From: Amit Kucheria <amit.kucheria@linaro.org>
To: Stephen Boyd <swboyd@chromium.org>
Cc: Andy Gross <agross@kernel.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Mark Rutland <mark.rutland@arm.com>,
Rob Herring <robh+dt@kernel.org>, Zhang Rui <rui.zhang@intel.com>,
Andy Gross <andy.gross@linaro.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Eduardo Valentin <edubezval@gmail.com>,
linux-arm-msm <linux-arm-msm@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux PM list <linux-pm@vger.kernel.org>
Subject: Re: [PATCH 14/15] drivers: thermal: tsens: Create function to return sign-extended temperature
Date: Tue, 20 Aug 2019 02:21:28 +0530 [thread overview]
Message-ID: <CAHLCerN+xBTQapOeJRuX2=-Fo1GSVBhG-84memLHS4bG+SHyLw@mail.gmail.com> (raw)
In-Reply-To: <5d577f95.1c69fb81.6c07e.44da@mx.google.com>
On Sat, Aug 17, 2019 at 9:46 AM Stephen Boyd <swboyd@chromium.org> wrote:
>
> Quoting Amit Kucheria (2019-07-25 15:18:49)
> > diff --git a/drivers/thermal/qcom/tsens-common.c b/drivers/thermal/qcom/tsens-common.c
> > index 7ab2e740a1da..13a875b99094 100644
> > --- a/drivers/thermal/qcom/tsens-common.c
> > +++ b/drivers/thermal/qcom/tsens-common.c
> > @@ -84,13 +84,35 @@ static inline int code_to_degc(u32 adc_code, const struct tsens_sensor *s)
> > return degc;
> > }
> >
> > +/**
> > + * tsens_hw_to_mC - Return properly sign extended temperature in mCelsius,
>
> Can you make this proper kernel-doc? Describe the arguments and have a
> "Return:" section.
Will fix.
> > + * whether in ADC code or deciCelsius depending on IP version.
> > + * This function handles the different widths of the signed integer across IPs.
> > + */
> > +static int tsens_hw_to_mC(char *str, struct tsens_sensor *s, int field, int temp)
> > +{
> > + struct tsens_priv *priv = s->priv;
> > + u32 mask;
> > +
> > + if (priv->feat->adc) {
> > + /* Convert temperature from ADC code to milliCelsius */
> > + return code_to_degc(temp, s) * 1000;
> > + } else {
>
> Please deindent and drop the else because there's a return above.
Will fix.
> > + mask = GENMASK(priv->fields[field].msb,
> > + priv->fields[field].lsb) >> priv->fields[field].lsb;
>
> Why is the mask generated, shifted right, sent into fls(), and then
> passed to sign_extend32? Shoudln't it be something like
>
> sign_extend32(temp, priv->fields[field].msg - priv->fiels[field].lsb - 1)
Yes, that should work and greatly simply the function. Will fix.
> > + dev_dbg(priv->dev, "%s: mask: %d\n", str, fls(mask));
> > + /* Convert temperature from deciCelsius to milliCelsius */
> > + return sign_extend32(temp, fls(mask) - 1) * 100;
> > + }
> > +}
> > +
> > @@ -112,15 +134,7 @@ int get_temp_tsens_valid(struct tsens_sensor *s, int *temp)
> > if (ret)
> > return ret;
> >
> > - if (priv->feat->adc) {
> > - /* Convert temperature from ADC code to milliCelsius */
> > - *temp = code_to_degc(last_temp, s) * 1000;
> > - } else {
> > - mask = GENMASK(priv->fields[LAST_TEMP_0].msb,
> > - priv->fields[LAST_TEMP_0].lsb);
> > - /* Convert temperature from deciCelsius to milliCelsius */
> > - *temp = sign_extend32(last_temp, fls(mask) - 1) * 100;
>
> Oh the code is copied. Seems really complicated still.
