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Date: Fri, 24 Sep 2021 16:06:29 +0800
From: Zhiyong Tao <zhiyong.tao@...iatek.com>
To: <robh+dt@...nel.org>, <linus.walleij@...aro.org>,
<mark.rutland@....com>, <matthias.bgg@...il.com>,
<sean.wang@...nel.org>
CC: <srv_heupstream@...iatek.com>, <zhiyong.tao@...iatek.com>,
<hui.liu@...iatek.com>, <light.hsieh@...iatek.com>,
<biao.huang@...iatek.com>, <hongzhou.yang@...iatek.com>,
<sean.wang@...iatek.com>, <seiya.wang@...iatek.com>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>, <linux-gpio@...r.kernel.org>
Subject: [PATCH v14 2/5] 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: Zhiyong Tao <zhiyong.tao@...iatek.com>
---
.../bindings/pinctrl/pinctrl-mt8195.yaml | 86 ++++++++++++++++++-
1 file changed, 84 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
index 2f12ec59eee5..5f642bef72af 100644
--- a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
@@ -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$':
@@ -85,9 +91,85 @@ patternProperties:
2/4/6/8/10/12/14/16mA in mt8195.
enum: [0, 1, 2, 3, 4, 5, 6, 7]
- 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
--
2.25.1
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