linux-kernel - [PATCH 2/4] dt-bindings: dma: fsl-edma: Add fsl-edma.h to prevent hardcoding in dts

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Message-Id: <20231114154824.3617255-3-Frank.Li@nxp.com>
Date:   Tue, 14 Nov 2023 10:48:22 -0500
From:   Frank Li <Frank.Li@....com>
To:     krzysztof.kozlowski@...aro.org, shawnguo@...nel.org,
        festevam@...x.de
Cc:     Frank.li@....com, devicetree@...r.kernel.org,
        dmaengine@...r.kernel.org, imx@...ts.linux.dev, joy.zou@....com,
        krzysztof.kozlowski+dt@...aro.org, linux-kernel@...r.kernel.org,
        peng.fan@....com, robh+dt@...nel.org, shenwei.wang@....com,
        vkoul@...nel.org
Subject: [PATCH 2/4] dt-bindings: dma: fsl-edma: Add fsl-edma.h to prevent hardcoding in dts

Introduce a common dt-bindings header file, fsl-edma.h, shared between
the driver and dts files. This addition aims to eliminate hardcoded values
in dts files, promoting maintainability and consistency.

DTS header file not support BIT() macro yet. Directly use 2^n number.

Signed-off-by: Frank Li <Frank.Li@....com>
---
 include/dt-bindings/dma/fsl-edma.h | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 include/dt-bindings/dma/fsl-edma.h

diff --git a/include/dt-bindings/dma/fsl-edma.h b/include/dt-bindings/dma/fsl-edma.h
new file mode 100644
index 0000000000000..fd11478cfe9cc
--- /dev/null
+++ b/include/dt-bindings/dma/fsl-edma.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
+
+#ifndef _FSL_EDMA_DT_BINDING_H_
+#define _FSL_EDMA_DT_BINDING_H_
+
+/* Receive Channel */
+#define FSL_EDMA_RX		0x1
+
+/* iMX8 audio remote DMA */
+#define FSL_EDMA_REMOTE		0x2
+
+/* FIFO is continue memory region */
+#define FSL_EDMA_MULTI_FIFO	0x4
+
+/* Channel need stick to even channel */
+#define FSL_EDMA_EVEN_CH	0x8
+
+/* Channel need stick to odd channel */
+#define FSL_EDMA_ODD_CH		0x10
+
+#endif
-- 
2.34.1