[U-Boot] [PATCH v7 5/9] arm: serial: Add ability to use pre-initialized UARTs

[Tom Rini]

On Sun, Oct 18, 2015 at 08:41:59PM -0600, Simon Glass wrote:
> Hi Tom,
> 
> On 16 October 2015 at 18:23, Tom Rini <trini at konsulko.com> wrote:
> > On Fri, Oct 16, 2015 at 04:27:31PM -0600, Simon Glass wrote:
> >> Hi Linus,
> >>
> >> On 16 October 2015 at 15:23, Linus Walleij <linus.walleij at linaro.org> wrote:
> >> > On Wed, Oct 14, 2015 at 6:55 PM, Sergey Temerkhanov
> >> > <s.temerkhanov at gmail.com> wrote:
> >> >
> >> >> On some systems, UART initialization is performed before running U-Boot.
> >> >> This commit allows to skip UART re-initializaion on those systems
> >> >>
> >> >> Signed-off-by: Sergey Temerkhanov <s.temerkhanov at gmail.com>
> >> >> Signed-off-by: Radha Mohan Chintakuntla <rchintakuntla at cavium.com>
> >> >>
> >> >> Reviewed-by: Simon Glass <sjg at chromium.org>
> >> > (...)
> >> >
> >> >> diff --git a/doc/device-tree-bindings/serial/pl01x.txt b/doc/device-tree-bindings/serial/pl01x.txt
> >> >> index 61c27d1..0591497 100644
> >> >> --- a/doc/device-tree-bindings/serial/pl01x.txt
> >> >> +++ b/doc/device-tree-bindings/serial/pl01x.txt
> >> >> @@ -5,3 +5,6 @@ Required properties:
> >> >>  - reg: exactly one register range with length 0x1000
> >> >>  - clock: input clock frequency for the UART (used to calculate the baud
> >> >>    rate divisor)
> >> >> +
> >> >> +Optional properties:
> >> >> +- u-boot,skip-init: skip UART initialization at start.
> >> >
> >> > Again: get this merged in the Linux kernel FIRST. Is it?
> >>
> >> We had a little bit of a chat about this at ELCE. It would be great to
> >> get these changes merged with the kernel but the amount of
> >> push-back/energy it requires is still excessive IMO. Any thoughts?
> >
> > But it also requires that we try.  Did we try here?  My first thought is
> > that there's a number of things it would be nice to say "don't re-init
> > stuff" to the kernel as well.
> 
> See the thread that ends here:
> 
> http://lists.denx.de/pipermail/u-boot/2015-July/219283.html

Yes, I think maybe Geert was waiting for a reply or respin?

-- 
Tom
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