| Message ID | 20180721143436.43675-1-ysato@users.sourceforge.jp (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index c181eb37f985..3c7326e11d37 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -2863,10 +2863,12 @@ static int sci_init_single(struct platform_device *dev, port->fifosize = sci_port->params->fifosize; if (port->type == PORT_SCI) { - if (sci_port->reg_size >= 0x20) - port->regshift = 2; - else - port->regshift = 1; + /* + * reg_size < 0x10: BYTE aligned (scale factor=1). + * reg_size >= 0x10 and < 0x20: WORD aligned (scale factor=2). + * reg_size >= 0x20: DWORD aligned (scale factor=4). + */ + port->regshift = sci_port->reg_size >> 4; } /*
H8/300 SCI registers allocated byte address. It must support to the case where shift count is 0. Changes v2. more simply code. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> --- drivers/tty/serial/sh-sci.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)