Am 2020-03-10 08:40, schrieb Michael Walle:
Am 2020-03-10 08:33, schrieb Michael Walle:
Use the correct device to request the DMA mapping. Otherwise the IOMMU
doesn't get the mapping and it will generate a page fault.
The error messages look like:
[ 3.008452] arm-smmu 5000000.iommu: Unhandled context fault:
fsr=0x402, iova=0xf9800000, fsynr=0x3f0022, cbfrsynra=0x828, cb=8
[ 3.020123] arm-smmu 5000000.iommu: Unhandled context fault:
fsr=0x402, iova=0xf9800000, fsynr=0x3f0022, cbfrsynra=0x828, cb=8
This was tested on a custom board with a LS1028A SoC.
Oh fu.. please disregard this patch. DMA mapping still isn't working.
Somehow I missed that the transfer mode was turned back to its default
XSPI mode.
Damn. I need more coffee.. this patch IS working. Only the first probe
fails due to EPROBE_DEFER.
[ 2.539706] fsl-dspi 2120000.spi: rx dma channel not available (-517)
[ 2.546200] fsl-dspi 2120000.spi: can't get dma channels
[ 3.622774] spi-nor spi1.0: w25q128fw (16384 Kbytes)
-michael
