[Xen-devel] [PATCH v2 0/2] Raspberry Pi 4 support

[Stewart Hildebrand <stewart.hildebrand@xxxxxxxxxxxxxxx>]

This is a series to enable UART console for Raspberry Pi 4. Note that I'm 
relying on the firmware to initialize the UART (i.e. enable_uart=1 in 
config.txt), since full UART initialization on this platform requires accessing 
some registers outside the range specified in the brcm,bcm2835-aux-uart node.

I have been able to get Xen+dom0+domUs booting. Tested with Xen 4.12 and 
4.13-unstable (b4c8a27d5b) and Linux 4.19.y (Raspberry Pi linux tree + a couple 
of patches). Please see [1] for build instructions and limitations.

New in v2:
* Drop early printk alias
* Set reg-shift and reg-io-width in the Xen driver
* Blacklist other aux peripherals in platform settings (spi1, spi2, and a 
couple of base aux registers)

Thanks,
Stewart Hildebrand
DornerWorks, Ltd

[1] https://github.com/dornerworks/xen-rpi4-builder

Stewart Hildebrand (2):
  ns16550: Add compatible string for Raspberry Pi 4
  xen/arm: platform: Add Raspberry Pi platform

 xen/arch/arm/platforms/Makefile            |  1 +
 xen/arch/arm/platforms/brcm-raspberry-pi.c | 55 ++++++++++++++++++++++
 xen/drivers/char/ns16550.c                 |  7 +++
 3 files changed, 63 insertions(+)
 create mode 100644 xen/arch/arm/platforms/brcm-raspberry-pi.c

-- 
2.22.0


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