Subject: [PATCH v2 2/4] arm64: add basic DTS for i.MX8MQ

From: [email-masked] (Shawn Guo)
Date: Mon, 5 Feb 2018 16:45:06 +0800

On Fri, Feb 02, 2018 at 08:13:56AM +0000, Jacky Bai wrote:
> > Subject: [PATCH v2 2/4] arm64: add basic DTS for i.MX8MQ
> > 
> > This adds the basic DTS for the i.MX8MQ.
> > For now only the following peripherals are supported:
> > - IOMUXC (pin controller)
> > - CCM (clock controller)
> > - GPIO
> > - UART
> > - uSDHC (SD/eMMC controller)
> > - FEC (ethernet controller)
> > - i2c
> > 
> > This is enough to get a very basic board support up and running.
> > 
> > One known limitation is that the driver for the GPC interrupt
> > controller is still missing, rendering the CPU sleep states unusable
> > as there is nothing waking them up anymore. This will be fixed in
> > due course.
> > 
> 
> The cpu sleep states can NOT be supported in community kernel due to hardware limitation.

Jacky,

Can you elaborate your comment a bit?  If it's a hardware limitation, I
guess not only community but also vendor kernel has no way to support
sleep states, right?

Shawn