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Date: Mon, 29 Mar 2021 16:06:06 +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>, <eddie.huang@...iatek.com>,
<jg_poxu@...iatek.com>, <biao.huang@...iatek.com>,
<hongzhou.yang@...iatek.com>, <erin.lo@...iatek.com>,
<sean.wang@...iatek.com>, <seiya.wang@...iatek.com>,
<sj.huang@...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 2/6] dt-bindings: pinctrl: mt8195: add binding document
The commit adds mt8195 compatible node in binding document.
Signed-off-by: Zhiyong Tao <zhiyong.tao@...iatek.com>
---
.../bindings/pinctrl/pinctrl-mt8195.yaml | 152 ++++++++++++++++++
1 file changed, 152 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
new file mode 100644
index 000000000000..7915b9568c29
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
@@ -0,0 +1,152 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/pinctrl-mt8195.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek MT8195 Pin Controller
+
+maintainers:
+ - Sean Wang <sean.wang@...iatek.com>
+
+description: |
+ The Mediatek's Pin controller is used to control SoC pins.
+
+properties:
+ compatible:
+ const: mediatek,mt8195-pinctrl
+
+ gpio-controller: true
+
+ '#gpio-cells':
+ description: |
+ Number of cells in GPIO specifier. Since the generic GPIO binding is used,
+ the amount of cells must be specified as 2. See the below
+ mentioned gpio binding representation for description of particular cells.
+ const: 2
+
+ gpio-ranges:
+ description: gpio valid number range.
+ maxItems: 1
+
+ reg:
+ description: |
+ Physical address base for gpio base registers. There are 8 GPIO
+ physical address base in mt8195.
+ maxItems: 8
+
+ reg-names:
+ description: |
+ Gpio base register names.
+ maxItems: 8
+
+ interrupt-controller: true
+
+ '#interrupt-cells':
+ const: 2
+
+ interrupts:
+ description: The interrupt outputs to sysirq.
+ maxItems: 1
+
+#PIN CONFIGURATION NODES
+patternProperties:
+ '^pins':
+ type: object
+ description: |
+ A pinctrl node should contain at least one subnodes representing the
+ pinctrl groups available on the machine. Each subnode will list the
+ pins it needs, and how they should be configured, with regard to muxer
+ configuration, pullups, drive strength, input enable/disable and
+ input schmitt.
+ An example of using macro:
+ pincontroller {
+ /* GPIO0 set as multifunction GPIO0 */
+ state_0_node_a {
+ pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
+ };
+ /* GPIO1 set as multifunction CLKM1 */
+ state_0_node_b {
+ pinmux = <PINMUX_GPIO1__FUNC_CLKM1>;
+ };
+ };
+ $ref: "pinmux-node.yaml"
+
+ properties:
+ pinmux:
+ description: |
+ Integer array, represents gpio pin number and mux setting.
+ Supported pin number and mux varies for different SoCs, and are defined
+ as macros in dt-bindings/pinctrl/<soc>-pinfunc.h directly.
+
+ drive-strength:
+ description: |
+ It can support some arguments, such as MTK_DRIVE_4mA, MTK_DRIVE_6mA, etc. See
+ dt-bindings/pinctrl/mt65xx.h. It can only support 2/4/6/8/10/12/14/16mA in mt8195.
+ enum: [2, 4, 6, 8, 10, 12, 14, 16]
+
+ bias-pull-down: true
+
+ bias-pull-up: true
+
+ bias-disable: true
+
+ output-high: true
+
+ output-low: true
+
+ input-enable: true
+
+ input-disable: true
+
+ input-schmitt-enable: true
+
+ input-schmitt-disable: true
+
+ required:
+ - pinmux
+
+ additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - interrupt-controller
+ - '#interrupt-cells'
+ - gpio-controller
+ - '#gpio-cells'
+ - gpio-ranges
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/pinctrl/mt8195-pinfunc.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ pio: pinctrl@...05000 {
+ compatible = "mediatek,mt8195-pinctrl";
+ reg = <0x10005000 0x1000>,
+ <0x11d10000 0x1000>,
+ <0x11d30000 0x1000>,
+ <0x11d40000 0x1000>,
+ <0x11e20000 0x1000>,
+ <0x11e20000 0x1000>,
+ <0x11eb0000 0x1000>,
+ <0x11f40000 0x1000>,
+ <0x1000b000 0x1000>;
+ reg-names = "iocfg0", "iocfg_bm", "iocfg_bl",
+ "iocfg_br", "iocfg_lm", "iocfg_rb",
+ "iocfg_tl", "eint";
+ gpio-controller;
+ #gpio-cells = <2>;
+ gpio-ranges = <&pio 0 0 144>;
+ interrupt-controller;
+ interrupts = <GIC_SPI 225 IRQ_TYPE_LEVEL_HIGH 0>;
+ #interrupt-cells = <2>;
+
+ pins {
+ pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
+ output-low;
+ };
+ };
--
2.18.0
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