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From:   Adam Ford <aford173@gmail.com>
To:     linux-arm-kernel@lists.infradead.org
Cc:     aford@beaconembedded.com, Adam Ford <aford173@gmail.com>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Magnus Damm <magnus.damm@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH 2/3] arm64: dts: renesas: beacon: Fix USB ref clock references
Date:   Thu, 13 May 2021 06:46:16 -0500
Message-Id: <20210513114617.30191-2-aford173@gmail.com>
In-Reply-To: <20210513114617.30191-1-aford173@gmail.com>
References: <20210513114617.30191-1-aford173@gmail.com>
Precedence: bulk

The RZ/G2 boards expect there to be a external clock reference for
USB2 EHCI controllers.  For the Beacon boards, this reference clock
is controlled by a programmable verasaclock.  Because the RZ/G2
family have a special clock driver when using an external clock,
the third clock reference in the EHCI node needs to point to this
special clock, called usb2_clksel.

Since the usb2_clksel does not keep the usb_extal clock enabled,
the 4th clock entry for the EHCI nodes needs to reference it to
keep the clock running and make USB functional.

Signed-off-by: Adam Ford <aford173@gmail.com>

diff --git a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
index d8046fedf9c1..e3c8b2fe143e 100644
--- a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
+++ b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
@@ -271,12 +271,12 @@
 &ehci0 {
 	dr_mode = "otg";
 	status = "okay";
-	clocks = <&cpg CPG_MOD 703>, <&cpg CPG_MOD 704>;
+	clocks = <&cpg CPG_MOD 703>, <&cpg CPG_MOD 704>, <&usb2_clksel>, <&versaclock5 3>;
 };
 
 &ehci1 {
 	status = "okay";
-	clocks = <&cpg CPG_MOD 703>, <&cpg CPG_MOD 704>;
+	clocks = <&cpg CPG_MOD 703>, <&cpg CPG_MOD 704>, <&usb2_clksel>, <&versaclock5 3>;
 };
 
 &hdmi0 {
-- 
2.17.1