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| author | Codrin Ciubotariu <codrin.ciubotariu@microchip.com> | 2020-08-04 11:59:23 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2020-08-05 11:52:22 +0200 |
| commit | db36e827d8762eaa6aacd2c918a55ac487aa2501 (patch) | |
| tree | 497e3e41f2a307eab4f1156530e42e216ec322bb /Documentation/devicetree | |
| parent | i2c: rcar: avoid race when unregistering slave (diff) | |
| download | linux-db36e827d8762eaa6aacd2c918a55ac487aa2501.tar.xz linux-db36e827d8762eaa6aacd2c918a55ac487aa2501.zip | |
dt-bindings: i2c: add generic properties for GPIO bus recovery
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>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/i2c/i2c.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/i2c/i2c.txt b/Documentation/devicetree/bindings/i2c/i2c.txt index 438ae123107e..a21c359b9f02 100644 --- a/Documentation/devicetree/bindings/i2c/i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c.txt @@ -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. |