----- Original Message ----- > On 06/16/2017 09:13 AM, Hans de Goede wrote: > > Hi All, > > > > For the last couple of months I've been working on improving Linux > > support for Intel Bay and Cherry Trail devices as a spare-time project. > > > > A lot of my changes for this have landed in the 4.12 kernel, see: > > http://hansdegoede.livejournal.com/ > > > > The proposed config changes enable various drivers to make these > > improvements available for Fedora users. > > > > Most of these changes just enable modules, but there is one change > > which also impacts non Bay and Cherry Trail x86_64 users, the proposed > > changes also change the I2C_DESIGNWARE controller options from module > > to built-in. This is necessary because Bay and Cherry Trail devices use > > an i2c attached PMIC which provides an ACPI OpRegion and this OpRegion > > must be available before any devices with _PS0 or _PS3 methods which > > use this OpRegion get their drivers bound to them. > > > > I'm not expecting any side-effects from this change, but I wanted > > to point this out just in case. > > > > I thought there had previously been discussion about why we can't > have it built in but I have been unable to produce any evidence that > such a conversation ever existed. I might be confusing it with another > subsystem (GPIO?). That's probably a discussion with me. I think it was for the Surface 3 battery support which needed: CONFIG_I2C_DESIGNWARE_CORE=y CONFIG_I2C_DESIGNWARE_PLATFORM=y From: https://bugzilla.kernel.org/show_bug.cgi?id=106231#c39 Benjamin would know more. And possibly also: +CONFIG_PWM_CRC=y from commit fcb14e5f56b3d8daea308233b799d419cc02fd95 (and d775331d9cc6659c6e91a6991c640e6abb049243) which is needed to get the backlight working on the Surface 3 (and possibly other BayTrail/CherryTrail devices) _______________________________________________ kernel mailing list -- kernel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to kernel-leave@xxxxxxxxxxxxxxxxxxxxxxx
