PL2303HXN (TYPE_HXN) can program form 1 bps to 12000000 bps and support standard & non-standard baud rates (Note 1) are set directly It doesn't need complicated baud rate division calculation. Note 1: Standard baud rate: 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600,14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800,614400, 921600, 1228800, 2457600, 3000000, 6000000 Non-standard baud rate (1 ~ 12000000): 1, 2, 5, 22, 55, 60, 75, 80, 123, 130, 150, 180, 187, 200, 300, 340, 400,..... 115200, 230400, 460800, 474747, 515151, 614400, 921600, .. 1000000,.. 7000000,.. 12000000 Signed-off-by: Charles Yeh <charlesyeh522@xxxxxxxxx> --- --- drivers/usb/serial/pl2303.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c index aab737e1e7b6..63d354a92db9 100644 --- a/drivers/usb/serial/pl2303.c +++ b/drivers/usb/serial/pl2303.c @@ -565,17 +565,21 @@ static void pl2303_encode_baud_rate(struct tty_struct *tty, if (!baud) return; - if (spriv->type->max_baud_rate) - baud = min_t(speed_t, baud, spriv->type->max_baud_rate); - /* - * Use direct method for supported baud rates, otherwise use divisors. - */ - baud_sup = pl2303_get_supported_baud_rate(baud); - - if (baud == baud_sup) + if (spriv->type == &pl2303_type_data[TYPE_HXN]) { baud = pl2303_encode_baud_rate_direct(buf, baud); - else - baud = pl2303_encode_baud_rate_divisor(buf, baud); + } else { + if (spriv->type->max_baud_rate) + baud = min_t(speed_t, baud, spriv->type->max_baud_rate); + /* + * Use direct method for supported baud rates, otherwise use divisors. + */ + baud_sup = pl2303_get_supported_baud_rate(baud); + + if (baud == baud_sup) + baud = pl2303_encode_baud_rate_direct(buf, baud); + else + baud = pl2303_encode_baud_rate_divisor(buf, baud); + } /* Save resulting baud rate */ tty_encode_baud_rate(tty, baud, baud); -- 2.20.1