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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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