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Message-ID: <ec664db0-ae0f-5046-25c4-315d0a2c8a3f@quicinc.com>
Date:   Tue, 30 May 2023 17:10:31 +0530
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Subject: Re: [PATCH 5/8] arm64: dts: qcom: Add SDX75 platform and IDP board
 support
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To:     Konrad Dybcio <konrad.dybcio@linaro.org>, <agross@kernel.org>,
        <andersson@kernel.org>, <robh+dt@kernel.org>,
        <krzysztof.kozlowski+dt@linaro.org>, <conor+dt@kernel.org>,
        <tglx@linutronix.de>, <maz@kernel.org>, <will@kernel.org>,
        <robin.murphy@arm.com>, <joro@8bytes.org>, <robimarko@gmail.com>,
        <quic_gurus@quicinc.com>
CC:     <linux-arm-msm@vger.kernel.org>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>, <iommu@lists.linux.dev>
References: <1684487350-30476-1-git-send-email-quic_rohiagar@quicinc.com>
 <1684487350-30476-6-git-send-email-quic_rohiagar@quicinc.com>
 <405186ab-46df-fcf1-2894-a08c4b42c069@linaro.org>
From:   Rohit Agarwal <quic_rohiagar@quicinc.com>
In-Reply-To: <405186ab-46df-fcf1-2894-a08c4b42c069@linaro.org>
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Thanks for reviewing. Sorry for the late reply was on leave.

On 5/19/2023 10:58 PM, Konrad Dybcio wrote:
>
> On 19.05.2023 11:09, Rohit Agarwal wrote:
>> Add basic devicetree support for SDX75 platform and IDP board from
>> Qualcomm. The SDX75 platform features an ARM Cortex A55 CPU which forms
>> the Application Processor Sub System (APSS) along with standard Qualcomm
>> peripherals like GCC, TLMM, UART, QPIC, and BAM etc... Also, there
>> exists the networking parts such as IPA, MHI, PCIE-EP, EMAC, and Modem
>> etc..
>>
>> This commit adds basic devicetree support.
>>
>> Signed-off-by: Rohit Agarwal <quic_rohiagar@quicinc.com>
>> ---
>>   arch/arm64/boot/dts/qcom/Makefile      |   1 +
>>   arch/arm64/boot/dts/qcom/sdx75-idp.dts |  19 ++
>>   arch/arm64/boot/dts/qcom/sdx75.dtsi    | 534 +++++++++++++++++++++++++++++++++
>>   3 files changed, 554 insertions(+)
>>   create mode 100644 arch/arm64/boot/dts/qcom/sdx75-idp.dts
>>   create mode 100644 arch/arm64/boot/dts/qcom/sdx75.dtsi
>>
>> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
>> index d42c595..4fd5a18 100644
>> --- a/arch/arm64/boot/dts/qcom/Makefile
>> +++ b/arch/arm64/boot/dts/qcom/Makefile
>> @@ -173,6 +173,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-xiaomi-polaris.dtb
>>   dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-shift-axolotl.dtb
>>   dtb-$(CONFIG_ARCH_QCOM)	+= sdm850-lenovo-yoga-c630.dtb
>>   dtb-$(CONFIG_ARCH_QCOM)	+= sdm850-samsung-w737.dtb
>> +dtb-$(CONFIG_ARCH_QCOM)	+= sdx75-idp.dtb
>>   dtb-$(CONFIG_ARCH_QCOM)	+= sm4250-oneplus-billie2.dtb
>>   dtb-$(CONFIG_ARCH_QCOM)	+= sm6115p-lenovo-j606f.dtb
>>   dtb-$(CONFIG_ARCH_QCOM)	+= sm6125-sony-xperia-seine-pdx201.dtb
>> diff --git a/arch/arm64/boot/dts/qcom/sdx75-idp.dts b/arch/arm64/boot/dts/qcom/sdx75-idp.dts
>> new file mode 100644
>> index 0000000..e2e803b
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/qcom/sdx75-idp.dts
>> @@ -0,0 +1,19 @@
>> +// SPDX-License-Identifier: BSD-3-Clause
>> +/*
>> + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
>> + */
>> +
>> +/dts-v1/;
>> +
>> +#include "sdx75.dtsi"
>> +
>> +/ {
>> +	model = "Qualcomm Technologies, Inc. SDX75 IDP";
>> +	compatible = "qcom,sdx75-idp", "qcom,sdx75";
>> +	qcom,board-id = <0x2010022 0x302>;
> You should be able to get by without qcom,{msm,board}-id.
Actually the bootloader requires the msm and board id. Shouldn't this 
become a necessary field then?
>
>> +
>> +};
>> +
>> +&tlmm {
>> +	gpio-reserved-ranges = <110 6>;
>> +};
>> diff --git a/arch/arm64/boot/dts/qcom/sdx75.dtsi b/arch/arm64/boot/dts/qcom/sdx75.dtsi
>> new file mode 100644
>> index 0000000..c2b8810
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/qcom/sdx75.dtsi
>> @@ -0,0 +1,534 @@
>> +// SPDX-License-Identifier: BSD-3-Clause
>> +/*
>> + * SDX75 SoC device tree source
>> + *
>> + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
>> + *
>> + */
>> +
>> +#include <dt-bindings/clock/qcom,rpmh.h>
>> +#include <dt-bindings/interrupt-controller/arm-gic.h>
>> +#include <dt-bindings/soc/qcom,rpmh-rsc.h>
>> +
>> +/ {
>> +	#address-cells = <2>;
>> +	#size-cells = <2>;
>> +	qcom,msm-id = <556 0x10000>;
>> +	interrupt-parent = <&intc>;
>> +
>> +	chosen: chosen { };
>> +
>> +	memory {
> The memory node should have a unit address.
