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

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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: c0c508a418f9da ("i2c: mux: demux-pinctrl: Clean up sysfs attributes") Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-04-03 14:42:16 +00:00
What: /sys/devices/platform/<i2c-demux-name>/available_masters
i2c: mux: demux-pinctrl: add driver This driver allows an I2C bus to switch between multiple masters. This is not hot-switching because connected I2C slaves will be re-instantiated. It is meant to select the best I2C core at runtime once the task is known. Example: Prefer i2c-gpio over another I2C core because of HW errata affecting your use case. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-01-13 14:29:27 +00:00
Date: January 2016
KernelVersion: 4.6
Contact: Wolfram Sang <wsa@the-dreams.de>
Description:
i2c: mux: demux-pinctrl: Update docs to new sysfs-attributes Update the docs according to the recent code changes, too. Fixes: c0c508a418f9da ("i2c: mux: demux-pinctrl: Clean up sysfs attributes") Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-04-03 14:42:16 +00:00
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:
i2c: mux: demux-pinctrl: add driver This driver allows an I2C bus to switch between multiple masters. This is not hot-switching because connected I2C slaves will be re-instantiated. It is meant to select the best I2C core at runtime once the task is known. Example: Prefer i2c-gpio over another I2C core because of HW errata affecting your use case. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-01-13 14:29:27 +00:00
i2c: mux: demux-pinctrl: Update docs to new sysfs-attributes Update the docs according to the recent code changes, too. Fixes: c0c508a418f9da ("i2c: mux: demux-pinctrl: Clean up sysfs attributes") Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-04-03 14:42:16 +00:00
0:/i2c@e6500000 1:/i2c@e6508000
i2c: mux: demux-pinctrl: add driver This driver allows an I2C bus to switch between multiple masters. This is not hot-switching because connected I2C slaves will be re-instantiated. It is meant to select the best I2C core at runtime once the task is known. Example: Prefer i2c-gpio over another I2C core because of HW errata affecting your use case. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-01-13 14:29:27 +00:00
i2c: mux: demux-pinctrl: Update docs to new sysfs-attributes Update the docs according to the recent code changes, too. Fixes: c0c508a418f9da ("i2c: mux: demux-pinctrl: Clean up sysfs attributes") Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-04-03 14:42:16 +00:00
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'.
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