linux-kernel - [PATCH v3 5/7] ARM: dts: wpcm450: Add clock controller node

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Date:   Sun,  8 May 2022 21:43:30 +0200
From:   Jonathan Neuschäfer <j.neuschaefer@....net>
To:     linux-clk@...r.kernel.org, openbmc@...ts.ozlabs.org
Cc:     linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org,
        devicetree@...r.kernel.org,
        Jonathan Neuschäfer <j.neuschaefer@....net>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Avi Fishman <avifishman70@...il.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH v3 5/7] ARM: dts: wpcm450: Add clock controller node

This declares the clock controller and the necessary 48 Mhz reference
clock in the WPCM450 device. Switching devices over to the clock
controller is intentionally done in a separate patch to give time for
the clock controller driver to land.

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

v3:
- Change clock-output-names and clock-names from "refclk" to "ref"

v2:
- https://lore.kernel.org/lkml/20220429172030.398011-6-j.neuschaefer@gmx.net/
- no changes
---
 arch/arm/boot/dts/nuvoton-wpcm450.dtsi | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm/boot/dts/nuvoton-wpcm450.dtsi b/arch/arm/boot/dts/nuvoton-wpcm450.dtsi
index 1c63ab14c4383..515e943787416 100644
--- a/arch/arm/boot/dts/nuvoton-wpcm450.dtsi
+++ b/arch/arm/boot/dts/nuvoton-wpcm450.dtsi
@@ -39,6 +39,14 @@ clk24m: clock-24mhz {
 		#clock-cells = <0>;
 	};

+	refclk: clock-48mhz {
+		/* 48 MHz reference oscillator */
+		compatible = "fixed-clock";
+		clock-output-names = "ref";
+		clock-frequency = <48000000>;
+		#clock-cells = <0>;
+	};
+
 	soc {
 		compatible = "simple-bus";
 		#address-cells = <1>;
@@ -51,6 +59,15 @@ gcr: syscon@...00000 {
 			reg = <0xb0000000 0x200>;
 		};

+		clk: clock-controller@...00200 {
+			compatible = "nuvoton,wpcm450-clk";
+			reg = <0xb0000200 0x100>;
+			clocks = <&refclk>;
+			clock-names = "ref";
+			#clock-cells = <1>;
+			#reset-cells = <1>;
+		};
+
 		serial0: serial@...00000 {
 			compatible = "nuvoton,wpcm450-uart";
 			reg = <0xb8000000 0x20>;
--
2.35.1