From: "Jonathan Neuschäfer" <j.neuschaefer@gmx.net>
To: linux-kernel@vger.kernel.org
Cc: "Lee Jones" <lee.jones@linaro.org>,
"Rob Herring" <robh+dt@kernel.org>,
"Jonathan Neuschäfer" <j.neuschaefer@gmx.net>,
"Thierry Reding" <thierry.reding@gmail.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Alessandro Zummo" <a.zummo@towertech.it>,
"Alexandre Belloni" <alexandre.belloni@bootlin.com>,
"Shawn Guo" <shawnguo@kernel.org>,
"Sascha Hauer" <s.hauer@pengutronix.de>,
"Pengutronix Kernel Team" <kernel@pengutronix.de>,
"Fabio Estevam" <festevam@gmail.com>,
"NXP Linux Team" <linux-imx@nxp.com>,
"Sam Ravnborg" <sam@ravnborg.org>,
"Linus Walleij" <linus.walleij@linaro.org>,
"Heiko Stuebner" <heiko.stuebner@theobroma-systems.com>,
"Stephan Gerhold" <stephan@gerhold.net>,
"Lubomir Rintel" <lkundrak@v3.sk>,
"Mark Brown" <broonie@kernel.org>, allen <allen.chen@ite.com.tw>,
"Mauro Carvalho Chehab" <mchehab+huawei@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
devicetree@vger.kernel.org, linux-pwm@vger.kernel.org,
linux-rtc@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
"Heiko Stuebner" <heiko@sntech.de>,
"Josua Mayer" <josua.mayer@jm0.eu>,
"Andreas Kemnade" <andreas@kemnade.info>,
"Arnd Bergmann" <arnd@arndb.de>,
"Daniel Palmer" <daniel@0x0f.com>
Subject: [PATCH v2 04/10] dt-bindings: pwm: Add bindings for PWM function in Netronix EC
Date: Sat, 5 Sep 2020 15:32:24 +0200 [thread overview]
Message-ID: <20200905133230.1014581-5-j.neuschaefer@gmx.net> (raw)
In-Reply-To: <20200905133230.1014581-1-j.neuschaefer@gmx.net>
The Netronix embedded controller as found in Kobo Aura and Tolino Shine
supports one PWM channel, which is used to control the frontlight
brightness on these devices.
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
---
v2:
- Add plaintext binding to patch description, for comparison
- Fix pwm-cells property (should be 2, not 1)
- Add dummy regulator to example, because the pwm-backlight binding requires a
power supply
For reference, here is the binding in text form:
PWM functionality in Netronix Embedded Controller
Required properties:
- compatible: should be "netronix,ntxec-pwm"
- #pwm-cells: should be 2.
Available PWM channels:
- 0: The PWM channel controlled by registers 0xa1-0xa7
Example:
embedded-controller@43 {
compatible = "netronix,ntxec";
...
ec_pwm: pwm {
compatible = "netronix,ntxec-pwm";
#pwm-cells = <1>;
};
};
...
backlight {
compatible = "pwm-backlight";
pwms = <&ec_pwm 0 50000>;
};
---
.../bindings/mfd/netronix,ntxec.yaml | 19 +++++++++++
.../bindings/pwm/netronix,ntxec-pwm.yaml | 33 +++++++++++++++++++
2 files changed, 52 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pwm/netronix,ntxec-pwm.yaml
diff --git a/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml b/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml
index 596df460f98eb..73c873dda3e70 100644
--- a/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml
+++ b/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml
@@ -31,6 +31,9 @@ properties:
description:
The EC can signal interrupts via a GPIO line
+ pwm:
+ $ref: ../pwm/netronix,ntxec-pwm.yaml
+
required:
- compatible
- reg
@@ -53,5 +56,21 @@ examples:
interrupts = <11 IRQ_TYPE_EDGE_FALLING>;
interrupt-controller;
#interrupt-cells = <1>;
+
+ ec_pwm: pwm {
+ compatible = "netronix,ntxec-pwm";
+ #pwm-cells = <2>;
+ };
};
};
+
+ backlight {
+ compatible = "pwm-backlight";
+ pwms = <&ec_pwm 0 50000>;
+ power-supply = <&backlight_regulator>;
+ };
+
+ backlight_regulator: regulator-dummy {
+ compatible = "regulator-fixed";
+ regulator-name = "backlight";
+ };
diff --git a/Documentation/devicetree/bindings/pwm/netronix,ntxec-pwm.yaml b/Documentation/devicetree/bindings/pwm/netronix,ntxec-pwm.yaml
new file mode 100644
index 0000000000000..0c9d2801b8de1
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/netronix,ntxec-pwm.yaml
@@ -0,0 +1,33 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/netronix,ntxec-pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: PWM functionality in Netronix embedded controller
+
+maintainers:
+ - Jonathan Neuschäfer <j.neuschaefer@gmx.net>
+
+description: |
+ See also Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml
+
+ The Netronix EC contains PWM functionality, which is usually used to drive
+ the backlight LED.
