Commit 4ac68333 authored by Nícolas F. R. A. Prado's avatar Nícolas F. R. A. Prado Committed by Linus Walleij
Browse files

dt-bindings: pinctrl: mt8192: Add mediatek,drive-strength-adv property 



Add the mediatek,drive-strength-adv property to the pinctrl-mt8192
dt-binding to allow further drive current adjustments for I2C nodes on
MT8192. It is the same as in mt8183-pinctrl.

Signed-off-by: default avatarNícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220315211936.442708-3-nfraprado@collabora.com


Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 1c5fdf0f

Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml

+26 −0
Original line number Diff line number Diff line
@@ -78,6 +78,32 @@ patternProperties: 
              dt-bindings/pinctrl/mt65xx.h. It can only support 2/4/6/8/10/12/14/16mA in mt8192.

            enum: [2, 4, 6, 8, 10, 12, 14, 16]



          mediatek,drive-strength-adv:

            description: |

              Describe the specific driving setup property.

              For I2C pins, the existing generic driving setup can only support

              2/4/6/8/10/12/14/16mA driving. But in specific driving setup, they

              can support 0.125/0.25/0.5/1mA adjustment. If we enable specific

              driving setup, the existing generic setup will be disabled.

              The specific driving setup is controlled by E1E0EN.

              When E1=0/E0=0, the strength is 0.125mA.

              When E1=0/E0=1, the strength is 0.25mA.

              When E1=1/E0=0, the strength is 0.5mA.

              When E1=1/E0=1, the strength is 1mA.

              EN is used to enable or disable the specific driving setup.

              Valid arguments are described as below:

              0: (E1, E0, EN) = (0, 0, 0)

              1: (E1, E0, EN) = (0, 0, 1)

              2: (E1, E0, EN) = (0, 1, 0)

              3: (E1, E0, EN) = (0, 1, 1)

              4: (E1, E0, EN) = (1, 0, 0)

              5: (E1, E0, EN) = (1, 0, 1)

              6: (E1, E0, EN) = (1, 1, 0)

              7: (E1, E0, EN) = (1, 1, 1)

              So the valid arguments are from 0 to 7.

            $ref: /schemas/types.yaml#/definitions/uint32

            enum: [0, 1, 2, 3, 4, 5, 6, 7]



          bias-pull-down: true



          bias-pull-up: true