Hi Carlo On Tue, Mar 1, 2016 at 2:04 PM, Carlo Caione <carlo@xxxxxxxxxx> wrote: > From: Carlo Caione <carlo@xxxxxxxxxxxx> > > In the Amlogic Meson8 / Meson8b platforms we have two different buses: > cbus and aobus, corresponding to 2 different power domains (regular and > always-on). On each bus a different set of registers is mapped to manage > muxes, GPIOs and in general to control a clear subset of the pins. > > Considering this architecture, having two different pinctrl devices, one > for each bus / power domain, makes much more sense than just having one > single device. > > Right now we have one single pin controller driver that uses two > different domains (represented by 'gpio' and 'gpio-ao' sub-nodes in the > DTS) to manage the set of registers on the two buses. This dual-domain > configuration is hardcoded into the driver that strictly requires one > domain for each bus in the same pin controller device. > > With this patch we refactor the driver to allow splitting the driver in > two parts. This change is needed to have a proper description of the HW > in the device-tree where we want to introduce aobus and cbus. > > Signed-off-by: Carlo Caione <carlo@xxxxxxxxxxxx> kernelci.org detected that the meson8b-odroidc1 started failing boot test in mainline[1] and I bisected it down to this patch, which is in mainline in he form of commit 9dab1868ec0d (pinctrl: amlogic: Make driver independent from two-domain configuration.) I confirmed that reverting this patch on top of Linus' master branch (commit 9256d5a308c9) gets the odroid-c1 booting again. Kevin [1] https://kernelci.org/boot/meson8b-odroidc1/job/mainline/kernel/v4.5-1127-g9256d5a308c9/defconfig/multi_v7_defconfig/lab/lab-khilman/?_id=56e9af2359b5146a7a791516 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
