From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Alessandro Zummo <a.zummo@towertech.it>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
devicetree@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>,
linux-rtc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 5/8] rtc: isl12022: implement RTC_VL_READ ioctl
Date: Tue, 13 Jun 2023 18:20:56 +0300 [thread overview]
Message-ID: <ZIiJWKBFojAcNCkA@smile.fi.intel.com> (raw)
In-Reply-To: <20230613130011.305589-6-linux@rasmusvillemoes.dk>
On Tue, Jun 13, 2023 at 03:00:07PM +0200, Rasmus Villemoes wrote:
> Hook up support for reading the values of the SR_LBAT85 and SR_LBAT75
> bits. Translate the former to "battery low", and the latter to
> "battery empty or not-present".
A couple of nit-picks below.
...
> +static int isl12022_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
> +{
> + struct regmap *regmap = dev_get_drvdata(dev);
> + u32 user = 0, val;
This assignment can be done in the actual case below.
> + int ret;
> +
> + switch (cmd) {
> + case RTC_VL_READ:
> + ret = regmap_read(regmap, ISL12022_REG_SR, &val);
> + if (ret < 0)
I always feel uneasy with ' < 0' — Does positive error makes sense?
Is it even possible? OTOH if the entire driver uses this idiom...
oh well, let's make it consistent.
> + return ret;
user = 0;
The rationale to avoid potential mistakes in the future in case this function
will be expanded and user will be re-used.
> + if (val & ISL12022_SR_LBAT85)
> + user |= RTC_VL_BACKUP_LOW;
> +
> + if (val & ISL12022_SR_LBAT75)
> + user |= RTC_VL_BACKUP_EMPTY;
> +
> + return put_user(user, (u32 __user *)arg);
> +
> + default:
> + return -ENOIOCTLCMD;
> + }
> +}
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2023-06-13 15:21 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-12 11:30 [PATCH 0/8] rtc: isl12022: battery backup voltage and clock support Rasmus Villemoes
2023-06-12 11:30 ` [PATCH 1/8] rtc: isl12022: remove wrong warning for low battery level Rasmus Villemoes
2023-06-12 11:30 ` [PATCH 2/8] dt-bindings: rtc: Move isil,isl12022 from trivial-rtc.yaml into own schema file Rasmus Villemoes
2023-06-12 12:26 ` Rob Herring
2023-06-12 12:36 ` Rasmus Villemoes
2023-06-12 13:54 ` Alexandre Belloni
2023-06-12 14:20 ` Rob Herring
2023-06-13 8:13 ` Rasmus Villemoes
2023-06-12 11:30 ` [PATCH 3/8] dt-bindings: rtc: isl12022: add bindings for battery alarm trip levels Rasmus Villemoes
2023-06-12 11:30 ` [PATCH 4/8] rtc: isl12022: add support for trip level DT bindings Rasmus Villemoes
2023-06-12 15:44 ` Andy Shevchenko
2023-06-12 18:10 ` kernel test robot
2023-06-12 18:58 ` kernel test robot
2023-06-12 11:30 ` [PATCH 5/8] rtc: isl12022: implement RTC_VL_READ and RTC_VL_CLR ioctls Rasmus Villemoes
2023-06-12 14:07 ` Alexandre Belloni
2023-06-13 7:27 ` Rasmus Villemoes
2023-06-12 15:48 ` Andy Shevchenko
2023-06-12 16:10 ` Alexandre Belloni
2023-06-13 7:53 ` Rasmus Villemoes
2023-06-13 9:00 ` Alexandre Belloni
2023-06-12 11:30 ` [PATCH 6/8] rtc: isl12022: trigger battery level detection during probe Rasmus Villemoes
2023-06-12 12:30 ` Rasmus Villemoes
2023-06-12 14:17 ` Alexandre Belloni
2023-06-13 7:51 ` Rasmus Villemoes
2023-06-12 14:15 ` Alexandre Belloni
2023-06-13 7:44 ` Rasmus Villemoes
2023-06-13 8:58 ` Alexandre Belloni
2023-06-12 11:30 ` [PATCH 7/8] dt-bindings: rtc: isl12022: add #clock-cells property Rasmus Villemoes