Sure will update this.
>
>> +		device_type = "memory";
>> +		reg = <0 0 0 0>;
>> +	};
>> +
>> +	clocks { };
>> +
>> +	cpus {
>> +		#address-cells = <2>;
>> +		#size-cells = <0>;
>> +
> [...]
>
>> +
>> +		CLUSTER_PD: power-domain-cpu-cluster0 {
>> +			#power-domain-cells = <0>;
>> +			domain-idle-states = <&CLUSTER_SLEEP_0 &CX_RET &CLUSTER_SLEEP_1>;
> Is CLUSTER_SLEEP_1 deeper than CX retention?
Yes
>
>> +		};
>> +	};
>> +
>> +	firmware {
>> +		scm: scm {
>> +			compatible = "qcom,scm-sdx75", "qcom,scm";
>> +		};
>> +	};
>> +
>> +	pmu {
>> +		compatible = "arm,armv8-pmuv3";
>> +		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_HIGH>;
>> +	};
>> +
>> +	reserved-memory {
>> +		#address-cells = <2>;
>> +		#size-cells = <2>;
>> +		ranges;
>> +
>> +		gunyah_hyp_mem: memory@80000000 {
> reserved memory subnodes should have meaningful node names, e.g.
>
> hypervisor@800...
Will update this.
>
>> +			reg = <0x0 0x80000000 0x0 0x800000>;
>> +			no-map;
>> +		};
>> +
> [...]
>
>> +
>> +	smem: qcom,smem {
>> +		compatible = "qcom,smem";
>> +		memory-region = <&smem_mem>;
>> +		hwlocks = <&tcsr_mutex 3>;
>> +	};
>> +
>> +	soc: soc {
>> +		#address-cells = <2>;
>> +		#size-cells = <2>;
>> +		ranges;
> Are the SoC buses limited to 32b addresses?
No, Will fix this in the next.
>
>> +		compatible = "simple-bus";
> Compatible should go first.
Yes, Ok.
>> +
>> +		tcsr_mutex: hwlock@1f40000 {
>> +			compatible = "qcom,tcsr-mutex";
>> +			reg = <0x0 0x01f40000 0x0 0x40000>;
>> +			#hwlock-cells = <1>;
>> +		};
>> +
>> +		pdc: interrupt-controller@b220000 {
>> +			compatible = "qcom,sdx75-pdc", "qcom,pdc";
>> +			reg = <0x0 0xb220000 0x0 0x30000>,
>> +			      <0x0 0x174000f0 0x0 0x64>;
>> +			qcom,pdc-ranges = <0 147 52>,
>> +					  <52 266 32>,
>> +					  <84 500 59>;
>> +			#interrupt-cells = <2>;
>> +			interrupt-parent = <&intc>;
>> +			interrupt-controller;
>> +		};
>> +
>> +		tlmm: pinctrl@f000000 {
>> +			compatible = "qcom,sdx75-tlmm";
>> +			reg = <0x0 0x0f000000 0x0 0x400000>;
>> +			interrupts = <GIC_SPI 212 IRQ_TYPE_LEVEL_HIGH>;
>> +			gpio-controller;
>> +			#gpio-cells = <2>;
>> +			gpio-ranges = <&tlmm 0 0 133>;
>> +			interrupt-controller;
>> +			#interrupt-cells = <2>;
>> +			wakeup-parent = <&pdc>;
>> +		};
>> +
>> +		apps_smmu: iommu@15000000 {
>> +			compatible = "qcom,sdx75-smmu-500", "arm,mmu-500";
>> +			reg = <0x0 0x15000000 0x0 0x40000>;
>> +			#iommu-cells = <2>;
>> +			#global-interrupts = <2>;
>> +			interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 99 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 104 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 105 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 106 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 107 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 298 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 299 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 300 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 301 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 302 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 303 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 304 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 305 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 306 IRQ_TYPE_LEVEL_HIGH>;
> Many newer SoCs have dma-coherent SMMUs. Is this the case here?
Yes, Will add the dma-coherent property here.
>
>> +		};
>> +
>> +		intc: interrupt-controller@17200000 {
>> +			compatible = "arm,gic-v3";
>> +			#interrupt-cells = <3>;
>> +			interrupt-controller;
>> +			#redistributor-regions = <1>;
>> +			redistributor-stride = <0x0 0x20000>;
>> +			reg = <0x0 0x17200000 0x0 0x10000>,
>> +			      <0x0 0x17260000 0x0 0x80000>;
>> +			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
>> +		};
>> +
>> +		timer@17420000 {
>> +			compatible = "arm,armv7-timer-mem";
>> +			#address-cells = <2>;
>> +			#size-cells = <2>;
>> +			ranges;
>> +			reg = <0x0 0x17420000 0x0 0x1000>;
>> +			clock-frequency = <19200000>;
> clock-frequency is discouraged, unless strictly necessary.
>
> Since gh is running, the timer is already programmed so it should be
> fine to drop this.
>
> [...]
>
>> +	timer {
>> +		compatible = "arm,armv8-timer";
>> +		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_LOW)>,
>> +			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_LOW)>,
>> +			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_LOW)>,
>> +			     <GIC_PPI 12 (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_LOW)>;
>> +		clock-frequency = <19200000>;
> Ditto
Ok Thanks for the info. Dropping the clock frequency property in the 
next version.

Thanks,
Rohit.
>
> Konrad
>> +	};
>> +};