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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2015-01-07 18:15:00 +0300
committerMark Brown <broonie@kernel.org>2015-01-07 21:01:06 +0300
commitd58cf5ff6500522880683ce90d9caa79af385ed8 (patch)
tree7132869782b659c5f1f02f39c79c165e9709913b /README
parent30b4b703a5d5aa9977f5ad3aba3d77b6b8d0d255 (diff)
downloadlinux-d58cf5ff6500522880683ce90d9caa79af385ed8.tar.xz
spi: dw-pci: describe Intel MID controllers better
There are more that one SPI controller on the Intel MID boards. This patch describes the status and IDs of them. From now on we also have to care about bus number that must be unique per host. According to the specification the SPI1 has 5 bits for chip selects and SPI2 only 2 bits. The patch makes it depend to PCI ID. The first controller (SPI1) is DMA capable, meanwhile SPI2 can share same channels (via software switch) such functionality is not in the scope of this patch. Thus, attempt to init DMA for SPI2 will always fail for now. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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