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Message-Id: <20250919-rda8810pl-mmc-v1-3-d4f08a05ba4d@mainlining.org>
Date: Fri, 19 Sep 2025 01:48:43 +0700
From: Dang Huynh via B4 Relay <devnull+dang.huynh.mainlining.org@...nel.org>
To: Manivannan Sadhasivam <mani@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <brgl@...ev.pl>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>, Vinod Koul <vkoul@...nel.org>,
Ulf Hansson <ulf.hansson@...aro.org>,
Philipp Zabel <p.zabel@...gutronix.de>, Kees Cook <kees@...nel.org>,
"Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-unisoc@...ts.infradead.org,
linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
dmaengine@...r.kernel.org, linux-mmc@...r.kernel.org,
linux-hardening@...r.kernel.org, Dang Huynh <dang.huynh@...nlining.org>
Subject: [PATCH 03/10] dt-bindings: dma: Add RDA IFC DMA
From: Dang Huynh <dang.huynh@...nlining.org>
The Intelligent Flow Controller (IFC) is a scatter/gather DMA
controller.
Signed-off-by: Dang Huynh <dang.huynh@...nlining.org>
---
Documentation/devicetree/bindings/dma/rda,ifc.yaml | 45 ++++++++++++++++++++++
include/dt-bindings/dma/rda-ifc.h | 28 ++++++++++++++
2 files changed, 73 insertions(+)
diff --git a/Documentation/devicetree/bindings/dma/rda,ifc.yaml b/Documentation/devicetree/bindings/dma/rda,ifc.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..323e1e87cee09cfc7b64bf44bef61e4d1e91afa5
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/rda,ifc.yaml
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/rda,ifc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: RDA Intelligent Flow Controller (IFC)
+
+maintainers:
+ - Dang Huynh <dang.huynh@...nlining.org>
+
+description: |
+ RDA IFC is a DMA controller, it only supports scatter/gather lists.
+
+allOf:
+ - $ref: dma-controller.yaml#
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - rda,8810pl-ifc
+ - const: rda,ifc
+
+ reg:
+ maxItems: 1
+
+ "#dma-cells":
+ const: 1
+ description:
+ The cell corresponding to DMA request ID
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ dma-controller@...00 {
+ compatible = "rda,8810pl-ifc", "rda,ifc";
+ reg = <0xf0000 0x1000>;
+ #dma-cells = <1>;
+ };
diff --git a/include/dt-bindings/dma/rda-ifc.h b/include/dt-bindings/dma/rda-ifc.h
new file mode 100644
index 0000000000000000000000000000000000000000..af4bae0542aa71690351e2406d0945a61eff72c1
--- /dev/null
+++ b/include/dt-bindings/dma/rda-ifc.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
+
+#ifndef __DT_BINDINGS_DMA_RDA_IFC_H__
+#define __DT_BINDINGS_DMA_RDA_IFC_H__
+
+#define IFC_UART1_TX 0
+#define IFC_UART1_RX 1
+#define IFC_UART2_TX 2
+#define IFC_UART2_RX 3
+#define IFC_SPI1_TX 4
+#define IFC_SPI1_RX 5
+#define IFC_SPI2_TX 6
+#define IFC_SPI2_RX 7
+#define IFC_SPI3_TX 8
+#define IFC_SPI3_RX 9
+#define IFC_SDMMC1_TX 10
+#define IFC_SDMMC1_RX 11
+#define IFC_SDMMC2_TX 12
+#define IFC_SDMMC2_RX 13
+#define IFC_SDMMC3_TX 14
+#define IFC_SDMMC3_RX 15
+#define IFC_NFSC_TX 16
+#define IFC_NFSC_RX 17
+#define IFC_UART3_TX 18
+#define IFC_UART3_RX 19
+#define IFC_NO_REQUEST 20
+
+#endif /* __DT_BINDINGS_DMA_RDA_IFC_H__ */
--
2.51.0
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