forked from luck/tmp_suning_uos_patched
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 <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>
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@ -27,6 +27,10 @@ Optional properties:
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general purpose DMA channel allocator. False if not passed.
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general purpose DMA channel allocator. False if not passed.
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- multi-block: Multi block transfers supported by hardware. Array property with
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- multi-block: Multi block transfers supported by hardware. Array property with
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one cell per channel. 0: not supported, 1 (default): supported.
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one cell per channel. 0: not supported, 1 (default): supported.
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- snps,dma-protection-control: AHB HPROT[3:1] protection setting.
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The default value is 0 (for non-cacheable, non-buffered,
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unprivileged data access).
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Refer to include/dt-bindings/dma/dw-dmac.h for possible values.
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Example:
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Example:
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@ -14363,9 +14363,11 @@ SYNOPSYS DESIGNWARE DMAC DRIVER
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M: Viresh Kumar <vireshk@kernel.org>
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M: Viresh Kumar <vireshk@kernel.org>
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R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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S: Maintained
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S: Maintained
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F: Documentation/devicetree/bindings/dma/snps-dma.txt
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F: drivers/dma/dw/
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F: include/dt-bindings/dma/dw-dmac.h
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F: include/linux/dma/dw.h
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F: include/linux/dma/dw.h
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F: include/linux/platform_data/dma-dw.h
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F: include/linux/platform_data/dma-dw.h
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F: drivers/dma/dw/
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SYNOPSYS DESIGNWARE ENTERPRISE ETHERNET DRIVER
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SYNOPSYS DESIGNWARE ENTERPRISE ETHERNET DRIVER
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M: Jose Abreu <Jose.Abreu@synopsys.com>
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M: Jose Abreu <Jose.Abreu@synopsys.com>
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14
include/dt-bindings/dma/dw-dmac.h
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14
include/dt-bindings/dma/dw-dmac.h
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@ -0,0 +1,14 @@
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/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
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#ifndef __DT_BINDINGS_DMA_DW_DMAC_H__
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#define __DT_BINDINGS_DMA_DW_DMAC_H__
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/*
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* Protection Control bits provide protection against illegal transactions.
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* The protection bits[0:2] are one-to-one mapped to AHB HPROT[3:1] signals.
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*/
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#define DW_DMAC_HPROT1_PRIVILEGED_MODE (1 << 0) /* Privileged Mode */
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#define DW_DMAC_HPROT2_BUFFERABLE (1 << 1) /* DMA is bufferable */
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#define DW_DMAC_HPROT3_CACHEABLE (1 << 2) /* DMA is cacheable */
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#endif /* __DT_BINDINGS_DMA_DW_DMAC_H__ */
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