Re: [PATCH 02/13] serial: linflexuart: Clean SLEEP bit in LINCR1 after suspend

[Larisa Ileana Grigore]

On 2/16/2026 10:22 PM, Frank Li wrote:
> On Mon, Feb 16, 2026 at 04:01:54PM +0100, Larisa Grigore wrote:
> > When coming back from reset, we need to re-initialize LINCR1 register.
> > SLEEP bit should be cleared, otherwise we can't enter INITM mode.
>
> serial: linflexuart: Clean SLEEP bit in LINCR1 at linflex_set_termios()
>
> Re-initialize LINCR1 register (Clear the SLEEP bit) at
> linflex_set_termios(), otherwise the controller cannot enter INITM mode
> after suspend/resume.
>
> Frank
> >

Thanks!

> > Fixes: 09864c1cdf5c ("tty: serial: Add linflexuart driver for S32V234")
> > Signed-off-by: Larisa Grigore <larisa.grigore@xxxxxxxxxxx>
> > ---
> >   drivers/tty/serial/fsl_linflexuart.c | 3 +--
> >   1 file changed, 1 insertion(+), 2 deletions(-)
> >
> > diff --git a/drivers/tty/serial/fsl_linflexuart.c b/drivers/tty/serial/fsl_linflexuart.c
> > index 5a410e2d56ac..016011fd8760 100644
> > --- a/drivers/tty/serial/fsl_linflexuart.c
> > +++ b/drivers/tty/serial/fsl_linflexuart.c
> > @@ -413,8 +413,7 @@ linflex_set_termios(struct uart_port *port, struct ktermios *termios,
> >   	old_cr = cr;
> >
> >   	/* Enter initialization mode by setting INIT bit */
> > -	cr1 = readl(port->membase + LINCR1);
> > -	cr1 |= LINFLEXD_LINCR1_INIT;
> > +	cr1 = LINFLEXD_LINCR1_INIT | LINFLEXD_LINCR1_MME;
> >   	writel(cr1, port->membase + LINCR1);
> >
> >   	/* wait for init mode entry */
> > --
> > 2.47.0