linux-kernel - [PATCH] ARM: dts: armada-38x: Mark devices as dma-coherent

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Message-Id: <20221022234024.87475-1-mw@semihalf.com>
Date:   Sun, 23 Oct 2022 01:40:24 +0200
From:   Marcin Wojtas <mw@...ihalf.com>
To:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     andrew@...n.ch, gregory.clement@...tlin.com,
        sebastian.hesselbarth@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, hch@....de, kabel@...nel.org,
        jaz@...ihalf.com, Marcin Wojtas <mw@...ihalf.com>
Subject: [PATCH] ARM: dts: armada-38x: Mark devices as dma-coherent

Armada 38x platforms marks all devices as coherent via
mvebu_hwcc_notifier(), whereas the standard way to determine
this is by of_dma_is_coherent(). Reflect the hardware
capabilities by adding 'dma-coherent' properties to the device tree.

Signed-off-by: Marcin Wojtas <mw@...ihalf.com>
---
 arch/arm/boot/dts/armada-380.dtsi | 1 +
 arch/arm/boot/dts/armada-385.dtsi | 1 +
 arch/arm/boot/dts/armada-38x.dtsi | 1 +
 3 files changed, 3 insertions(+)

diff --git a/arch/arm/boot/dts/armada-380.dtsi b/arch/arm/boot/dts/armada-380.dtsi
index ce1dddb2269b..25d17550e2fc 100644
--- a/arch/arm/boot/dts/armada-380.dtsi
+++ b/arch/arm/boot/dts/armada-380.dtsi
@@ -38,6 +38,7 @@ pcie {
 			compatible = "marvell,armada-370-pcie";
 			status = "disabled";
 			device_type = "pci";
+			dma-coherent;
 
 			#address-cells = <3>;
 			#size-cells = <2>;
diff --git a/arch/arm/boot/dts/armada-385.dtsi b/arch/arm/boot/dts/armada-385.dtsi
index 83392b92dae2..6fb8c254cbdc 100644
--- a/arch/arm/boot/dts/armada-385.dtsi
+++ b/arch/arm/boot/dts/armada-385.dtsi
@@ -37,6 +37,7 @@ pciec: pcie {
 			compatible = "marvell,armada-370-pcie";
 			status = "disabled";
 			device_type = "pci";
+			dma-coherent;
 
 			#address-cells = <3>;
 			#size-cells = <2>;
diff --git a/arch/arm/boot/dts/armada-38x.dtsi b/arch/arm/boot/dts/armada-38x.dtsi
index 446861b6b17b..5801873dfcbe 100644
--- a/arch/arm/boot/dts/armada-38x.dtsi
+++ b/arch/arm/boot/dts/armada-38x.dtsi
@@ -102,6 +102,7 @@ internal-regs {
 			#address-cells = <1>;
 			#size-cells = <1>;
 			ranges = <0 MBUS_ID(0xf0, 0x01) 0 0x100000>;
+			dma-coherent;
 
 			sdramc: sdramc@...0 {
 				compatible = "marvell,armada-xp-sdram-controller";
-- 
2.29.0