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

Documentation/ABI/testing/sysfs-platform-i2c-demux-pinctrl

+12 −17
Original line number Original line Diff line number Diff line 
What:		/sys/devices/platform/<i2c-demux-name>/cur_master

What:		/sys/devices/platform/<i2c-demux-name>/available_masters

Date:		January 2016

Date:		January 2016

KernelVersion:	4.6

KernelVersion:	4.6

Contact:	Wolfram Sang <wsa@the-dreams.de>

Contact:	Wolfram Sang <wsa@the-dreams.de>

Description:

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

What:		/sys/devices/platform/<i2c-demux-name>/current_master

give you a list with the active master marked. Example from a Renesas Lager

Date:		January 2016

board:

KernelVersion:	4.6



Contact:	Wolfram Sang <wsa@the-dreams.de>

root@Lager:~# cat /sys/devices/platform/i2c@8/cur_master

Description:

* 0 - /i2c@9

		This file selects/shows the active I2C master for a demultiplexed

  1 - /i2c@e6520000

		bus. It uses the <index> value from the file 'available_masters'.
 
  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