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Message-ID: <14e52c51-23ab-6877-dcec-2b1add958d71@gmail.com>
Date: Fri, 11 Dec 2020 17:29:48 +0200
From: Iskren Chernev <iskren.chernev@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
Chanwoo Choi <cw00.choi@...sung.com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Lee Jones <lee.jones@...aro.org>,
Sebastian Reichel <sre@...nel.org>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Andy Gross <agross@...nel.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Alessandro Zummo <a.zummo@...ertech.it>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
devicetree@...r.kernel.org, linux-pm@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-samsung-soc@...r.kernel.org, linux-arm-msm@...r.kernel.org,
linux-rtc@...r.kernel.org
Cc: Matheus Castello <matheus@...tello.eng.br>,
Sebastian Krzyszkowiak <sebastian.krzyszkowiak@...i.sm>,
Angus Ainslie <angus@...ea.ca>,
Hans de Goede <hdegoede@...hat.com>
Subject: Re: [PATCH 11/18] ARM: dts: qcom: msm8974-lge-nexus5: correct fuel
gauge interrupt trigger level
On 12/10/20 11:25 PM, Krzysztof Kozlowski wrote:
> The Maxim fuel gauge datasheets describe the interrupt line as active
> low with a requirement of acknowledge from the CPU. The falling edge
> interrupt will mostly work but it's not correct.
>
> Fixes: 45dfa741df86 ("ARM: dts: qcom: msm8974-lge-nexus5: Add fuel
gauge")
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
> ---
> arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
> index e769f638f205..4c6f54aa9f66 100644
> --- a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
> +++ b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
> @@ -575,7 +575,7 @@ fuelgauge: max17048@36 {
> maxim,rcomp = /bits/ 8 <0x4d>;
>
> interrupt-parent = <&msmgpio>;
> - interrupts = <9 IRQ_TYPE_EDGE_FALLING>;
> + interrupts = <9 IRQ_TYPE_LEVEL_LOW>;
>
> pinctrl-names = "default";
> pinctrl-0 = <&fuelgauge_pin>;
According to the datasheet for max17048 the ALRT pin is active low, so that
looks good. The reason it was implemented EDGE_FALLING is mostly due to
fragments taken from downstream, and the fact that it worked :)
Acked-by: Iskren Chernev <iskren.chernev@...il.com>
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