2023-06-13 7:41 ` Krzysztof Kozlowski
2023-06-12 11:30 ` [PATCH 8/8] rtc: isl12022: implement support for the #clock-cells DT property Rasmus Villemoes
2023-06-13 13:00 ` [PATCH v2 0/8] rtc: isl12022: battery backup voltage and clock support Rasmus Villemoes
2023-06-13 13:00 ` [PATCH v2 1/8] rtc: isl12022: remove wrong warning for low battery level Rasmus Villemoes
2023-06-13 13:00 ` [PATCH v2 2/8] dt-bindings: rtc: Move isil,isl12022 from trivial-rtc.yaml into own schema file Rasmus Villemoes
2023-06-13 19:06 ` Krzysztof Kozlowski
2023-06-13 13:00 ` [PATCH v2 3/8] dt-bindings: rtc: isl12022: add bindings for battery alarm trip levels Rasmus Villemoes
2023-06-13 19:09 ` Krzysztof Kozlowski
2023-06-13 19:51 ` Rasmus Villemoes
2023-06-13 21:37 ` Krzysztof Kozlowski
2023-06-13 13:00 ` [PATCH v2 4/8] rtc: isl12022: add support for trip level DT bindings Rasmus Villemoes
2023-06-13 13:00 ` [PATCH v2 5/8] rtc: isl12022: implement RTC_VL_READ ioctl Rasmus Villemoes
2023-06-13 15:20 ` Andy Shevchenko [this message]
2023-06-13 21:26 ` Alexandre Belloni
2023-06-14 12:16 ` Andy Shevchenko
2023-06-14 13:50 ` Alexandre Belloni
2023-06-14 15:13 ` Andy Shevchenko
2023-06-15 10:53 ` Rasmus Villemoes
2023-06-15 10:58 ` Andy Shevchenko
2023-06-13 13:00 ` [PATCH v2 6/8] rtc: isl12022: trigger battery level detection during probe Rasmus Villemoes
2023-06-13 13:00 ` [PATCH v2 7/8] dt-bindings: rtc: isl12022: add #clock-cells property Rasmus Villemoes
2023-06-13 19:10 ` Krzysztof Kozlowski
2023-06-13 20:25 ` Rasmus Villemoes
2023-06-13 21:38 ` Krzysztof Kozlowski
2023-06-13 13:00 ` [PATCH v2 8/8] rtc: isl12022: implement support for the #clock-cells DT property Rasmus Villemoes
2023-06-13 15:25 ` Andy Shevchenko
2023-06-14 10:51 ` Rasmus Villemoes
2023-06-14 12:13 ` Andy Shevchenko
2023-06-13 19:10 ` kernel test robot
2023-06-14 5:27 ` kernel test robot
2023-06-13 15:26 ` [PATCH v2 0/8] rtc: isl12022: battery backup voltage and clock support Andy Shevchenko
2023-06-13 19:06 ` Krzysztof Kozlowski
2023-06-15 11:03 ` Rasmus Villemoes
2023-06-15 10:58 ` [PATCH v3 " Rasmus Villemoes
2023-06-15 10:58 ` [PATCH v3 1/8] rtc: isl12022: remove wrong warning for low battery level Rasmus Villemoes
2023-06-15 10:58 ` [PATCH v3 2/8] dt-bindings: rtc: Move isil,isl12022 from trivial-rtc.yaml into own schema file Rasmus Villemoes
2023-06-15 10:58 ` [PATCH v3 3/8] dt-bindings: rtc: isl12022: add bindings for battery alarm trip levels Rasmus Villemoes
2023-06-17 8:12 ` Krzysztof Kozlowski
2023-06-15 10:58 ` [PATCH v3 4/8] rtc: isl12022: add support for trip level DT binding Rasmus Villemoes
2023-06-15 11:11 ` Andy Shevchenko
2023-06-19 7:27 ` Rasmus Villemoes
2023-06-15 10:58 ` [PATCH v3 5/8] rtc: isl12022: implement RTC_VL_READ ioctl Rasmus Villemoes
2023-06-15 10:58 ` [PATCH v3 6/8] rtc: isl12022: trigger battery level detection during probe Rasmus Villemoes
2023-06-15 10:58 ` [PATCH v3 7/8] dt-bindings: rtc: isl12022: add #clock-cells property Rasmus Villemoes
2023-06-17 8:13 ` Krzysztof Kozlowski
2023-06-15 10:58 ` [PATCH v3 8/8] rtc: isl12022: implement support for the #clock-cells DT property Rasmus Villemoes
2023-07-28 14:31 ` [PATCH v3 0/8] rtc: isl12022: battery backup voltage and clock support Rasmus Villemoes
2023-08-03 6:45 ` Rasmus Villemoes
2023-08-09 12:28 ` Rasmus Villemoes
2023-08-15 23:28 ` Alexandre Belloni
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