> -----Original Message----- > From: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> > Sent: Thursday, June 25, 2020 4:23 PM > To: Vabhav Sharma (OSS) <vabhav.sharma@xxxxxxxxxxx> > Cc: jslaby@xxxxxxxx; linux-serial@xxxxxxxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx; Varun Sethi <V.Sethi@xxxxxxx> > Subject: Re: [PATCH] tty: serial: fsl_lpuart: minimum baud rate support > > On Thu, Jun 25, 2020 at 10:12:54AM +0000, Vabhav Sharma (OSS) wrote: > > > > > > > -----Original Message----- > > > From: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> > > > Sent: Thursday, June 25, 2020 3:34 PM > > > To: Vabhav Sharma (OSS) <vabhav.sharma@xxxxxxxxxxx> > > > Cc: jslaby@xxxxxxxx; linux-serial@xxxxxxxxxxxxxxx; linux- > > > kernel@xxxxxxxxxxxxxxx; Varun Sethi <V.Sethi@xxxxxxx>; Vabhav > Sharma > > > <vabhav.sharma@xxxxxxx> > > > Subject: Re: [PATCH] tty: serial: fsl_lpuart: minimum baud rate > > > support > > > > > > On Thu, Jun 25, 2020 at 03:19:05PM +0530, Vabhav Sharma wrote: > > > > From: Vabhav Sharma <vabhav.sharma@xxxxxxx> > > > > > > > > The formula for the baud rate is > > > > baud rate = "baud clock / ((OSR+1) × SBR) > > > > > > > > Algorithm used in function lpuart32_serial_setbrg() only changes > > > > the SBR. Even with maxmum value put in, OSR stays at 0x7 and the > > > > lowest baud rate would be ~ 2600 bps > > > > > > > > Update the algorithm to allow driver operation at 1200,2400 or > > > > 600 bps > > > > > > > > Signed-off-by: Vabhav Sharma <vabhav.sharma@xxxxxxx> > > > > --- > > > > drivers/tty/serial/fsl_lpuart.c | 4 ++++ > > > > 1 file changed, 4 insertions(+) > > > > > > > > diff --git a/drivers/tty/serial/fsl_lpuart.c > > > > b/drivers/tty/serial/fsl_lpuart.c index 90298c4..0fd0fa5f 100644 > > > > --- a/drivers/tty/serial/fsl_lpuart.c > > > > +++ b/drivers/tty/serial/fsl_lpuart.c > > > > @@ -1925,6 +1925,10 @@ static void __lpuart32_serial_setbrg(struct > > > uart_port *port, > > > > tmp_sbr++; > > > > } > > > > > > > > + if (tmp_sbr > UARTBAUD_SBR_MASK) { > > > > + continue; > > > > + } > > > > > > Always use scripts/checkpatch.pl on your patches so you do not get > > > grumpy emails from maintainers telling you to use > > > scripts/checkpatch.pl on your patches... > > Indeed, I run the script before sending patch ./scripts/checkpatch.pl > > 0001-tty-serial-fsl_lpuart-minimum-baud-rate-support.patch > > total: 0 errors, 0 warnings, 10 lines checked > > > > 0001-tty-serial-fsl_lpuart-minimum-baud-rate-support.patch has no > obvious style problems and is ready for submission. > > Ok, then something is wrong as there is obviously a coding style issue with > your submission, as you can see with a manual review of it, right? > > greg k-h I see, Unnecessary usage of brace for single statement. Thank you