From c508b0818b245ea136d6538d68868cb3541f8f8f Mon Sep 17 00:00:00 2001 From: Vladimir Kondratyev Date: Wed, 1 Dec 2021 00:29:50 +0300 Subject: [PATCH] iichid(4): Perform acknowledgement of I2C device interrupt after RESET command in sampling mode to workaround firmware bug. This fixes reboot or poweroff on frame.work laptops after first touch. Reported by: many PR: 259230 MFC after: 1 week Tested by: kevans, markj --- sys/dev/iicbus/iichid.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/sys/dev/iicbus/iichid.c b/sys/dev/iicbus/iichid.c index d95ffb8add8..a36ed9bb853 100644 --- a/sys/dev/iicbus/iichid.c +++ b/sys/dev/iicbus/iichid.c @@ -1134,6 +1134,11 @@ iichid_attach(device_t dev) &sc->sampling_hysteresis, 0, "number of missing samples before enabling of slow mode"); hid_add_dynamic_quirk(&sc->hw, HQ_IICHID_SAMPLING); + + if (sc->sampling_rate_slow >= 0) { + pause("iichid", (hz + 999) / 1000); + (void)iichid_cmd_read(sc, NULL, 0, NULL); + } #endif /* IICHID_SAMPLING */ child = device_add_child(dev, "hidbus", -1); -- 2.45.2