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From:   Zong Li <zong.li@sifive.com>
To:     robh+dt@kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com,
        aou@eecs.berkeley.edu, krzysztof.kozlowski@canonical.com,
        conor.dooley@microchip.com, geert@linux-m68k.org,
        bin.meng@windriver.com, green.wan@sifive.com, vkoul@kernel.org,
        dmaengine@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org
Cc:     Zong Li <zong.li@sifive.com>, Palmer Dabbelt <palmer@rivosinc.com>
Subject: [PATCH v7 2/3] riscv: dts: Add dma-channels property and modify compatible
Date:   Mon,  7 Mar 2022 13:44:25 +0800
Message-Id: <b9ff5d8bef78d87d630d9defa5b39262f5abdcf5.1646631717.git.zong.li@sifive.com>
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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@sifive.com>
Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
---
 arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi | 3 ++-
 arch/riscv/boot/dts/sifive/fu540-c000.dtsi        | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi b/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi
index 869aaf0d5c06..d8869ec99945 100644
--- a/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi
+++ b/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi
@@ -187,11 +187,12 @@ plic: interrupt-controller@c000000 {
 		};
 
 		dma@3000000 {
-			compatible = "sifive,fu540-c000-pdma";
+			compatible = "sifive,fu540-c000-pdma", "sifive,pdma0";
 			reg = <0x0 0x3000000 0x0 0x8000>;
 			interrupt-parent = <&plic>;
 			interrupts = <23>, <24>, <25>, <26>, <27>, <28>, <29>,
 				     <30>;
+			dma-channels = <4>;
 			#dma-cells = <1>;
 		};
 
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@10010000 {
 			status = "disabled";
 		};
 		dma: dma@3000000 {
-			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@10011000 {
-- 
2.31.1