BCM2836 (Raspberry Pi 2) port

Stephen Warren swarren at wwwdotorg.org
Tue Apr 28 19:38:52 PDT 2015

On 04/21/2015 12:09 PM, Eric Anholt wrote:
> This is my first submission of a Raspberry Pi 2 port.  It can be found
> at https://github.com/anholt/linux/tree/bcm2836
> I'm using the 2835 interrupt controller support, without adding the
> checks for ARM local interrupts first.  That means no support for IPIs
> (and thus no SMP), no PMU events, and no local timer (I'm using the
> same 2835 peripheral one).
> It supports a similar featureset to Pi 1 at this point.  Serial and SD
> cards work.  Just one CPU supported.  USB (ethernet) works if you use
> U-Boot, or my mailbox series
> (https://github.com/anholt/linux/tree/bcm2836-mbox).

Tested-by: Stephen Warren <swarren at wwwdotorg.org>

I applied the patches on top of korg's linux-rpi.git for-rpi-next,
resolved the io_map conflicts, and tested without U-Boot.

I'll try to work out why it doesn't work with U-Boot. I can't
immediately see anything in /proc/device-tree that indicates the RPi
firmware is modifying the DT that's passed to the kernel to exclude any
CPU1..3 spin tables, so either the kernel isn't hitting those purely by
luck, or I'm guessing wrong re: the issue with U-Boot.

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