Re: [PATCH v3 3/8] arm64: dts: ls1028a: add flextimer based pwm nodes

[Vladimir Oltean]

On Wed, Apr 13, 2022 at 06:07:20PM +0000, Leo Li wrote:
> > arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi:1210.21-1219.5: Warning
> > (unique_unit_address): /soc/pwm@2800000: duplicate unit-address (also
> > used in node /soc/timer@2800000)
> > arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi:1221.21-1230.5: Warning
> > (unique_unit_address): /soc/pwm@2810000: duplicate unit-address (also
> > used in node /soc/timer@2810000)
> 
> Well, this is similar situation as pcie.  The flextimer controller can
> be used as timer, PWM or alarm.  We have separate drivers and bindings
> for these modes which resulted in different nodes for the same
> controller.

I think the mfd framework can address the situation where multiple
drivers, with multiple functionalities, want access to the same memory
region?