linux-kernel - [PATCH v2 06/10] dt-bindings: rtc: Add bindings for Netronix embedded controller RTC

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Date:   Sat,  5 Sep 2020 15:32:26 +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>,
        Arnd Bergmann <arnd@...db.de>, Daniel Palmer <daniel@...f.com>
Subject: [PATCH v2 06/10] dt-bindings: rtc: Add bindings for Netronix embedded controller RTC

The Netronix EC implements an RTC with the following functionality:

- Calendar-based time keeping with single-second resolution
- Automatic power-on with single-minute resolution
- Alarm at single-second resolution

This binding only supports timekeeping for now.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@....net>
---

v2:
- Add plaintext binding to the patch description, for reference


For reference, here is the binding in text form:


  Netronix embedded controller RTC

  Required properties:

  - compatible: should be "netronix,ntxec-rtc"


  Example:

  	embedded-controller@43 {
  		compatible = "netronix,ntxec";
  		...

  		rtc {
  			compatible = "netronix,ntxec-rtc";
  		};
  	}
---
 .../bindings/mfd/netronix,ntxec.yaml          |  7 +++++
 .../bindings/rtc/netronix,ntxec-rtc.yaml      | 27 +++++++++++++++++++
 2 files changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/netronix,ntxec-rtc.yaml

diff --git a/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml b/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml
index 73c873dda3e70..7e1a21a82d82b 100644
--- a/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml
+++ b/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml
@@ -34,6 +34,9 @@ properties:
   pwm:
     $ref: ../pwm/netronix,ntxec-pwm.yaml

+  rtc:
+    $ref: ../rtc/netronix,ntxec-rtc.yaml
+
 required:
   - compatible
   - reg
@@ -61,6 +64,10 @@ examples:
                             compatible = "netronix,ntxec-pwm";
                             #pwm-cells = <2>;
                     };
+
+                    rtc {
+                            compatible = "netronix,ntxec-rtc";
+                    };
             };
     };

diff --git a/Documentation/devicetree/bindings/rtc/netronix,ntxec-rtc.yaml b/Documentation/devicetree/bindings/rtc/netronix,ntxec-rtc.yaml
new file mode 100644
index 0000000000000..4b301ef7319c8
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/netronix,ntxec-rtc.yaml
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/netronix,ntxec-rtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: RTC functionality in Netronix embedded controller
+
+maintainers:
+  - Jonathan Neuschäfer <j.neuschaefer@....net>
+
+description: |
+  See also Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml
+
+  The Netronix EC contains an RTC, which can be used for time-keeping, alarm,
+  and automatic power-on. Note that not all of this functionality is currently
+  supported in this binding.
+
+allOf:
+  - $ref: "rtc.yaml#"
+
+properties:
+  compatible:
+    const: netronix,ntxec-rtc
+
+required:
+  - compatible
--
2.28.0