tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
dmaengine: dw: select DW_DMAC_BIG_ENDIAN_IO automagically
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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drivers/dma/dw/Kconfig
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drivers/dma/dw/Kconfig
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config DW_DMAC
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tristate "Synopsys DesignWare AHB DMA platform driver"
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select DW_DMAC_CORE
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select DW_DMAC_BIG_ENDIAN_IO if AVR32
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default y if CPU_AT32AP7000
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help
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Support the Synopsys DesignWare AHB DMA controller. This
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Intel Medfield has integrated this GPDMA controller.
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config DW_DMAC_BIG_ENDIAN_IO
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bool "Use big endian I/O register access"
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default y if AVR32
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depends on DW_DMAC_CORE
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help
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Say yes here to use big endian I/O access when reading and writing
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to the DMA controller registers. This is needed on some platforms,
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like the Atmel AVR32 architecture.
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If unsure, use the default setting.
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bool
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drivers/dma/dw/regs.h
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drivers/dma/dw/regs.h
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u32 DW_PARAMS;
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};
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/*
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* Big endian I/O access when reading and writing to the DMA controller
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* registers. This is needed on some platforms, like the Atmel AVR32
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* architecture.
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*/
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#ifdef CONFIG_DW_DMAC_BIG_ENDIAN_IO
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#define dma_readl_native ioread32be
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#define dma_writel_native iowrite32be