udevice *dev, u8 byte);
35 
36 #endif
37