Commit 39b132b0 authored by Wolfram Sang's avatar Wolfram Sang Committed by Wolfram Sang
Browse files

i2c: mux: demux-pinctrl: Update docs to new sysfs-attributes

Update the docs according to the recent code changes, too.

Fixes: c0c508a4

 ("i2c: mux: demux-pinctrl: Clean up sysfs attributes")
Signed-off-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent c0c508a4
What: /sys/devices/platform/<i2c-demux-name>/cur_master
What: /sys/devices/platform/<i2c-demux-name>/available_masters
Date: January 2016
KernelVersion: 4.6
Contact: Wolfram Sang <wsa@the-dreams.de>
Description:
Reading the file will give you a list of masters which can be
selected for a demultiplexed bus. The format is
"<index>:<name>". Example from a Renesas Lager board:
This file selects the active I2C master for a demultiplexed bus.
0:/i2c@e6500000 1:/i2c@e6508000
Write 0 there for the first master, 1 for the second etc. Reading the file will
give you a list with the active master marked. Example from a Renesas Lager
board:
root@Lager:~# cat /sys/devices/platform/i2c@8/cur_master
* 0 - /i2c@9
1 - /i2c@e6520000
2 - /i2c@e6530000
root@Lager:~# echo 2 > /sys/devices/platform/i2c@8/cur_master
root@Lager:~# cat /sys/devices/platform/i2c@8/cur_master
0 - /i2c@9
1 - /i2c@e6520000
* 2 - /i2c@e6530000
What: /sys/devices/platform/<i2c-demux-name>/current_master
Date: January 2016
KernelVersion: 4.6
Contact: Wolfram Sang <wsa@the-dreams.de>
Description:
This file selects/shows the active I2C master for a demultiplexed
bus. It uses the <index> value from the file 'available_masters'.
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment