linux-kernel - Re: [PATCH V2 1/5] arm64: dts: qcom: pm7325: Add PMIC peripherals for pm7325

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Date:   Fri, 2 Apr 2021 10:35:54 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     satya priya <skakit@...eaurora.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, kgunda@...eaurora.org
Subject: Re: [PATCH V2 1/5] arm64: dts: qcom: pm7325: Add PMIC peripherals
 for pm7325

On Thu, Apr 01, 2021 at 02:43:12PM +0530, satya priya wrote:

> subject: arm64: dts: qcom: pm7325: Add PMIC peripherals for pm7325

nit: maybe just 'arm64: dts: qcom: Add pm7325 support/.dtsi' or similar?

> Add temp-alarm and GPIO support for pm7325.

nit: it's more than that, you are adding the .dtsi for the PMIC itself.

> Signed-off-by: satya priya <skakit@...eaurora.org>
> ---
>  arch/arm64/boot/dts/qcom/pm7325.dtsi | 53 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 53 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/qcom/pm7325.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..1e0848a
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/pm7325.dtsi
> @@ -0,0 +1,53 @@
> +// 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";

I saw the patches that add the compatible strings for the GPIOs, but
can't find those that add the strings for the PMICs themselves. Could
you provide a link if they have been sent already?

> +		reg = <0x1 SPMI_USID>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		pm7325_temp_alarm: 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_thermal: pm7325-thermal {
> +		polling-delay-passive = <100>;
> +		polling-delay = <0>;
> +		thermal-sensors = <&pm7325_temp_alarm>;
> +
> +		trips {
> +			pm7325_trip0: trip0 {
> +				temperature = <95000>;
> +				hysteresis = <0>;
> +				type = "passive";
> +			};
> +
> +			pm7325_trip1: trip1 {

nit: the critical trip point is often named <name>-crit. One reason for
this could be that it allows to add other non-critical trip points (in
the .dtsi itself or the <board>.dts), without messing up the
enumeration scheme.

> +				temperature = <115000>;
> +				hysteresis = <0>;
> +				type = "critical";
> +			};
> +		};
> +	};
> +};