| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374 |
- From 538098281ce884a51d2aa4ab445056a41741c6ad Mon Sep 17 00:00:00 2001
- From: Christian Lamparter <[email protected]>
- Date: Sat, 17 Nov 2018 17:17:20 +0100
- Subject: [PATCH] dt-bindings: dmaengine: dw-dmac: add protection control
- property
- 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 <[email protected]>
- Reviewed-by: Rob Herring <[email protected]>
- Signed-off-by: Christian Lamparter <[email protected]>
- Signed-off-by: Vinod Koul <[email protected]>
- ---
- Documentation/devicetree/bindings/dma/snps-dma.txt | 4 ++++
- MAINTAINERS | 4 +++-
- include/dt-bindings/dma/dw-dmac.h | 14 ++++++++++++++
- 3 files changed, 21 insertions(+), 1 deletion(-)
- create mode 100644 include/dt-bindings/dma/dw-dmac.h
- --- a/Documentation/devicetree/bindings/dma/snps-dma.txt
- +++ b/Documentation/devicetree/bindings/dma/snps-dma.txt
- @@ -27,6 +27,10 @@ Optional properties:
- general purpose DMA channel allocator. False if not passed.
- - multi-block: Multi block transfers supported by hardware. Array property with
- one cell per channel. 0: not supported, 1 (default): supported.
- +- snps,dma-protection-control: AHB HPROT[3:1] protection setting.
- + The default value is 0 (for non-cacheable, non-buffered,
- + unprivileged data access).
- + Refer to include/dt-bindings/dma/dw-dmac.h for possible values.
-
- Example:
-
- --- a/MAINTAINERS
- +++ b/MAINTAINERS
- @@ -14075,9 +14075,11 @@ SYNOPSYS DESIGNWARE DMAC DRIVER
- M: Viresh Kumar <[email protected]>
- R: Andy Shevchenko <[email protected]>
- S: Maintained
- +F: Documentation/devicetree/bindings/dma/snps-dma.txt
- +F: drivers/dma/dw/
- +F: include/dt-bindings/dma/dw-dmac.h
- F: include/linux/dma/dw.h
- F: include/linux/platform_data/dma-dw.h
- -F: drivers/dma/dw/
-
- SYNOPSYS DESIGNWARE ENTERPRISE ETHERNET DRIVER
- M: Jose Abreu <[email protected]>
- --- /dev/null
- +++ b/include/dt-bindings/dma/dw-dmac.h
- @@ -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__ */
|
