Re: [PATCH v2 1/1] serial: 8250_of: Add clock_notifier

[Herve Codina]

Hi Bastien,

On Fri,  5 Apr 2024 14:05:52 +0200
Bastien Curutchet <bastien.curutchet@xxxxxxxxxxx> wrote:

> The UART's input clock rate can change at runtime but this is not
> handled by the driver.
> 
> Add a clock_notifier callback that updates the divisors when the input
> clock is updated. The serial8250_update_uartclk() is used to do so.
> PRE_RATE_CHANGE and ABORT_RATE_CHANGE notifications are ignored, only
> the POST_RATE_CHANGE is used. Not using PRE_RATE_CHANGE notification can
> result in a few corrupted bytes during frequency transitions but, IMHO,
> it can be acceptable in many use cases.
> 
> It has been tested on a DAVINCI/OMAP-L138 processor.
> 
> Signed-off-by: Bastien Curutchet <bastien.curutchet@xxxxxxxxxxx>

Reviewed-by: Herve Codina <herve.codina@xxxxxxxxxxx>

Best regards,
Hervé