linux-kernel - Re: [PATCH] arm64: dts: qcom: sc7280: Add PMIC peripherals for SC7280

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Date:   Fri, 12 Mar 2021 11:36:45 -0600
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     satya priya <skakit@...eaurora.org>
Cc:     Rob Herring <robh+dt@...nel.org>, Andy Gross <agross@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, kgunda@...eaurora.org
Subject: Re: [PATCH] arm64: dts: qcom: sc7280: Add PMIC peripherals for SC7280

On Thu 11 Mar 04:40 CST 2021, satya priya wrote:

> Add PM7325/PM8350C/PMK8350/PMR735A peripherals such as PON,
> GPIOs, RTC and other PMIC infra modules for SC7280.
> 

Overall this looks good, just two small things below.

> Signed-off-by: satya priya <skakit@...eaurora.org>
> ---
> This patch depends on base DT and board files for SC7280 to merge first
> https://lore.kernel.org/patchwork/project/lkml/list/?series=487403
> 
>  arch/arm64/boot/dts/qcom/pm7325.dtsi  |  60 ++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/pm8350c.dtsi |  60 ++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/pmk8350.dtsi | 104 ++++++++++++++++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/pmr735a.dtsi |  60 ++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/sc7280.dtsi  |   8 +++
>  5 files changed, 292 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/qcom/pm7325.dtsi
>  create mode 100644 arch/arm64/boot/dts/qcom/pm8350c.dtsi
>  create mode 100644 arch/arm64/boot/dts/qcom/pmk8350.dtsi
>  create mode 100644 arch/arm64/boot/dts/qcom/pmr735a.dtsi
> 
> diff --git a/arch/arm64/boot/dts/qcom/pm7325.dtsi b/arch/arm64/boot/dts/qcom/pm7325.dtsi
> new file mode 100644
> index 0000000..393b256
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/pm7325.dtsi
> @@ -0,0 +1,60 @@
> +// SPDX-License-Identifier: BSD-3-Clause
> +// Copyright (c) 2021, The Linux Foundation. All rights reserved.
> +
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/spmi/spmi.h>
> +
> +&spmi_bus {
> +	pm7325: pmic@1 {
> +		compatible = "qcom,pm7325", "qcom,spmi-pmic";
> +		reg = <0x1 SPMI_USID>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		pm7325_tz: temp-alarm@a00 {
> +			compatible = "qcom,spmi-temp-alarm";
> +			reg = <0xa00>;
> +			interrupts = <0x1 0xa 0x0 IRQ_TYPE_EDGE_BOTH>;
> +			#thermal-sensor-cells = <0>;
> +		};
> +
> +		pm7325_gpios: gpios@...0 {
> +			compatible = "qcom,pm7325-gpio", "qcom,spmi-gpio";
> +			reg = <0x8800>;
> +			gpio-controller;
> +			gpio-ranges = <&pm7325_gpios 0 0 10>;
> +			#gpio-cells = <2>;
> +			interrupt-controller;
> +			#interrupt-cells = <2>;
> +		};
> +	};
> +};
> +
> +&thermal_zones {
> +	pm7325_temp_alarm: pm7325_tz {

'_' is not allowed to be used in node names, there's a few of these
sprinkled through the patch. Please replace them with '-'.

> +		polling-delay-passive = <100>;
> +		polling-delay = <0>;
> +		thermal-governor = "step_wise";
> +		thermal-sensors = <&pm7325_tz>;
> +
> +		trips {
> +			pm7325_trip0: trip0 {
> +				temperature = <95000>;
> +				hysteresis = <0>;
> +				type = "passive";
> +			};
> +
> +			pm7325_trip1: trip1 {
> +				temperature = <115000>;
> +				hysteresis = <0>;
> +				type = "critical";
> +			};
> +
> +			pm7325_trip2: trip2 {
> +				temperature = <145000>;
> +				hysteresis = <0>;
> +				type = "critical";
> +			};
> +		};
> +	};
> +};
[..]
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index 8af6d77..25402d4 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -606,4 +606,12 @@
>  			     <GIC_PPI 11 IRQ_TYPE_LEVEL_LOW>,
>  			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>;
>  	};
> +
> +	thermal_zones: thermal-zones {
> +	};
>  };
> +
> +#include "pm7325.dtsi"
> +#include "pm8350c.dtsi"
> +#include "pmk8350.dtsi"
> +#include "pmr735a.dtsi"

Is there any particular reason for you including these at the end of
sc7270.dtsi, rather than the top like we do in other platforms?

Also, are all SC7280 devices always coming with this quartet? We've seen
variations of this in the past and therefor typically include them from
the board dts instead.

Regards,
Bjorn