24 lines
666 B
Plaintext
24 lines
666 B
Plaintext
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What: /sys/devices/platform/<i2c-demux-name>/cur_master
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Date: January 2016
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KernelVersion: 4.6
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Contact: Wolfram Sang <wsa@the-dreams.de>
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Description:
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This file selects the active I2C master for a demultiplexed bus.
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Write 0 there for the first master, 1 for the second etc. Reading the file will
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give you a list with the active master marked. Example from a Renesas Lager
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board:
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root@Lager:~# cat /sys/devices/platform/i2c@8/cur_master
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* 0 - /i2c@9
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1 - /i2c@e6520000
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2 - /i2c@e6530000
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root@Lager:~# echo 2 > /sys/devices/platform/i2c@8/cur_master
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root@Lager:~# cat /sys/devices/platform/i2c@8/cur_master
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0 - /i2c@9
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1 - /i2c@e6520000
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* 2 - /i2c@e6530000
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