linux-kernel - [PATCH 3/6] arm64: dts: renesas: r8a7795: zap dma configuration in scif2

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Date:   Sat,  4 May 2019 02:42:55 +0200
From:   Eugeniu Rosca <roscaeugeniu@...il.com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Simon Horman <horms+renesas@...ge.net.au>,
        Chris Brandt <chris.brandt@...esas.com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Ulrich Hecht <ulrich.hecht+renesas@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     "George G . Davis" <george_davis@...tor.com>,
        Andy Lowe <andy_lowe@...tor.com>,
        linux-renesas-soc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Eugeniu Rosca <erosca@...adit-jv.com>,
        Eugeniu Rosca <roscaeugeniu@...il.com>
Subject: [PATCH 3/6] arm64: dts: renesas: r8a7795: zap dma configuration in scif2

Both empirically and based on the existing documentation, it looks like
SCIF2 does not support DMA. Let's disable it. Full reasoning is given in
commit ("Revert "arm64: dts: renesas: r8a7796: Enable DMA for SCIF2"").

Fixes: eb21089c32054e ("arm64: dts: renesas: r8a7795: Add missing SYS-DMAC2 dmas")
Fixes: 49af46b4095672 ("arm64: renesas: r8a7795: Add all SCIF nodes")
Signed-off-by: Eugeniu Rosca <erosca@...adit-jv.com>
---
 arch/arm64/boot/dts/renesas/r8a7795.dtsi | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/r8a7795.dtsi b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
index abeac3059383..7704bd46afdf 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
@@ -1323,9 +1323,6 @@
 				 <&cpg CPG_CORE R8A7795_CLK_S3D1>,
 				 <&scif_clk>;
 			clock-names = "fck", "brg_int", "scif_clk";
-			dmas = <&dmac1 0x13>, <&dmac1 0x12>,
-			       <&dmac2 0x13>, <&dmac2 0x12>;
-			dma-names = "tx", "rx", "tx", "rx";
 			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			resets = <&cpg 310>;
 			status = "disabled";
-- 
2.21.0