xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

dt-bindings: dmaengine: dw-dmac: add protection control property

Browse Source 
This patch for the DesignWare AHB Central
Direct Memory Access Controller adds the dma
protection control property:
	"snps,dma-protection-control"

as well as the properties specific values defines into
a new include file: include/dt-bindings/dma/dw-dmac.h

Note: The protection control signals are one-to-one
mapped to the AHB HPROT[1:3] signals for this controller.
The HPROT0 (Data Access) is always hardwired to 1.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Christian Lamparter
2018-11-17 17:17:20 +01:00
committed by Vinod Koul
parent 651022382c
commit 538098281c
3 changed files with 21 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
include/dt-bindings/dma/dw-dmac.h Normal file
View File

@@ -0,0 +1,14 @@
/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
#ifndef __DT_BINDINGS_DMA_DW_DMAC_H__
#define __DT_BINDINGS_DMA_DW_DMAC_H__
/*
* Protection Control bits provide protection against illegal transactions.
* The protection bits[0:2] are one-to-one mapped to AHB HPROT[3:1] signals.
*/
#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__ */