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dt-bindings: i2c: add generic properties for GPIO bus recovery

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The I2C GPIO bus recovery properties consist of two GPIOS and one extra
pinctrl state ("gpio" or "recovery"). "recovery" pinctrl state is
considered deprecated and "gpio" should be used instead.
Not all are mandatory for recovery.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Reviewed-by: Rob Herring <robh@kernel.org>
[wsa: kept sorting, minor whitespace change]
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Codrin Ciubotariu 2020-08-04 12:59:23 +03:00 committed by Wolfram Sang
parent c7c9e914f9
commit db36e827d8
1 changed files with 10 additions and 0 deletions
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10
Documentation/devicetree/bindings/i2c/i2c.txt
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@ -72,6 +72,16 @@ wants to support one of the below features, it should adapt these bindings.
this information to adapt power management to keep the arbitration awake
all the time, for example. Can not be combined with 'single-master'.
- pinctrl
add extra pinctrl to configure SCL/SDA pins to GPIO function for bus
recovery, call it "gpio" or "recovery" (deprecated) state
- scl-gpios
specify the gpio related to SCL pin. Used for GPIO bus recovery.
- sda-gpios
specify the gpio related to SDA pin. Optional for GPIO bus recovery.
- single-master
states that there is no other master active on this bus. The OS can use
this information to detect a stalled bus more reliably, for example.