Amba PL011 driver support

Amba PL011 driver support

[Gaurav Singh]

Hi all,
Currently I am working to port Barebox on an ARM11v6 based board. I
have a PL011 UART peripheral on my board and want to use this UART as
my console. I read somewhere that the PL010 serial driver would
support PL011 as well but I was unable to use this driver to bring up
the console.
Looking  at the device specifications I noticed that some changes to
the PL010 driver would suffce for my requirement and making these
changes I was able to initialize the console and use my UART for
entering bb commands.

Is there a requirement for a seperate PL011 driver in barebox at the
moment ? I notice that both U-boot and the kernel have seperate
drivers for PL010 and PL011.

Thanks and Regards
Gaurav Singh

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Re: Amba PL011 driver support

[Sascha Hauer]

Hi Gaurav,

On Fri, Jul 16, 2010 at 06:59:09PM +0530, Gaurav Singh wrote:
> Hi all,
> Currently I am working to port Barebox on an ARM11v6 based board. I
> have a PL011 UART peripheral on my board and want to use this UART as
> my console. I read somewhere that the PL010 serial driver would
> support PL011 as well but I was unable to use this driver to bring up
> the console.
> Looking  at the device specifications I noticed that some changes to
> the PL010 driver would suffce for my requirement and making these
> changes I was able to initialize the console and use my UART for
> entering bb commands.
> 
> Is there a requirement for a seperate PL011 driver in barebox at the
> moment ? I notice that both U-boot and the kernel have seperate
> drivers for PL010 and PL011.

No, there is no requirement for this. I don't know the differences
between the PL011 and the PL010, but if you manage to handle both in one
driver, maybe with a flag in platform_data specifying which type it is,
that's perfectly fine.

Sascha

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