linux-kernel - [PATCH 6/7] arm64: dts: exynos: Add PDMA node for Exynos850

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Date: Fri, 19 Jan 2024 19:29:47 -0600
From: Sam Protsenko <semen.protsenko@...aro.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Andi Shyti <andi.shyti@...nel.org>,
	Mark Brown <broonie@...nel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: Alim Akhtar <alim.akhtar@...sung.com>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Tomasz Figa <tomasz.figa@...il.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	linux-spi@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-clk@...r.kernel.org
Subject: [PATCH 6/7] arm64: dts: exynos: Add PDMA node for Exynos850

Enable PDMA node. It's needed for multiple peripheral modules, like SPI.
Use "arm,pl330-broken-no-flushp" quirk, as otherwise SPI transfers in
DMA mode often fail with error like this:

    I/O Error: rx-1 tx-1 rx-f tx-f len-786 dma-1 res-(-5)

Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
---
 arch/arm64/boot/dts/exynos/exynos850.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos850.dtsi b/arch/arm64/boot/dts/exynos/exynos850.dtsi
index da3f4a791e68..cd0a452cd6b4 100644
--- a/arch/arm64/boot/dts/exynos/exynos850.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos850.dtsi
@@ -197,6 +197,16 @@ gic: interrupt-controller@...01000 {
 						 IRQ_TYPE_LEVEL_HIGH)>;
 		};
 
+		pdma0: dma-controller@...c0000 {
+			compatible = "arm,pl330", "arm,primecell";
+			reg = <0x120c0000 0x1000>;
+			interrupts = <GIC_SPI 479 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cmu_core CLK_GOUT_PDMA_CORE_ACLK>;
+			clock-names = "apb_pclk";
+			arm,pl330-broken-no-flushp;
+			#dma-cells = <1>;
+		};
+
 		pmu_system_controller: system-controller@...60000 {
 			compatible = "samsung,exynos850-pmu", "syscon";
 			reg = <0x11860000 0x10000>;
-- 
2.39.2