linux-kernel - [PATCH 5.10 10/19] arm64: dts: renesas: beacon: Fix USB ref clock references

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Date:   Fri, 13 Aug 2021 17:07:27 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Adam Ford <aford173@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH 5.10 10/19] arm64: dts: renesas: beacon: Fix USB ref clock references

From: Adam Ford <aford173@...il.com>

commit ebc666f39ff67a01e748c34d670ddf05a9e45220 upstream

The RZ/G2 boards expect there to be an external clock reference for
USB2 EHCI controllers.  For the Beacon boards, this reference clock
is controlled by a programmable versaclock.  Because the RZ/G2
family has 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@...il.com>
Link: https://lore.kernel.org/r/20210513114617.30191-2-aford173@gmail.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- 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 {