Sorry, that means, most probably I don't understand something. The IC ST16C554D combines the package interface modes of the 16C554 and 68C554 series on a single integrated chip. Earlier, I assumed, 8250.c is supporting both modes of the circuit. Unfortunately I didn't understand the code of 8250.c enough to realise is 68 mode supported or not. Best regards, Dmitriy Alekseev ----- Original Message ----- From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> To: Dmitriy Alekseev <alexeev6@xxxxxxxxx> Cc: "linux-serial@xxxxxxxxxxxxxxx" <linux-serial@xxxxxxxxxxxxxxx>; Юрий Зверев <yury.zverev@xxxxxxxxx> Sent: Monday, May 28, 2012 9:12 PM Subject: Re: struct tty_flip_buffer replacement in newer kernels On Mon, 28 May 2012 05:40:15 -0700 (PDT) Dmitriy Alekseev <alexeev6@xxxxxxxxx> wrote: > Hi, > > My st16c554 chip is connected with cpu (at91rm9200) in 68 (Motorola) mode, and formally works as 68c554. > Is 8250 driver supports the 68 mode? > I thought the driver maintains whole 16c554 IC, or it means only mode 16 is supported? Not sure I understand the question -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html