openwrt/target/linux/apm821xx/patches-4.14/302-0001-dt-bindings-add-protection-control-property.patch

From bc183b1da77d6e2fbc801327a1811d446d34f54f Mon Sep 17 00:00:00 2001
From: Christian Lamparter <chunkeey@gmail.com>
Date: Wed, 31 Oct 2018 22:20:46 +0100
Subject: [PATCH 1/2] dt-bindings: add protection control property

This patch adds the protection control property and
dt-binding definitions for the DesignWare AHB Central
Direct Memory Access Controller.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
---
 include/dt-bindings/dma/dw-dmac.h             | 20 +++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletion(-)
 create mode 100644 include/dt-bindings/dma/dw-dmac.h

--- /dev/null
+++ b/include/dt-bindings/dma/dw-dmac.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+
+#ifndef __DT_BINDINGS_DMA_DW_DMAC_H__
+#define __DT_BINDINGS_DMA_DW_DMAC_H__
+
+#define DW_DMAC_CHAN_ALLOCATION_ASCENDING       0       /* zero to seven */
+#define DW_DMAC_CHAN_ALLOCATION_DESCENDING      1       /* seven to zero */
+#define DW_DMAC_CHAN_PRIORITY_ASCENDING         0       /* chan0 highest */
+#define DW_DMAC_CHAN_PRIORITY_DESCENDING        1       /* chan7 highest */
+
+/*
+ * Protection Control bits provide protection against illegal transactions.
+ * The protection bits[0:2] are one-to-one mapped to AHB HPROT[3:1] signals.
+ * The AHB HPROT[0] bit is hardwired to 1: Data Access.
+ */
+#define DW_DMAC_HPROT1_PRIVILEGED_MODE	(1 << 0)	/* Privileged Mode */
+#define DW_DMAC_HPROT2_BUFFERABLE	(1 << 1)	/* DMA is bufferable */
+#define DW_DMAC_HPROT3_CACHEABLE	(1 << 2)	/* DMA is cacheable */
+
+#endif /* __DT_BINDINGS_DMA_DW_DMAC_H__ */