On Mon, Jan 18, 2021 at 05:02:45PM +0100, Mauro Carvalho Chehab wrote:

Mark Brown [off-list ref] escreveu:

quoted

If for some reason the PMIC is sufficiently fragile to need a delay
between enables it's not clear why the driver is doing it before
enabling rather than after, presumably there's issues with the regulator
ramping up and stabalising its output 

I don't have any datasheets or documentation from this device, except for 
the Linaro's official driver for Kernel 4.9 (from where this driver
was originally ported), and a high-level documentation for this 
hardware at 96boards site, which doesn't cover any details.

This misses the point.  To repeat, if the driver is hard coding
a delay why is the driver doing this *before* rather than *after*
enabling?