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 | |
14 | struct device; |
15 | struct regmap; |
16 | |
17 | struct 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 | */ |
29 | static 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 |
39 | |