Re: [PATCH v2 5/7] arm64: dts: qcom: Add device tree for Lemans GearVM variant

[Shawn Guo]

On Wed, Oct 21, 2026 at 02:17:40PM +0530, Shazad Hussain wrote:
> Hi Shawn,
> 
> On 10/15/2026 8:07 AM, Shawn Guo wrote:
> > Add lemans-gearvm.dtsi for Lemans GearVM variant (SA8255P) that utilizes
> > firmware to configure platform resources such as clocks, interconnects
> > and TLMM.
> > Device drivers request these resources through the SCMI power, reset and
> > performance protocols.  Assign each device driver a dedicated SCMI
> > channel and Tx/Rx doorbells to support parallel resource requests and
> > aggregation in the SCMI platform server.  Operate the SCMI server stack
> > in an SMP-enabled VM using the Qualcomm SMC/HVC transport driver for
> > communication.
> > 
> > Group resource operations to improve abstraction and reduce the number of
> > SCMI requests.  Follow the SCMI-based resource management approach
> > demonstrated by Qualcomm at Linaro Connect 2024 [1].
> > 
> > [1] https://resources.linaro.org/en/resource/wfnfEwBhRjLV1PEAJoDDte
> > 
> > Co-developed-by: Shazad Hussain <shazad.hussain@xxxxxxxxxxxxxxxx>
> > Signed-off-by: Shazad Hussain <shazad.hussain@xxxxxxxxxxxxxxxx>
> > Signed-off-by: Nikunj Kela <quic_nkela@xxxxxxxxxxx>
> > Co-developed-by: Deepti Jaggi <deepti.jaggi@xxxxxxxxxxxxxxxx>
> > Signed-off-by: Deepti Jaggi <deepti.jaggi@xxxxxxxxxxxxxxxx>
> > Signed-off-by: Shawn Guo <shengchao.guo@xxxxxxxxxxxxxxxx>

[...]

> > +&qupv3_id_0 {
> > +	compatible = "qcom,sa8255p-geni-se-qup";
> > +
> > +	i2c0: i2c@980000 {
> > +		compatible = "qcom,sa8255p-geni-i2c";
> > +		power-domains = <&scmi11_pd 0>,
> > +				<&scmi11_dvfs 0>;
> 
> For I2C power domain should be scmi9_pd and all below I2C's.
> 
> > +		power-domain-names = "power",
> > +				     "perf";
> > +	};
> > +
> > +	spi0: spi@980000 {
> > +		compatible = "qcom,sa8255p-geni-spi";
> > +		power-domains = <&scmi11_pd 0>,
> > +				<&scmi11_dvfs 0>;
> 
> 
> For SPI power domain should be scmi10_pd and all below SPI's.

Thanks for pointing these out, Shazad! I will fix in v3.

Shawn

> 
> > +		power-domain-names = "power",
> > +				     "perf";
> > +	};