Date: Mon, 25 Jun 2018 08:50:06 +0000 (UTC) From: Andriy Gapon <avg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r335620 - stable/11/sys/dev/usb/serial Message-ID: <201806250850.w5P8o6Va041316@repo.freebsd.org>
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Author: avg Date: Mon Jun 25 08:50:06 2018 New Revision: 335620 URL: https://svnweb.freebsd.org/changeset/base/335620 Log: MFC r333999: uchcom: add a hardware configuration tweak seen in Linux code Modified: stable/11/sys/dev/usb/serial/uchcom.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/dev/usb/serial/uchcom.c ============================================================================== --- stable/11/sys/dev/usb/serial/uchcom.c Mon Jun 25 08:49:13 2018 (r335619) +++ stable/11/sys/dev/usb/serial/uchcom.c Mon Jun 25 08:50:06 2018 (r335620) @@ -616,8 +616,12 @@ uchcom_set_baudrate(struct uchcom_softc *sc, uint32_t 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,
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