From: Sam Hansen <hansens@google.com>
To: linux-i2c@vger.kernel.org
Cc: Sam Hansen <hansens@google.com>,
wsa@the-dreams.de, corbet@lwn.net, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v3 1/3] Documentation/i2c: whitespace cleanup
Date: Fri, 13 Apr 2018 10:42:55 -0700 [thread overview]
Message-ID: <20180413174257.139182-1-hansens@google.com> (raw)
This strips trailing whitespace in Documentation/i2c/dev-interface.
Signed-off-by: Sam Hansen <hansens@google.com>
---
No changes from v2.
Documentation/i2c/dev-interface | 12 ++++++------
1 file 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
--
2.17.0.484.g0c8726318c-goog
next reply other threads:[~2018-04-13 17:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-13 17:42 Sam Hansen [this message]
2018-04-13 17:42 ` [PATCH v3 2/3] Documentation/i2c: sync docs with current state of i2c-tools Sam Hansen
2018-04-18 8:09 ` Wolfram Sang
2018-04-18 8:21 ` Wolfram Sang
2018-04-18 18:17 ` Sam Hansen
2018-04-13 17:42 ` [PATCH v3 3/3] Documentation/i2c: adopt kernel commenting style in examples Sam Hansen
2018-04-18 8:10 ` Wolfram Sang
2018-04-18 8:08 ` [PATCH v3 1/3] Documentation/i2c: whitespace cleanup Wolfram Sang
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