linux-kernel - [PATCH v4 4/9] dt-bindings: mfd: mediatek: Add bindings for MT6357 PMIC

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Message-Id: <20221005-mt6357-support-v4-4-5d2bb58e6087@baylibre.com>
Date:   Tue, 08 Nov 2022 19:43:39 +0100
From:   Alexandre Mergnat <amergnat@...libre.com>
To:     Fabien Parent <fabien.parent@...aro.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Mark Brown <broonie@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Lee Jones <lee@...nel.org>,
        Chen Zhong <chen.zhong@...iatek.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     linux-leds@...r.kernel.org,
        Alexandre Mergnat <amergnat@...libre.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-input@...r.kernel.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Fabien Parent <fparent@...libre.com>,
        linux-rtc@...r.kernel.org, Rob Herring <robh@...nel.org>,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        Mattijs Korpershoek <mkorpershoek@...libre.com>
Subject: [PATCH v4 4/9] dt-bindings: mfd: mediatek: Add bindings for MT6357 PMIC

Currently, almost all MT63XX PMIC are documented mfd/mt6397.txt.
Unfortunately, the PMICs haven't always similar HW sub-features.
To have a better human readable schema, I chose to make one PMIC schema
to match the exact HW capabilities instead of convert mt6397.txt to
mediatek,mt63xx.yaml and put a bunch of properties behind
"if contain ... then ..."

- add interrupt property
- change property refs to match with new yaml documentation

Signed-off-by: Alexandre Mergnat <amergnat@...libre.com>
---
 .../devicetree/bindings/mfd/mediatek,mt6357.yaml   | 102 +++++++++++++++++++++
 1 file changed, 102 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/mediatek,mt6357.yaml b/Documentation/devicetree/bindings/mfd/mediatek,mt6357.yaml
new file mode 100644
index 000000000000..7b421f21d3f5
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/mediatek,mt6357.yaml
@@ -0,0 +1,102 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/mediatek,mt6357.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT6357 Multifunction Device Driver
+
+maintainers:
+  - Alexandre Mergnat <amergnat@...libre.com>
+
+description: |
+  MT6357 is a power management system chip containing 5 buck
+  converters and 29 LDOs. Supported features are audio codec,
+  USB battery charging, fuel gauge, RTC
+
+  This is a multifunction device with the following sub modules:
+  - Regulator
+  - RTC
+  - Keys
+
+  It is interfaced to host controller using SPI interface by a proprietary hardware
+  called PMIC wrapper or pwrap. This MFD is a child device of pwrap.
+  See the following for pwrap node definitions:
+  ../soc/mediatek/mediatek,pwrap.yaml
+
+properties:
+  compatible:
+    const: mediatek,mt6357
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  "#interrupt-cells":
+    const: 2
+
+  regulators:
+    type: object
+    $ref: ../regulator/mediatek,mt6357-regulator.yaml
+    description:
+      Child node that specify the regulator.
+
+  rtc:
+    type: object
+    $ref: ../rtc/mediatek,mt6397-rtc.yaml
+    description:
+      Child node that specify the RTC.
+
+  keys:
+    type: object
+    $ref: ../input/mediatek,pmic-keys.yaml
+    description:
+      Child node that specify the keys.
+
+required:
+  - compatible
+  - regulators
+
+additionalProperties: false
+
+examples:
+  - |
+    pwrap {
+        pmic {
+            compatible = "mediatek,mt6357";
+
+            interrupt-parent = <&pio>;
+            interrupts = <145 IRQ_TYPE_LEVEL_HIGH>;
+            interrupt-controller;
+            #interrupt-cells = <2>;
+
+            regulators {
+                mt6357_vproc_reg: buck-vproc {
+                    regulator-name = "vproc";
+                    regulator-min-microvolt = <518750>;
+                    regulator-max-microvolt = <1312500>;
+                    regulator-ramp-delay = <6250>;
+                    regulator-enable-ramp-delay = <220>;
+                    regulator-always-on;
+                };
+
+                // ...
+
+                mt6357_vusb33_reg: ldo-vusb33 {
+                    regulator-name = "vusb33";
+                    regulator-min-microvolt = <3000000>;
+                    regulator-max-microvolt = <3100000>;
+                    regulator-enable-ramp-delay = <264>;
+                };
+            };
+
+            rtc {
+                compatible = "mediatek,mt6357-rtc";
+            };
+
+            keys {
+                compatible = "mediatek,mt6357-keys";
+            };
+        };
+    };

-- 
b4 0.10.1