83 lines
2.6 KiB
C
Executable File
83 lines
2.6 KiB
C
Executable File
/*
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* Copyright (c) 2022 rockchip
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*
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*/
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#ifndef _SYSFS_H_
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#define _SYSFS_H_
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/**
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* write_sysfs_int() - write an integer value to a sysfs file
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* @filename: name of the file to write to
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* @basedir: the sysfs directory in which the file is to be found
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* @val: integer value to write to file
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*
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* Returns a value >= 0 on success, otherwise a negative error code.
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**/
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int write_sysfs_int(const char *filename, const char *basedir, int val);
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/**
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* write_sysfs_int_and_verify() - write an integer value to a sysfs file
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* and verify
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* @filename: name of the file to write to
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* @basedir: the sysfs directory in which the file is to be found
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* @val: integer value to write to file
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*
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* Returns a value >= 0 on success, otherwise a negative error code.
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**/
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int write_sysfs_int_and_verify(const char *filename, const char *basedir,
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int val);
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/**
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* write_sysfs_string_and_verify() - string write, readback and verify
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* @filename: name of file to write to
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* @basedir: the sysfs directory in which the file is to be found
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* @val: the string to write
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*
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* Returns a value >= 0 on success, otherwise a negative error code.
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**/
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int write_sysfs_string_and_verify(const char *filename, const char *basedir,
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const char *val);
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/**
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* write_sysfs_string() - write string to a sysfs file
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* @filename: name of file to write to
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* @basedir: the sysfs directory in which the file is to be found
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* @val: the string to write
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*
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* Returns a value >= 0 on success, otherwise a negative error code.
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**/
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int write_sysfs_string(const char *filename, const char *basedir,
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const char *val);
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/**
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* read_sysfs_posint() - read an integer value from file
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* @filename: name of file to read from
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* @basedir: the sysfs directory in which the file is to be found
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*
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* Returns the read integer value >= 0 on success, otherwise a negative error
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* code.
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**/
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int read_sysfs_posint(const char *filename, const char *basedir);
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/**
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* read_sysfs_float() - read a float value from file
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* @filename: name of file to read from
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* @basedir: the sysfs directory in which the file is to be found
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* @val: output the read float value
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*
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* Returns a value >= 0 on success, otherwise a negative error code.
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**/
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int read_sysfs_float(const char *filename, const char *basedir, float *val);
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/**
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* read_sysfs_string() - read a string from file
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* @filename: name of file to read from
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* @basedir: the sysfs directory in which the file is to be found
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* @str: output the read string
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*
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* Returns a value >= 0 on success, otherwise a negative error code.
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**/
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int read_sysfs_string(const char *filename, const char *basedir, char *str);
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#endif
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