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b92e301633
Register values in NTXEC are big-endian on the I2C bus, but the regmap subsystem handles the conversion between CPU-endian and big-endian data internally. ntxec_reg8 should thus return u16, not __be16. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Signed-off-by: Lee Jones <lee.jones@linaro.org> Link: https://lore.kernel.org/r/20211218152553.744615-1-j.neuschaefer@gmx.net
38 lines
904 B
C
38 lines
904 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright 2020 Jonathan Neuschäfer
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*
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* Register access and version information for the Netronix embedded
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* controller.
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*/
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#ifndef NTXEC_H
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#define NTXEC_H
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#include <linux/types.h>
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struct device;
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struct regmap;
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struct ntxec {
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struct device *dev;
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struct regmap *regmap;
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};
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/*
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* Some registers, such as the battery status register (0x41), are in
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* big-endian, but others only have eight significant bits, which are in the
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* first byte transmitted over I2C (the MSB of the big-endian value).
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* This convenience function converts an 8-bit value to 16-bit for use in the
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* second kind of register.
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*/
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static inline u16 ntxec_reg8(u8 value)
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{
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return value << 8;
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}
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/* Known firmware versions */
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#define NTXEC_VERSION_KOBO_AURA 0xd726 /* found in Kobo Aura */
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#define NTXEC_VERSION_TOLINO_SHINE2 0xf110 /* found in Tolino Shine 2 HD */
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#endif
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