Re: [PATCH v5 2/3] arm64: dts: qcom: Introduce sa8255p SoC

[Deepti Jaggi <deepti.jaggi@oss.qualcomm.com>]

On 3/11/2026 6:31 AM, Bartosz Golaszewski wrote:
> On Thu, 5 Mar 2026 05:28:29 +0100, Deepti Jaggi
> <deepti.jaggi@oss.qualcomm.com> said:
>> From: Nikunj Kela <quic_nkela@quicinc.com>
>>
>> Introduce base device tree support for sa8255p Qualcomm's automotive
>> infotainment SoC. The base dt file describes core SoC components- CPUs,
>> CPU map, ipcc, QUP,  geni UART, interrupt controller, TLMM, reserved
>> memory, SMMU, firmware scm, scmi, watchdog, SRAM, PSCI, ufs, pcie, pmu
>> nodes and enable booting to shell with ramdisk.
>>
>> The Qualcomm automotive sa8255p SoC 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 LinaroConnect 2024.[1]
>>
>> Limit initial support to basic platform resources, serial console, ufs
>> and pcie.Defer enabling USB, and Ethernet to subsequent updates.
>>
>> [1]: https://resources.linaro.org/en/resource/wfnfEwBhRjLV1PEAJoDDte
>>
>> Co-developed-by: Shazad Hussain <shazad.hussain@oss.qualcomm.com>
>> Signed-off-by: Shazad Hussain <shazad.hussain@oss.qualcomm.com>
>> Signed-off-by: Nikunj Kela <quic_nkela@quicinc.com>
>> Co-developed-by: Deepti Jaggi <deepti.jaggi@oss.qualcomm.com>
>> Signed-off-by: Deepti Jaggi <deepti.jaggi@oss.qualcomm.com>
>> ---
> Just some nits, looks good to me.

Thanks for reviewing the series.

>
>>  arch/arm64/boot/dts/qcom/sa8255p.dtsi | 4861 +++++++++++++++++++++++++++++++++
>>  1 file changed, 4861 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sa8255p.dtsi b/arch/arm64/boot/dts/qcom/sa8255p.dtsi
>> new file mode 100644
>> index 000000000000..4f8529db70f6
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/qcom/sa8255p.dtsi
>> @@ -0,0 +1,4861 @@
>> +// SPDX-License-Identifier: BSD-3-Clause
>> +/*
>> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
>> + */
>> +
>> +#include <dt-bindings/interrupt-controller/arm-gic.h>
>> +#include <dt-bindings/mailbox/qcom-ipcc.h>
>> +
>> +/ {
>> +	interrupt-parent = <&intc>;
>> +
>> +	#address-cells = <2>;
>> +	#size-cells = <2>;
>> +
>> +	clocks {
> Stray newline.

Ack

>> +
>> +		bi_tcxo_div2: bi-tcxo-div2-clk {
>> +			compatible = "fixed-factor-clock";
>> +			clocks = <&xo_board_clk>;
>> +			clock-mult = <1>;
>> +			clock-div = <2>;
>> +			#clock-cells = <0>;
>> +		};
>> +
>> +
> [snip]
>
>> +	firmware: firmware {
> You never use this label.

Ack, will drop the label 

> [snip]
>
> Stray newline? Same elsewhere.

Ack , will fix all the stray newlines.

>
> With that:
>
> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Thanks,
Deepti