Date: Thu, 30 Jul 2020 14:01:54 +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-12@freebsd.org Subject: svn commit: r363696 - stable/12/sys/dev/gpio Message-ID: <202007301401.06UE1sXj034017@repo.freebsd.org>
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Author: avg Date: Thu Jul 30 14:01:54 2020 New Revision: 363696 URL: https://svnweb.freebsd.org/changeset/base/363696 Log: MFC r363382: gpioiic: never drive lines active high Few drivers support GPIO_PIN_OPENDRAIN. Modified: stable/12/sys/dev/gpio/gpioiic.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/dev/gpio/gpioiic.c ============================================================================== --- stable/12/sys/dev/gpio/gpioiic.c Thu Jul 30 13:56:45 2020 (r363695) +++ stable/12/sys/dev/gpio/gpioiic.c Thu Jul 30 14:01:54 2020 (r363696) @@ -191,16 +191,14 @@ static void gpioiic_setsda(device_t dev, int val) { struct gpioiic_softc *sc = device_get_softc(dev); - int err; - /* - * Some controllers cannot set an output value while a pin is in input - * mode; in that case we set the pin again after changing mode. - */ - err = gpio_pin_set_active(sc->sdapin, val); - gpio_pin_setflags(sc->sdapin, GPIO_PIN_OUTPUT | GPIO_PIN_OPENDRAIN); - if (err != 0) - gpio_pin_set_active(sc->sdapin, val); + if (val) { + gpio_pin_setflags(sc->sdapin, GPIO_PIN_INPUT); + } else { + gpio_pin_setflags(sc->sdapin, + GPIO_PIN_OUTPUT | GPIO_PIN_OPENDRAIN); + gpio_pin_set_active(sc->sdapin, 0); + } } static void @@ -208,8 +206,13 @@ gpioiic_setscl(device_t dev, int val) { struct gpioiic_softc *sc = device_get_softc(dev); - gpio_pin_setflags(sc->sclpin, GPIO_PIN_OUTPUT | GPIO_PIN_OPENDRAIN); - gpio_pin_set_active(sc->sclpin, val); + if (val) { + gpio_pin_setflags(sc->sclpin, GPIO_PIN_INPUT); + } else { + gpio_pin_setflags(sc->sclpin, + GPIO_PIN_OUTPUT | GPIO_PIN_OPENDRAIN); + gpio_pin_set_active(sc->sclpin, 0); + } } static int
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