>
> > - }
> > + *temp = tsens_hw_to_mC("get_temp", s, LAST_TEMP_0, last_temp);
next prev parent reply other threads:[~2019-08-19 20:51 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-25 22:18 [PATCH 00/15] thermal: qcom: tsens: Add interrupt support Amit Kucheria
2019-07-25 22:18 ` [PATCH 01/15] drivers: thermal: tsens: Get rid of id field in tsens_sensor Amit Kucheria
2019-08-17 4:01 ` Stephen Boyd
2019-08-19 11:55 ` Daniel Lezcano
2019-07-25 22:18 ` [PATCH 02/15] drivers: thermal: tsens: Simplify code flow in tsens_probe Amit Kucheria
2019-08-17 4:02 ` Stephen Boyd
2019-08-19 11:57 ` Daniel Lezcano
2019-07-25 22:18 ` [PATCH 03/15] drivers: thermal: tsens: Add __func__ identifier to debug statements Amit Kucheria
2019-08-17 4:03 ` Stephen Boyd
2019-08-19 13:19 ` Daniel Lezcano
2019-07-25 22:18 ` [PATCH 04/15] drivers: thermal: tsens: Add debugfs support Amit Kucheria
2019-08-17 4:07 ` Stephen Boyd
2019-08-19 7:58 ` Amit Kucheria
2019-08-19 14:27 ` Stephen Boyd
2019-08-21 12:55 ` Amit Kucheria
2019-08-26 20:55 ` Stephen Boyd
2019-07-25 22:18 ` [PATCH 05/15] arm: dts: msm8974: thermal: Add thermal zones for each sensor Amit Kucheria
2019-08-08 20:49 ` Brian Masney
2019-07-25 22:18 ` [PATCH 06/15] arm64: dts: msm8916: thermal: Fixup HW ids for cpu sensors Amit Kucheria
2019-08-13 13:25 ` Daniel Lezcano
2019-07-25 22:18 ` [PATCH 07/15] dt: thermal: tsens: Document interrupt support in tsens driver Amit Kucheria
2019-08-16 21:36 ` Rob Herring
2019-08-16 22:02 ` Amit Kucheria
2019-08-17 4:10 ` Stephen Boyd
2019-08-17 19:25 ` Rob Herring
2019-08-19 7:10 ` Amit Kucheria
2019-08-19 13:07 ` Rob Herring
2019-07-25 22:18 ` [PATCH 08/15] arm64: dts: sdm845: thermal: Add interrupt support Amit Kucheria
2019-07-25 22:18 ` [PATCH 09/15] arm64: dts: msm8996: " Amit Kucheria
2019-07-25 22:18 ` [PATCH 10/15] arm64: dts: msm8998: " Amit Kucheria
2019-07-25 22:18 ` [PATCH 11/15] arm64: dts: qcs404: " Amit Kucheria
2019-07-25 22:18 ` [PATCH 12/15] arm64: dts: msm8974: " Amit Kucheria
2019-07-29 9:03 ` Luca Weiss
2019-07-29 9:29 ` Amit Kucheria
2019-08-08 20:49 ` Brian Masney
2019-07-25 22:18 ` [PATCH 13/15] arm64: dts: msm8916: " Amit Kucheria
2019-07-25 22:18 ` [PATCH 14/15] drivers: thermal: tsens: Create function to return sign-extended temperature Amit Kucheria
2019-08-17 4:16 ` Stephen Boyd
2019-08-19 20:51 ` Amit Kucheria [this message]
2019-07-25 22:18 ` [PATCH 15/15] drivers: thermal: tsens: Add interrupt support Amit Kucheria
2019-08-17 6:09 ` Stephen Boyd
2019-08-22 13:40 ` Amit Kucheria
2019-07-26 10:36 ` [PATCH 00/15] thermal: qcom: " Brian Masney
2019-07-26 11:10 ` Amit Kucheria
2019-07-26 11:29 ` Brian Masney
2019-07-27 7:28 ` Amit Kucheria
2019-07-29 9:07 ` Brian Masney
2019-07-29 9:32 ` Luca Weiss
2019-07-29 9:50 ` Amit Kucheria
2019-08-12 15:28 ` Niklas Cassel
2019-08-08 13:04 ` Amit Kucheria
2019-10-16 7:33 Amit Kucheria
2019-10-16 7:34 ` [PATCH 14/15] drivers: thermal: tsens: Create function to return sign-extended temperature Amit Kucheria
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