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

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Message-ID: <6b85273758e5c667e1952b41fe901b8a@codeaurora.org>
Date:   Wed, 07 Apr 2021 20:59:26 +0530
From:   skakit@...eaurora.org
To:     Matthias Kaehlcke <mka@...omium.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 2021-04-03 02:05, Matthias Kaehlcke wrote:
> On Fri, Apr 02, 2021 at 10:35:54AM -0700, Matthias Kaehlcke wrote:
>> 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>;
> 
> The GPIO enumeration is a bit confusing. The pm7325 has GPIO_01 to
> GPIO_10, however IIUC they are mapped such that under Linux
> enumeration starts with 0. I guess it makes sense to start with 0 and
> it's done consistently for 'qcom,spmi-gpio', but it's something that 
> must
> be taken into account when using/configuring those GPIOs.

Sure, will take care of this while configuring the GPIOs.