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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id l1sm10008335pgn.35.2022.01.16.17.35.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 16 Jan 2022 17:35:39 -0800 (PST) From: Zong Li 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 Subject: [PATCH v4 2/3] dt-bindings: Add dma-channels for pdma device node Date: Mon, 17 Jan 2022 09:35:27 +0800 Message-Id: <5db314b798cd9cfcb5cb61bc56515220b7d50315.1642383007.git.zong.li@sifive.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220116_173541_184667_3AFB4BD4 X-CRM114-Status: UNSURE ( 7.57 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add dma-channels property, then we can determine how many channels there by device tree, rather than statically defines it in PDMA driver Signed-off-by: Zong Li --- .../devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml index d32a71b975fe..3dbb8caefc17 100644 --- a/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml +++ b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml @@ -34,6 +34,12 @@ properties: minItems: 1 maxItems: 8 + dma-channels: + description: For backwards-compatible, the default value is 4 + minimum: 1 + maximum: 4 + default: 4 + '#dma-cells': const: 1 @@ -50,6 +56,7 @@ examples: dma@3000000 { compatible = "sifive,fu540-c000-pdma"; reg = <0x3000000 0x8000>; + dma-channels = <4>; interrupts = <23 24 25 26 27 28 29 30>; #dma-cells = <1>; };