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Date: Sun, 22 Nov 2020 23:27:34 +0100
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>,
Arnd Bergmann <arnd@...db.de>, Daniel Palmer <daniel@...f.com>,
Andy Shevchenko <andy.shevchenko@...il.com>,
Rob Herring <robh@...nel.org>
Subject: [PATCH v4 2/7] dt-bindings: mfd: Add binding for Netronix 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>
Reviewed-by: Rob Herring <robh@...nel.org>
---
v4:
- Add R-b tag
v3:
- https://lore.kernel.org/lkml/20200924192455.2484005-3-j.neuschaefer@gmx.net/
- Remove binding in text form patch description again
- Add additionalProperties: false
- Remove interrupt-controller property from example
- Merge pwm/rtc nodes into main node
v2:
- https://lore.kernel.org/lkml/20200905133230.1014581-3-j.neuschaefer@gmx.net/
- Add the plaintext DT binding for comparison
---
.../bindings/mfd/netronix,ntxec.yaml | 76 +++++++++++++++++++
1 file changed, 76 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..59a630025f52f
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml
@@ -0,0 +1,76 @@
+# 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
+
+ "#pwm-cells":
+ const: 2
+ description: |
+ Number of cells in a PWM specifier.
+
+ The following PWM channels are supported:
+ - 0: The PWM channel controlled by registers 0xa1-0xa7
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+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>;
+ #pwm-cells = <2>;
+ };
+ };
+
+ backlight {
+ compatible = "pwm-backlight";
+ pwms = <&ec 0 50000>;
+ power-supply = <&backlight_regulator>;
+ };
+
+ backlight_regulator: regulator-dummy {
+ compatible = "regulator-fixed";
+ regulator-name = "backlight";
+ };
--
2.29.2
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