| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright 2020 Jonathan Neuschäfer |
| * |
| * Register access and version information for the Netronix embedded |
| * controller. |
| */ |
| |
| #ifndef NTXEC_H |
| #define NTXEC_H |
| |
| #include <linux/types.h> |
| |
| struct device; |
| struct regmap; |
| |
| struct ntxec { |
| struct device *dev; |
| struct regmap *regmap; |
| }; |
| |
| /* |
| * Some registers, such as the battery status register (0x41), are in |
| * big-endian, but others only have eight significant bits, which are in the |
| * first byte transmitted over I2C (the MSB of the big-endian value). |
| * This convenience function converts an 8-bit value to 16-bit for use in the |
| * second kind of register. |
| */ |
| static inline __be16 ntxec_reg8(u8 value) |
| { |
| return value << 8; |
| } |
| |
| /* Known firmware versions */ |
| #define NTXEC_VERSION_KOBO_AURA 0xd726 /* found in Kobo Aura */ |
| #define NTXEC_VERSION_TOLINO_SHINE2 0xf110 /* found in Tolino Shine 2 HD */ |
| |
| #endif |