+
+ The following PWM channels are supported:
+ - 0: The PWM channel controlled by registers 0xa1-0xa7
+
+allOf:
+ - $ref: pwm.yaml#
+
+properties:
+ compatible:
+ const: netronix,ntxec-pwm
+
+ "#pwm-cells":
+ const: 2
+
+required:
+ - compatible
+ - "#pwm-cells"
--
2.28.0
next prev parent reply other threads:[~2020-09-05 13:49 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-05 13:32 [PATCH v2 00/10] Netronix embedded controller driver for Kobo and Tolino ebook readers Jonathan Neuschäfer
2020-09-05 13:32 ` [PATCH v2 01/10] dt-bindings: Add vendor prefix for Netronix, Inc Jonathan Neuschäfer
2020-09-15 0:43 ` Rob Herring
2020-09-05 13:32 ` [PATCH v2 02/10] dt-bindings: mfd: Add binding for Netronix's embedded controller Jonathan Neuschäfer
2020-09-15 0:50 ` Rob Herring
2020-09-17 11:12 ` Jonathan Neuschäfer
2020-09-05 13:32 ` [PATCH v2 03/10] mfd: Add base driver for Netronix " Jonathan Neuschäfer
2020-09-08 13:29 ` Lee Jones
2020-09-10 12:04 ` Jonathan Neuschäfer
2020-09-05 13:32 ` Jonathan Neuschäfer [this message]
2020-09-15 0:54 ` [PATCH v2 04/10] dt-bindings: pwm: Add bindings for PWM function in Netronix EC Rob Herring
2020-09-15 6:23 ` Andreas Kemnade
2020-09-15 14:31 ` Rob Herring
2020-09-17 11:58 ` Jonathan Neuschäfer
2020-09-05 13:32 ` [PATCH v2 05/10] pwm: ntxec: Add driver " Jonathan Neuschäfer
[not found] ` <CAHp75VdUHoOyM3bObzhdfiqpne0AmSK_UakteTZxnjqJVrNV9A@mail.gmail.com>
2020-09-08 8:14 ` Lee Jones
2020-09-08 8:47 ` Andy Shevchenko
2020-09-08 9:35 ` Lee Jones
2020-09-10 19:13 ` Jonathan Neuschäfer
2020-09-10 19:09 ` Jonathan Neuschäfer
2020-09-05 13:32 ` [PATCH v2 06/10] dt-bindings: rtc: Add bindings for Netronix embedded controller RTC Jonathan Neuschäfer
2020-09-05 13:32 ` [PATCH v2 07/10] rtc: Introduce RTC_TIMESTAMP_END_2255 Jonathan Neuschäfer
2020-09-08 9:39 ` Alexandre Belloni
2020-09-10 19:21 ` Jonathan Neuschäfer
2020-09-05 14:45 ` [PATCH v2 08/10] rtc: New driver for RTC in Netronix embedded controller Jonathan Neuschäfer
[not found] ` <CAHp75Vca+Tp0v_Q4RBuUNSo_5aq_u6mBGeXecHULC1Avgm5=Xg@mail.gmail.com>
2020-09-10 19:42 ` Jonathan Neuschäfer
2020-09-05 14:45 ` [PATCH v2 09/10] MAINTAINERS: Add entry for " Jonathan Neuschäfer
2020-09-05 14:45 ` [PATCH v2 10/10] ARM: dts: imx50-kobo-aura: Add " Jonathan Neuschäfer
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