On 27.02.2016, at 00:05, Eric Anholt [off-list ref] wrote:

Here's a series to enable the SDHOST controller.  It gives us better
performance than our old sdhci-bcm2835.c.  The downstream Raspberry Pi
kernel appears to be using this controller by default at this point.

I've tried to do some testing on it (mounting filesystem,
reading/writing files, speed tests), but I'm not sure what a good
testing regimen for storage drivers would be.

Eric Anholt (4):
 dt-bindings: Add binding for brcm,bcm2835-sdhost.
 mmc: bcm2835-sdhost: Add new driver for the internal SD controller.
 ARM: bcm2835: Include SDHOST in the device tree.
 ARM: bcm2835: Enable SDHOST by default.

This patchset misses defconfig changes to enable
the new sdhost driver.

So we end up with a default kernel
without the sdhost driver compiled in
but with sdhost enabled in the default device-tree (patch4)
resulting in a system that does not boot.

Thanks,
	Martin