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| author | Sam Hansen | 2018-04-13 19:42:55 +0200 | 
|---|---|---|
| committer | Wolfram Sang | 2018-04-18 10:07:59 +0200 | 
| commit | 675edea10badf5b3446275d60e1bd2105905d498 (patch) | |
| tree | 075664a4098488b313eaf096ff0957f08e811f50 /Documentation/i2c/dev-interface | |
| parent | i2c: Remove depends on HAS_DMA in case of platform dependency (diff) | |
| download | kernel-qcow2-linux-675edea10badf5b3446275d60e1bd2105905d498.tar.gz kernel-qcow2-linux-675edea10badf5b3446275d60e1bd2105905d498.tar.xz kernel-qcow2-linux-675edea10badf5b3446275d60e1bd2105905d498.zip | |
Documentation/i2c: whitespace cleanup
This strips trailing whitespace in Documentation/i2c/dev-interface.
Signed-off-by: Sam Hansen <hansens@google.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'Documentation/i2c/dev-interface')
| -rw-r--r-- | Documentation/i2c/dev-interface | 12 | 
1 files changed, 6 insertions, 6 deletions
| diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index d04e6e4964ee..c8737d502791 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -9,8 +9,8 @@ i2c adapters present on your system at a given time. i2cdetect is part of  the i2c-tools package.  I2C device files are character device files with major device number 89 -and a minor device number corresponding to the number assigned as  -explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ...,  +and a minor device number corresponding to the number assigned as +explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ...,  i2c-10, ...). All 256 minor device numbers are reserved for i2c. @@ -38,7 +38,7 @@ Next thing, open the device file, as follows:    int file;    int adapter_nr = 2; /* probably dynamically determined */    char filename[20]; -   +    snprintf(filename, 19, "/dev/i2c-%d", adapter_nr);    file = open(filename, O_RDWR);    if (file < 0) { @@ -72,7 +72,7 @@ the device supports them. Both are illustrated below.      /* res contains the read word */    } -  /* Using I2C Write, equivalent of  +  /* Using I2C Write, equivalent of       i2c_smbus_write_word_data(file, reg, 0x6543) */    buf[0] = reg;    buf[1] = 0x43; @@ -147,7 +147,7 @@ You can do plain i2c transactions by using read(2) and write(2) calls.  You do not need to pass the address byte; instead, set it through  ioctl I2C_SLAVE before you try to access the device. -You can do SMBus level transactions (see documentation file smbus-protocol  +You can do SMBus level transactions (see documentation file smbus-protocol  for details) through the following functions:    __s32 i2c_smbus_write_quick(int file, __u8 value);    __s32 i2c_smbus_read_byte(int file); @@ -158,7 +158,7 @@ for details) through the following functions:    __s32 i2c_smbus_write_word_data(int file, __u8 command, __u16 value);    __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value);    __s32 i2c_smbus_read_block_data(int file, __u8 command, __u8 *values); -  __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length,  +  __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length,                                     __u8 *values);  All these transactions return -1 on failure; you can read errno to see  what happened. The 'write' transactions return 0 on success; the | 
