| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * Copyright 2020 Jonathan Neuschäfer |
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| 4 | * |
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| 5 | * Register access and version information for the Netronix embedded |
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| 6 | * controller. |
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| 7 | */ |
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| 8 | |
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| 9 | #ifndef NTXEC_H |
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| 10 | #define NTXEC_H |
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| 11 | |
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| 12 | #include <linux/types.h> |
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| 13 | |
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| 14 | struct device; |
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| 15 | struct regmap; |
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| 16 | |
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| 17 | struct ntxec { |
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| 18 | struct device *dev; |
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| 19 | struct regmap *regmap; |
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| 20 | }; |
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| 21 | |
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| 22 | /* |
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| 23 | * Some registers, such as the battery status register (0x41), are in |
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| 24 | * big-endian, but others only have eight significant bits, which are in the |
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| 25 | * first byte transmitted over I2C (the MSB of the big-endian value). |
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| 26 | * This convenience function converts an 8-bit value to 16-bit for use in the |
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| 27 | * second kind of register. |
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| 28 | */ |
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| 29 | static inline u16 ntxec_reg8(u8 value) |
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| 30 | { |
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| 31 | return value << 8; |
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| 32 | } |
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| 33 | |
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| 34 | /* Known firmware versions */ |
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| 35 | #define NTXEC_VERSION_KOBO_AURA 0xd726 /* found in Kobo Aura */ |
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| 36 | #define NTXEC_VERSION_TOLINO_SHINE2 0xf110 /* found in Tolino Shine 2 HD */ |
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| 37 | #define NTXEC_VERSION_TOLINO_VISION 0xe135 /* found in Tolino Vision, contains RTC, ADC, PWM, home pad */ |
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| 38 | #endif |
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| 39 | |
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