[version 2] amba uarts - arm type uarts fifo size provided by device tree
jorge.ramirez-ortiz at linaro.org
Mon Mar 9 05:25:19 PDT 2015
On 03/03/2015 11:55 AM, Mark Rutland wrote:
> On Wed, Feb 18, 2015 at 08:07:47PM +0000, Jorge Ramirez-Ortiz wrote:
>> [PATCH 1/2] Documentation: bindings: add optional fifo size property
>> [PATCH 2/2] drivers/tty: pl011: read fifo size from OF if present [updated]
>> These patches aim at resolving an issue present on some of the amba pl011 uarts.
>> They were developed for the Hisilicon Hi6220 SoC where the fifo size on the
>> uarts is 64 despite the amba revision having been set to 1.
> Are we certain that the FIFO length is the only difference between the
> HI6220 PL011 and a regular PL011?
you were right.
I just confirmed that there are a number of differences on top of the fifo size
requiring many additional software changes.
This is not great news since the uart announces itself as vendor_arm version 1.
so please discard this patch.
> It may be worth adding a compatible string in addition, just in case.
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