[U-Boot] [PATCH] dm: ns16550: Add support for reg-offset property

[Derald D. Woods]

On Wed, Feb 24, 2016 at 12:26:09PM +0100, Michal Simek wrote:
> On 24.2.2016 11:56, Adam Ford wrote:
> > On Tue, Feb 23, 2016 at 12:38 AM, Simon Glass <sjg at chromium.org> wrote:
> >> Hi Michal,
> >>
> >> On 22 February 2016 at 00:40, Michal Simek <michal.simek at xilinx.com> wrote:
> >>> On 19.2.2016 21:55, Simon Glass wrote:
> >>>> Hi Michal,
> >>>>
> >>>> On 16 February 2016 at 08:17, Michal Simek <michal.simek at xilinx.com> wrote:
> >>>>> reg-offset is the part of standard 8250 binding in the kernel.
> >>>>> It is shifting start of address space by reg-offset.
> >>>>> On Xilinx platform this offset is typically 0x1000.
> >>>>>
> >>>>> Signed-off-by: Michal Simek <michal.simek at xilinx.com>
> >>>>> ---
> >>>>>
> >>>>>  drivers/serial/ns16550.c | 6 ++++--
> >>>>>  include/ns16550.h        | 1 +
> >>>>>  2 files changed, 5 insertions(+), 2 deletions(-)
> >>>>
> >>>> Reviewed-by: Simon Glass <sjg at chromium.org>
> >>>>
> >>>> Do you support the debug UART feature on your boards?
> >>>
> >>> yes. I do support it but there you can put just address plus offset and
> >>> there is no reason to add one more option to Kconfig.
> >>> But let me know if you think that this is incorrect flow.
> >>
> > 
> > This patch seems to break my OMAP3 board.  Does anyone know if I need
> > to set a certain offset for OMAP3 to make this work (and where is the
> > right place for it) ?
> 
> Are you using DT init? Check your DT description if there is reg-offset
> property. I expect if your board worked before and you remove this
> property it will start to work again.
> 

Would it be appropriate to initialize 'plat->reg_offset' to zero for the
non-OF_CONTROL cases?

Derald D. Woods

> Thanks,
> Michal
> 
> 
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