linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: ipq9574: add support for RDP454 variant

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Message-ID: <408e5161-f290-68a6-048c-472a2b34a587@quicinc.com>
Date:   Mon, 29 May 2023 16:55:49 +0530
From:   POOVENDHAN SELVARAJ <quic_poovendh@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>, <agross@...nel.org>,
        <andersson@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <quic_srichara@...cinc.com>, <quic_gokulsri@...cinc.com>,
        <quic_sjaganat@...cinc.com>, <quic_kathirav@...cinc.com>,
        <quic_arajkuma@...cinc.com>, <quic_anusha@...cinc.com>,
        <quic_devipriy@...cinc.com>
Subject: Re: [PATCH 2/2] arm64: dts: qcom: ipq9574: add support for RDP454
 variant


On 5/19/2023 11:01 PM, Konrad Dybcio wrote:
>
> On 19.05.2023 12:31, Poovendhan Selvaraj wrote:
>> From: POOVENDHAN SELVARAJ <quic_poovendh@...cinc.com>
>>
>> Add the initial device tree support for the Reference Design Platform (RDP)
>> 454 based on IPQ9574 family of SoCs. This patch adds support for Console
>> UART, SPI NOR and SMPA1 regulator node.
>>
>> Signed-off-by: Poovendhan Selvaraj <quic_poovendh@...cinc.com>
>> ---
>>   arch/arm64/boot/dts/qcom/Makefile           |  1 +
>>   arch/arm64/boot/dts/qcom/ipq9574-rdp454.dts | 92 +++++++++++++++++++++
>>   2 files changed, 93 insertions(+)
>>   create mode 100644 arch/arm64/boot/dts/qcom/ipq9574-rdp454.dts
>>
>> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
>> index 7b5466395f46..834e790bec90 100644
>> --- a/arch/arm64/boot/dts/qcom/Makefile
>> +++ b/arch/arm64/boot/dts/qcom/Makefile
>> @@ -12,6 +12,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= ipq8074-hk10-c2.dtb
>>   dtb-$(CONFIG_ARCH_QCOM)	+= ipq9574-rdp418.dtb
>>   dtb-$(CONFIG_ARCH_QCOM)	+= ipq9574-rdp433.dtb
>>   dtb-$(CONFIG_ARCH_QCOM)	+= ipq9574-rdp449.dtb
>> +dtb-$(CONFIG_ARCH_QCOM)	+= ipq9574-rdp454.dtb
>>   dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-acer-a1-724.dtb
>>   dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-alcatel-idol347.dtb
>>   dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-asus-z00l.dtb
>> diff --git a/arch/arm64/boot/dts/qcom/ipq9574-rdp454.dts b/arch/arm64/boot/dts/qcom/ipq9574-rdp454.dts
>> new file mode 100644
>> index 000000000000..b3e853a9cc94
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/qcom/ipq9574-rdp454.dts
>> @@ -0,0 +1,92 @@
>> +// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
>> +/*
>> + * IPQ9574 RDP454 board device tree source
>> + *
>> + * Copyright (c) 2020-2021 The Linux Foundation. All rights reserved.
>> + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved.
>> + */
>> +
>> +/dts-v1/;
>> +
>> +#include "ipq9574.dtsi"
>> +
>> +/ {
>> +	model = "Qualcomm Technologies, Inc. IPQ9574/AP-AL02-C9";
>> +	compatible = "qcom,ipq9574-ap-al02-c9", "qcom,ipq9574";
>> +
>> +	aliases {
>> +		serial0 = &blsp1_uart2;
>> +	};
>> +
>> +	chosen {
>> +		stdout-path = "serial0:115200n8";
>> +	};
>> +};
>> +
>> +/* In AL02-C9, the max supported CPU Freq is 1.5 GHz. Disabling frequencies beyond 1.5GHz*/
> In -> On
>
> GHz*/ -> GHz */
>
> Disabling -> Disable
Okay. Will address them in next spin
>
> Can this not be determined based on fuse values?

Yes...That should be possible.Will then drop the below cpu_opp_table 
entries and post a separate series for the same.

>
>> +&cpu_opp_table {
>> +	opp-1800000000 {
>> +		opp-supported-hw = <0>;
>> +	};
>> +
>> +	opp-2208000000 {
>> +		opp-supported-hw = <0>;
>> +	};
>> +};
>> +
>> +/* Disable IPQ9574 integrated radio's reserved memory */
> ?
>
> Konrad

sorry, will drop it as it got added by mistake.

Regards,
Poovendhan S

>> +&blsp1_spi0 {
>> +	pinctrl-0 = <&spi_0_pins>;
>> +	pinctrl-names = "default";
>> +	status = "okay";
>> +
>> +	flash@0 {
>> +		compatible = "micron,n25q128a11", "jedec,spi-nor";
>> +		reg = <0>;
>> +		#address-cells = <1>;
>> +		#size-cells = <1>;
>> +		spi-max-frequency = <50000000>;
>> +	};
>> +};
>> +
>> +&blsp1_uart2 {
>> +	pinctrl-0 = <&uart2_pins>;
>> +	pinctrl-names = "default";
>> +	status = "okay";
>> +};
>> +
>> +&rpm_requests {
>> +	regulators {
>> +		compatible = "qcom,rpm-mp5496-regulators";
>> +
>> +		ipq9574_s1: s1 {
>> +		/*
>> +		 * During kernel bootup, the SoC runs at 800MHz with 875mV set by the bootloaders.
>> +		 * During regulator registration, kernel not knowing the initial voltage,
>> +		 * considers it as zero and brings up the regulators with minimum supported voltage.
>> +		 * Update the regulator-min-microvolt with SVS voltage of 725mV so that
>> +		 * the regulators are brought up with 725mV which is sufficient for all the
>> +		 * corner parts to operate at 800MHz
>> +		 */
>> +			regulator-min-microvolt = <725000>;
>> +			regulator-max-microvolt = <1075000>;
>> +		};
>> +	};
>> +};
>> +
>> +&sleep_clk {
>> +	clock-frequency = <32000>;
>> +};
>> +
>> +&tlmm {
>> +	spi_0_pins: spi-0-state {
>> +		pins = "gpio11", "gpio12", "gpio13", "gpio14";
>> +		function = "blsp0_spi";
>> +		drive-strength = <8>;
>> +		bias-disable;
>> +	};
>> +};
>> +
>> +&xo_board_clk {
>> +	clock-frequency = <24000000>;
>> +};