Hi Alexandru On Tue, Oct 20, 2020 at 05:14:58PM -0500, Alexandru Gagniuc wrote: > On the SII9022, the IOVCC and CVCC12 supplies must reach the correct > voltage before the reset sequence is initiated. On most boards, this > assumption is true at boot-up, so initialization succeeds. > > However, when we try to initialize the chip with incorrect supply > voltages, it will not respond to I2C requests. sii902x_probe() fails > with -ENXIO. > > To resolve this, look for the "iovcc" and "cvcc12" regulators, and > make sure they are enabled before starting the reset sequence. If > these supplies are not available in devicetree, then they will default > to dummy-regulator. In that case everything will work like before. > > This was observed on a STM32MP157C-DK2 booting in u-boot falcon mode. > On this board, the supplies would be set by the second stage > bootloader, which does not run in falcon mode. > > Signed-off-by: Alexandru Gagniuc <mr.nuke.me@xxxxxxxxx> Thanks, applied series to drm-misc-next. I fixed two checkpatch --strict warnings while applying. Sam _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
