> -----Original Message----- > From: Nate Drude <nate.d@xxxxxxxxxxxxx> > Sent: 2022年12月22日 22:57 > To: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>; Jiri Slaby > <jirislaby@xxxxxxxxxx>; linux-serial@xxxxxxxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx; Sherry Sun <sherry.sun@xxxxxxx>; Fugang Duan > <fugang.duan@xxxxxxx> > Cc: eran.m@xxxxxxxxxxxxx; Nate Drude <Nate.D@xxxxxxxxxxxxx> > Subject: [PATCH] tty: serial: fsl_lpuart: increase maximum uart_nr to eight > > Some SoCs like the i.MX93 have aliases for up to eight UARTs, see: > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub > .com%2Ftorvalds%2Flinux%2Fblob%2Fv6.1%2Farch%2Farm64%2Fboot%2Fdt > s%2Ffreescale%2Fimx93.dtsi%23L31- > L38&data=05%7C01%7Csherry.sun%40nxp.com%7C09285ba3360a490bce660 > 8dae42cc2d3%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638073 > 178147509133%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJ > QIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdat > a=JIvAtw9%2B03uZWQ9OHT9VbmuMVQln0E7UsdQ9H%2FtRtdg%3D&reserv > ed=0 > > Increase UART_NR from 6 to 8 to support lpuart7 and lpuart8 and avoid > initialization failures like the following: > > [ 0.837146] fsl-lpuart 42690000.serial: serial6 out of range > [ 0.842814] fsl-lpuart: probe of 42690000.serial failed with error -22 > > Signed-off-by: Nate Drude <nate.d@xxxxxxxxxxxxx> Reviewed-by: Sherry Sun <sherry.sun@xxxxxxx> Best Regards Sherry > --- > drivers/tty/serial/fsl_lpuart.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c > index 900f9a0e4a5d..2e4af8e7a5b6 100644 > --- a/drivers/tty/serial/fsl_lpuart.c > +++ b/drivers/tty/serial/fsl_lpuart.c > @@ -246,7 +246,7 @@ > > #define DRIVER_NAME "fsl-lpuart" > #define DEV_NAME "ttyLP" > -#define UART_NR 6 > +#define UART_NR 8 > > /* IMX lpuart has four extra unused regs located at the beginning */ > #define IMX_REG_OFF 0x10 > -- > 2.38.2
