linux-kernel - [PATCH v2 02/10] ARM: dts: sun6i: a31: Switch dma-names order for snps,dw-apb-uart nodes

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Message-Id: <20230321215624.78383-3-cristian.ciocaltea@collabora.com>
Date:   Tue, 21 Mar 2023 23:56:16 +0200
From:   Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Conor Dooley <conor@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Nicolas Frattaroli <frattaroli.nicolas@...il.com>
Cc:     linux-serial@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-rockchip@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, kernel@...labora.com
Subject: [PATCH v2 02/10] ARM: dts: sun6i: a31: Switch dma-names order for snps,dw-apb-uart nodes

Commit 370f696e4474 ("dt-bindings: serial: snps-dw-apb-uart: add dma &
dma-names properties") documented dma-names property to handle Allwinner
D1 dtbs_check warnings, but relies on the rx->tx ordering, which is the
reverse of what a bunch of different boards expect.

The initial proposed solution was to allow a flexible dma-names order in
the binding, due to potential ABI breakage concerns after fixing the DTS
files. But luckily the Allwinner boards are not affected, since they are
using a shared DMA channel for rx and tx.

Hence, the first step in fixing the inconsistency was to change
dma-names order in the binding to tx->rx.

Do the same for the snps,dw-apb-uart nodes in the DTS file.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
---
 arch/arm/boot/dts/sun6i-a31.dtsi | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/arm/boot/dts/sun6i-a31.dtsi b/arch/arm/boot/dts/sun6i-a31.dtsi
index 6cdadba6a3ac..5cce4918f84c 100644
--- a/arch/arm/boot/dts/sun6i-a31.dtsi
+++ b/arch/arm/boot/dts/sun6i-a31.dtsi
@@ -822,7 +822,7 @@ uart0: serial@...8000 {
 			clocks = <&ccu CLK_APB2_UART0>;
 			resets = <&ccu RST_APB2_UART0>;
 			dmas = <&dma 6>, <&dma 6>;
-			dma-names = "rx", "tx";
+			dma-names = "tx", "rx";
 			status = "disabled";
 		};
 
@@ -835,7 +835,7 @@ uart1: serial@...8400 {
 			clocks = <&ccu CLK_APB2_UART1>;
 			resets = <&ccu RST_APB2_UART1>;
 			dmas = <&dma 7>, <&dma 7>;
-			dma-names = "rx", "tx";
+			dma-names = "tx", "rx";
 			status = "disabled";
 		};
 
@@ -848,7 +848,7 @@ uart2: serial@...8800 {
 			clocks = <&ccu CLK_APB2_UART2>;
 			resets = <&ccu RST_APB2_UART2>;
 			dmas = <&dma 8>, <&dma 8>;
-			dma-names = "rx", "tx";
+			dma-names = "tx", "rx";
 			status = "disabled";
 		};
 
@@ -861,7 +861,7 @@ uart3: serial@...8c00 {
 			clocks = <&ccu CLK_APB2_UART3>;
 			resets = <&ccu RST_APB2_UART3>;
 			dmas = <&dma 9>, <&dma 9>;
-			dma-names = "rx", "tx";
+			dma-names = "tx", "rx";
 			status = "disabled";
 		};
 
@@ -874,7 +874,7 @@ uart4: serial@...9000 {
 			clocks = <&ccu CLK_APB2_UART4>;
 			resets = <&ccu RST_APB2_UART4>;
 			dmas = <&dma 10>, <&dma 10>;
-			dma-names = "rx", "tx";
+			dma-names = "tx", "rx";
 			status = "disabled";
 		};
 
@@ -887,7 +887,7 @@ uart5: serial@...9400 {
 			clocks = <&ccu CLK_APB2_UART5>;
 			resets = <&ccu RST_APB2_UART5>;
 			dmas = <&dma 22>, <&dma 22>;
-			dma-names = "rx", "tx";
+			dma-names = "tx", "rx";
 			status = "disabled";
 		};
 
-- 
2.40.0