linux-kernel - [RFC PATCH 03/10] dt-bindings: mfd: Add binding for Netronix's embedded controller

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Message-Id: <20200620224222.1312520-2-j.neuschaefer@gmx.net>
Date:   Sun, 21 Jun 2020 00:42:14 +0200
From:   Jonathan Neuschäfer <j.neuschaefer@....net>
To:     linux-kernel@...r.kernel.org
Cc:     Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Jonathan Neuschäfer <j.neuschaefer@....net>,
        Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Sam Ravnborg <sam@...nborg.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Heiko Stuebner <heiko.stuebner@...obroma-systems.com>,
        Stephan Gerhold <stephan@...hold.net>,
        Lubomir Rintel <lkundrak@...sk>,
        Mark Brown <broonie@...nel.org>, allen <allen.chen@....com.tw>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        devicetree@...r.kernel.org, linux-pwm@...r.kernel.org,
        linux-rtc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Heiko Stuebner <heiko@...ech.de>,
        Josua Mayer <josua.mayer@....eu>,
        Andreas Kemnade <andreas@...nade.info>
Subject: [RFC PATCH 03/10] dt-bindings: mfd: Add binding for Netronix's embedded controller

This EC is found in e-book readers of multiple brands (e.g. Kobo,
Tolino), and is typically implemented as a TI MSP430 microcontroller.

It controls different functions of the system, such as power on/off,
RTC, PWM for the backlight. The exact functionality provided can vary
between boards.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@....net>
---
 .../bindings/mfd/netronix,ntxec.yaml          | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml

diff --git a/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml b/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml
new file mode 100644
index 0000000000000..596df460f98eb
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/netronix,ntxec.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Netronix Embedded Controller
+
+maintainers:
+  - Jonathan Neuschäfer <j.neuschaefer@....net>
+
+description: |
+  This EC is found in e-book readers of multiple brands (e.g. Kobo, Tolino), and
+  is typically implemented as a TI MSP430 microcontroller.
+
+
+properties:
+  compatible:
+    const: netronix,ntxec
+
+  reg:
+    items:
+      - description: The I2C address of the EC
+
+  system-power-controller:
+    type: boolean
+    description: See Documentation/devicetree/bindings/power/power-controller.txt
+
+  interrupts:
+    minItems: 1
+    description:
+      The EC can signal interrupts via a GPIO line
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            ec: embedded-controller@43 {
+                    pinctrl-names = "default";
+                    pinctrl-0 = <&pinctrl_ntxec>;
+
+                    compatible = "netronix,ntxec";
+                    reg = <0x43>;
+                    system-power-controller;
+                    interrupt-parent = <&gpio4>;
+                    interrupts = <11 IRQ_TYPE_EDGE_FALLING>;
+                    interrupt-controller;
+                    #interrupt-cells = <1>;
+            };
+    };
--
2.27.0