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 38 #endif 39