ntxec.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright 2020 Jonathan Neuschäfer
 4 *
 5 * Register access and version information for the Netronix embedded
 6 * controller.
 7 */
 8
 9#ifndef NTXEC_H
10#define NTXEC_H
11
12#include <linux/types.h>
13
14struct device;
15struct regmap;
16
17struct ntxec {
18	struct device *dev;
19	struct regmap *regmap;
20};
21
22/*
23 * Some registers, such as the battery status register (0x41), are in
24 * big-endian, but others only have eight significant bits, which are in the
25 * first byte transmitted over I2C (the MSB of the big-endian value).
26 * This convenience function converts an 8-bit value to 16-bit for use in the
27 * second kind of register.
28 */
29static inline u16 ntxec_reg8(u8 value)
30{
31	return value << 8;
32}
33
34/* Known firmware versions */
35#define NTXEC_VERSION_KOBO_AURA	0xd726	/* found in Kobo Aura */
36#define NTXEC_VERSION_TOLINO_SHINE2 0xf110 /* found in Tolino Shine 2 HD */
37#define NTXEC_VERSION_TOLINO_VISION 0xe135 /* found in Tolino Vision, contains RTC, ADC, PWM, home pad */
38#endif