linux-kernel - [PATCH v10 1/7] [v10,1/7]: dt-bindings: soc: mediatek: add mtk svs dt-bindings

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Date:   Sun, 27 Dec 2020 18:54:43 +0800
From:   Roger Lu <roger.lu@...iatek.com>
To:     Matthias Brugger <matthias.bgg@...il.com>,
        Enric Balletbo Serra <eballetbo@...il.com>,
        Kevin Hilman <khilman@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Nicolas Boichat <drinkcat@...gle.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
CC:     Fan Chen <fan.chen@...iatek.com>,
        HenryC Chen <HenryC.Chen@...iatek.com>,
        YT Lee <yt.lee@...iatek.com>,
        Xiaoqing Liu <Xiaoqing.Liu@...iatek.com>,
        Charles Yang <Charles.Yang@...iatek.com>,
        Angus Lin <Angus.Lin@...iatek.com>,
        Mark Rutland <mark.rutland@....com>,
        Nishanth Menon <nm@...com>, Roger Lu <roger.lu@...iatek.com>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>
Subject: [PATCH v10 1/7] [v10,1/7]: dt-bindings: soc: mediatek: add mtk svs dt-bindings

Document the binding for enabling mtk svs on MediaTek SoC.

Signed-off-by: Roger Lu <roger.lu@...iatek.com>
---
 .../bindings/soc/mediatek/mtk-svs.yaml        | 75 +++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml

diff --git a/Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml b/Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml
new file mode 100644
index 000000000000..9c7da0acd82f
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml
@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/mediatek/mtk-svs.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Introduce MTK SVS engine
+
+maintainers:
+  - Matthias Brugger <matthias.bgg@...il.com>
+  - Kevin Hilman <khilman@...nel.org>
+  - Nishanth Menon <nm@...com>
+
+description: |+
+  The Smart Voltage Scaling(SVS) engine is a piece of hardware
+  which has several controllers(banks) for calculating suitable
+  voltage to different power domains(CPU/GPU/CCI) according to
+  chip process corner, temperatures and other factors. Then DVFS
+  driver could apply SVS bank voltage to PMIC/Buck.
+
+properties:
+  compatible:
+    enum:
+      - mediatek,mt8183-svs
+
+  reg:
+    description: Address range of the MTK SVS controller.
+    maxItems: 1
+
+  interrupts:
+    description: IRQ for the MTK SVS controller.
+    maxItems: 1
+
+  clocks:
+    description: Main clock for MTK SVS controller to work.
+
+  clock-names:
+    const: main
+
+  nvmem-cells:
+    maxItems: 2
+    description:
+      Phandle to the calibration data provided by a nvmem device.
+
+  nvmem-cell-names:
+    items:
+      - const: svs-calibration-data
+      - const: t-calibration-data
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - nvmem-cells
+  - nvmem-cell-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/mt8183-clk.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    svs: svs@...0b000 {
+        compatible = "mediatek,mt8183-svs";
+        reg = <0 0x1100b000 0 0x1000>;
+        interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW>;
+        clocks = <&infracfg CLK_INFRA_THERM>;
+        clock-names = "main";
+        nvmem-cells = <&svs_calibration>, <&thermal_calibration>;
+        nvmem-cell-names = "svs-calibration-data", "t-calibration-data";
+    };
-- 
2.18.0