David Hendricks 2928922336 tegra124: implement x2 mode for SPI transfers on CBFS media ... This implements x2 mode when reading CBFS media over SPI. In theory this effectively doubles our throughput, though the initial results were almost negligibly better. Using a logic analyzer we see a pattern of 12 clocks, ~70ns delay, 4 clocks, ~310ns delay. So if we want to see further gains here then we'll probably need to tune AHB arbitration and utilization to eliminate bubbles/stalls when copying from APB DMA. BUG=none BRANCH=none TEST=built and booted on Nyan. Signed-off-by: David Hendricks <dhendrix@chromium.org> Change-Id: I33d6ae30923fc42b4dc7103d029085985472cf3e Reviewed-on: https://chromium-review.googlesource.com/177835 Reviewed-by: Tom Warren <twarren@nvidia.com> Reviewed-by: David Hendricks <dhendrix@chromium.org> Commit-Queue: David Hendricks <dhendrix@chromium.org> Tested-by: David Hendricks <dhendrix@chromium.org>		2013-12-17 08:00:10 +00:00
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intel	baytrail: Expose IOSF as ACPI object	2013-12-14 02:31:42 +00:00
nvidia	tegra124: implement x2 mode for SPI transfers on CBFS media	2013-12-17 08:00:10 +00:00
samsung	Add check_member macro to allow clean and easy struct offset checking	2013-12-11 22:12:25 +00:00
Kconfig	ARM: Generalize armv7 as arm.	2013-10-02 09:18:44 +00:00
Makefile.inc	armv7: Move Exynos from 'cpu' to 'soc'.	2013-10-01 08:16:46 +00:00