diff options
| author | Andriy Gapon <avg@FreeBSD.org> | 2018-05-21 20:59:15 +0000 |
|---|---|---|
| committer | Andriy Gapon <avg@FreeBSD.org> | 2018-05-21 20:59:15 +0000 |
| commit | 7acd73fd1e23c9488ebd9bd5c42af3bf53d17576 (patch) | |
| tree | cdee53124b62ee9a66c2d834598d2f6af4e7b0a6 /sys/dev/usb/serial | |
| parent | 1d33c9a55f9107e7be89579d577d1d89b200a058 (diff) | |
Notes
Diffstat (limited to 'sys/dev/usb/serial')
| -rw-r--r-- | sys/dev/usb/serial/uchcom.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/dev/usb/serial/uchcom.c b/sys/dev/usb/serial/uchcom.c index 30084c448b4a..f8c6b52829bd 100644 --- a/sys/dev/usb/serial/uchcom.c +++ b/sys/dev/usb/serial/uchcom.c @@ -618,8 +618,12 @@ uchcom_set_baudrate(struct uchcom_softc *sc, uint32_t rate) if (uchcom_calc_divider_settings(&dv, rate)) return; + /* + * According to linux code we need to set bit 7 of UCHCOM_REG_BPS_PRE, + * otherwise the chip will buffer data. + */ uchcom_write_reg(sc, - UCHCOM_REG_BPS_PRE, dv.dv_prescaler, + UCHCOM_REG_BPS_PRE, dv.dv_prescaler | 0x80, UCHCOM_REG_BPS_DIV, dv.dv_div); uchcom_write_reg(sc, UCHCOM_REG_BPS_MOD, dv.dv_mod, |