linux-kernel - [PATCH v8 2/4] riscv: dts: Add dma-channels property and modify compatible

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Message-Id: <d19daa503fb242eef00d79082931199cb3e48021.1648461096.git.zong.li@sifive.com>
Date:   Mon, 28 Mar 2022 17:52:23 +0800
From:   Zong Li <zong.li@...ive.com>
To:     robh+dt@...nel.org, paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, krzysztof.kozlowski@...onical.com,
        conor.dooley@...rochip.com, geert@...ux-m68k.org,
        bin.meng@...driver.com, green.wan@...ive.com, vkoul@...nel.org,
        dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org
Cc:     Zong Li <zong.li@...ive.com>, Palmer Dabbelt <palmer@...osinc.com>
Subject: [PATCH v8 2/4] riscv: dts: Add dma-channels property and modify compatible

Add dma-channels property, then we can determine how many channels there
by device tree, in addition, we add the pdma versioning scheme for
compatible.

Signed-off-by: Zong Li <zong.li@...ive.com>
Reviewed-by: Palmer Dabbelt <palmer@...osinc.com>
Acked-by: Palmer Dabbelt <palmer@...osinc.com>
Acked-by: Conor Dooley <conor.dooley@...rochip.com>
---
 arch/riscv/boot/dts/sifive/fu540-c000.dtsi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/sifive/fu540-c000.dtsi b/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
index 3eef52b1a59b..6a3011180846 100644
--- a/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
+++ b/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
@@ -168,11 +168,12 @@ uart0: serial@...10000 {
 			status = "disabled";
 		};
 		dma: dma@...0000 {
-			compatible = "sifive,fu540-c000-pdma";
+			compatible = "sifive,fu540-c000-pdma", "sifive,pdma0";
 			reg = <0x0 0x3000000 0x0 0x8000>;
 			interrupt-parent = <&plic0>;
 			interrupts = <23>, <24>, <25>, <26>, <27>, <28>, <29>,
 				     <30>;
+			dma-channels = <4>;
 			#dma-cells = <1>;
 		};
 		uart1: serial@...11000 {
-- 
2.35.1