Commit 91e7edce authored by Zhiyong Tao's avatar Zhiyong Tao Committed by Linus Walleij
Browse files

dt-bindings: pinctrl: mt8195: change pull up/down description 



For supporting SI units in "bias-pull-down" & "bias-pull-up",
change pull up/down description
and add "mediatek,rsel_resistance_in_si_unit" description.

Signed-off-by: default avatarZhiyong Tao <zhiyong.tao@mediatek.com>
Link: https://lore.kernel.org/r/20210924080632.28410-3-zhiyong.tao@mediatek.com


Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 26564c44

Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml

+84 −2
Original line number Diff line number Diff line
@@ -49,6 +49,12 @@ properties: 
    description: The interrupt outputs to sysirq.

    maxItems: 1



  mediatek,rsel_resistance_in_si_unit:

    type: boolean

    description: |

      Identifying i2c pins pull up/down type which is RSEL. It can support

      RSEL define or si unit value(ohm) to set different resistance.



#PIN CONFIGURATION NODES

patternProperties:

  '-pins$':
@@ -82,9 +88,85 @@ patternProperties: 
      drive-strength:

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



      bias-pull-down: true

      bias-pull-down:

        description: |

          For pull down type is normal, it don't need add RSEL & R1R0 define

          and resistance value.

          For pull down type is PUPD/R0/R1 type, it can add R1R0 define to

          set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &

          "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" & "MTK_PUPD_SET_R1R0_11"

          define in mt8195.

          For pull down type is RSEL, it can add RSEL define & resistance value(ohm)

          to set different resistance by identifying property "mediatek,rsel_resistance_in_si_unit".

          It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001"

          & "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011" & "MTK_PULL_SET_RSEL_100"

          & "MTK_PULL_SET_RSEL_101" & "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111"

          define in mt8195. It can also support resistance value(ohm) "75000" & "5000" in mt8195.

          oneOf:

            - enum: [100, 101, 102, 103]

            - description: mt8195 pull down PUPD/R0/R1 type define value.

            - enum: [200, 201, 202, 203, 204, 205, 206, 207]

            - description: mt8195 pull down RSEL type define value.

            - enum: [75000, 5000]

            - description: mt8195 pull down RSEL type si unit value(ohm).



          An example of using RSEL define:

          pincontroller {

            i2c0_pin {

              pinmux = <PINMUX_GPIO8__FUNC_SDA0>;

              bias-pull-down = <MTK_PULL_SET_RSEL_001>;

            };

          };

          An example of using si unit resistance value(ohm):

          &pio {

            mediatek,rsel_resistance_in_si_unit;

          }

          pincontroller {

            i2c0_pin {

              pinmux = <PINMUX_GPIO8__FUNC_SDA0>;

              bias-pull-down = <75000>;

            };

          };



      bias-pull-up: true

      bias-pull-up:

        description: |

          For pull up type is normal, it don't need add RSEL & R1R0 define

          and resistance value.

          For pull up type is PUPD/R0/R1 type, it can add R1R0 define to

          set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &

          "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" & "MTK_PUPD_SET_R1R0_11"

          define in mt8195.

          For pull up type is RSEL, it can add RSEL define & resistance value(ohm)

          to set different resistance by identifying property "mediatek,rsel_resistance_in_si_unit".

          It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001"

          & "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011" & "MTK_PULL_SET_RSEL_100"

          & "MTK_PULL_SET_RSEL_101" & "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111"

          define in mt8195. It can also support resistance value(ohm)

          "1000" & "1500" & "2000" & "3000" & "4000" & "5000" & "10000" & "75000" in mt8195.

          oneOf:

            - enum: [100, 101, 102, 103]

            - description: mt8195 pull up PUPD/R0/R1 type define value.

            - enum: [200, 201, 202, 203, 204, 205, 206, 207]

            - description: mt8195 pull up RSEL type define value.

            - enum: [1000, 1500, 2000, 3000, 4000, 5000, 10000, 75000]

            - description: mt8195 pull up RSEL type si unit value(ohm).

          An example of using RSEL define:

          pincontroller {

            i2c0_pin {

              pinmux = <PINMUX_GPIO8__FUNC_SDA0>;

              bias-pull-up = <MTK_PULL_SET_RSEL_001>;

            };

          };

          An example of using si unit resistance value(ohm):

          &pio {

            mediatek,rsel_resistance_in_si_unit;

          }

          pincontroller {

            i2c0_pin {

              pinmux = <PINMUX_GPIO8__FUNC_SDA0>;

              bias-pull-up = <1000>;

            };

          };



      bias-disable: true