[PATCH] ARM: bcm2835: override the HW UART periphid

Olof Johansson olof at lixom.net
Sat Jun 1 02:43:13 EDT 2013

On Wed, May 29, 2013 at 10:07:39PM -0600, Stephen Warren wrote:
> From: Jongsung Kim <neidhard.kim at lge.com>
> Stephen Warren reported the recent commit 78506f2 (add support for
> extended FIFO-size of PL011-r1p5) breaks the serial port on the
> BCM2835 ARM SoC.
> A UART compatible with the ARM PL011-r1p5 should have 32-deep FIFOs.
> The BCM2835 UART just looks like an ARM PL011-r1p5, but has 16-deep
> FIFOs just like PL011-r1p4 or earlier revisions. As a workaround for
> this compatibility issue, this patch overrides the HW UART periphid
> register values with the actually compatible UART periphid 0x00241011
> (r1p3 or r1p4).
> Reported-by: Stephen Warren <swarren at wwwdotorg.org>
> Signed-off-by: Jongsung Kim <neidhard.kim at lge.com>
> Signed-off-by: Stephen Warren <swarren at wwwdotorg.org>
> ---
> This is a fix for v3.10-rc*.



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