From: Andy Shevchenko <andriy.shevchenko@intel.com>
To: Luca Weiss <luca.weiss@fairphone.com>
Cc: "Jonathan Cameron" <jic23@kernel.org>,
"David Lechner" <dlechner@baylibre.com>,
"Nuno Sá" <nuno.sa@analog.com>,
"Andy Shevchenko" <andy@kernel.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
"Zhang Rui" <rui.zhang@intel.com>,
"Lukasz Luba" <lukasz.luba@arm.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Laxman Dewangan" <ldewangan@nvidia.com>,
"Bjorn Andersson" <andersson@kernel.org>,
"Konrad Dybcio" <konradybcio@kernel.org>,
"Hans de Goede" <hansg@kernel.org>,
"Jens Reidel" <adrian@mainlining.org>,
"Casey Connolly" <casey.connolly@linaro.org>,
"Val Packett" <val@packett.cool>,
"Daniel Lezcano" <daniel.lezcano@kernel.org>,
~postmarketos/upstreaming@lists.sr.ht,
phone-devel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-pm@vger.kernel.org, devicetree@vger.kernel.org
Subject: Re: [PATCH v3 1/5] iio: adc: qcom-spmi-adc5: Add battery thermal channels
Date: Fri, 13 Nov 2026 18:24:14 +0200 [thread overview]
Message-ID: <avc5rnvIAEmZbyE1@ashevche-desk.local> (raw)
In-Reply-To: <20261113-bat-temp-adc-v3-1-743979a8fd90@fairphone.com>
On Fri, Nov 13, 2026 at 04:56:42PM +0100, Luca Weiss wrote:
> Add the BAT_THERM channels with millivolt as output, which can then be
> used along with information regarding the NTC in the battery, to get the
> actual battery temperature.
>
> A static lookup table in the ADC driver won't work since different
> devices have different Ohm and Beta values in their battery NTCs, for
> example a NTC can be 10kOhm & B=3435K.
...
> +static int qcom_vadc_scale_hw_calib_therm_volt(
This is broken indentation. Was `clang-format` being used to achieve that?
> + const struct u32_fract *prescale,
> + const struct adc5_data *data,
> + u16 adc_code, int *result_uv)
result_uV
> +{
> + *result_uv = qcom_vadc_scale_code_voltage_factor(adc_code,
> + prescale, data, 1000);
1000 is odd, can you use something from units.h or combination of those
to show what this multiplier is for?
> + return 0;
> +}
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2026-11-13 16:24 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-13 15:56 [PATCH v3 0/5] Battery temperature ADC plumbing on Qualcomm platforms Luca Weiss
2026-11-13 15:56 ` [PATCH v3 1/5] iio: adc: qcom-spmi-adc5: Add battery thermal channels Luca Weiss
2026-11-13 16:17 ` sashiko-bot
2026-11-13 16:24 ` Andy Shevchenko [this message]
2026-11-13 15:56 ` [PATCH v3 2/5] dt-bindings: thermal: generic-adc: Document #io-channel-cells Luca Weiss
2026-11-13 15:56 ` [PATCH v3 3/5] thermal/drivers/generic-adc: Allow probe without TZ registration Luca Weiss
2026-11-13 16:28 ` Andy Shevchenko
2026-11-13 15:56 ` [PATCH v3 4/5] arm64: dts: qcom: pm7250b: Define battery temperature ADC channels Luca Weiss
2026-11-13 15:56 ` [PATCH v3 5/5] arm64: dts: qcom: sm7225-fairphone-fp4: Add battery temperature node Luca Weiss
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