[PATCH v5 2/2] serial: zynqmp: Fetch baudrate from dtb and update

[Michal Simek]

On 6/7/23 21:13, Tom Rini wrote:
> On Thu, May 25, 2023 at 09:32:59AM +0530, Venkatesh Yadav Abbarapu wrote:
> 
>> From: Algapally Santosh Sagar <santoshsagar.algapally at amd.com>
>>
>> The baudrate configured in .config is taken by default by serial. If
>> change of baudrate is required then the .config needs to changed and
>> u-boot recompilation is required or the u-boot environment needs to be
>> updated.
>>
>> To avoid this, support is added to fetch the baudrate directly from the
>> device tree file and update.
>> The serial, prints the log with the configured baudrate in the dtb.
>> The commit c4df0f6f315c ("arm: mvebu: Espressobin: Set default value for
>> $fdtfile env variable") is taken as reference for changing the default
>> environment variable.
>>
>> The default environment stores the default baudrate value, When default
>> baudrate and dtb baudrate are not same glitches are seen on the serial.
>> So, the environment also needs to be updated with the dtb baudrate to
>> avoid the glitches on the serial.
>>
>> Signed-off-by: Algapally Santosh Sagar <santoshsagar.algapally at amd.com>
>> Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu at amd.com>
>> ---
>>   doc/README.serial_dt_baud      | 41 +++++++++++++++++++++++++++++++++
> 
> Sorry I missed this until v5.  This needs to be in rST and under doc/
> somewhere (and make htmldocs happy).

Any other issue with implementation?

M