From: Hans de Goede <hdegoede@redhat.com>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: "Rafael J . Wysocki" <rjw@rjwysocki.net>,
Mark Gross <markgross@kernel.org>,
Andy Shevchenko <andy@infradead.org>,
Wolfram Sang <wsa@the-dreams.de>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Daniel Scally <djrscally@gmail.com>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>, Len Brown <lenb@kernel.org>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
Platform Driver <platform-driver-x86@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-i2c <linux-i2c@vger.kernel.org>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Kate Hsuan <hpa@redhat.com>,
Linux Media Mailing List <linux-media@vger.kernel.org>,
linux-clk <linux-clk@vger.kernel.org>
Subject: Re: [PATCH v4 05/11] clk: Introduce clk-tps68470 driver
Date: Mon, 1 Nov 2021 12:00:49 +0100 [thread overview]
Message-ID: <4aec04d1-0964-e4c3-2c92-f9cef395494a@redhat.com> (raw)
In-Reply-To: <CAHp75VfUq+DZk_u5Wsyr5nnibbe+WrYDyhvCU22=4Pog06DgHg@mail.gmail.com>
Hi,
On 11/1/21 11:42, Andy Shevchenko wrote:
> On Mon, Nov 1, 2021 at 12:27 PM Hans de Goede <hdegoede@redhat.com> wrote:
>> On 10/25/21 13:24, Andy Shevchenko wrote:
>>> On Mon, Oct 25, 2021 at 12:42 PM Hans de Goede <hdegoede@redhat.com> wrote:
>
> ...
>
>>>> + for (i = 0; i < ARRAY_SIZE(clk_freqs); i++) {
>>>> + diff = clk_freqs[i].freq - rate;
>>>> + if (diff == 0)
>>>> + return i;
>>>
>>>> + diff = abs(diff);
>>>
>>> This needs a comment why higher (lower) frequency is okay.
>>
>> This function is called in 2 places:
>>
>> 1. From tps68470_clk_round_rate(), where higher/lower clearly is ok,
>> (see the function name) so no comment needed.
>>
>> 2. From tps68470_clk_set_rate() where it is NOT ok and this is
>> enforced in the caller:
>>
>> unsigned int idx = tps68470_clk_cfg_lookup(rate);
>>
>> if (rate != clk_freqs[idx].freq)
>> return -EINVAL;
>>
>> This is not easy to describe in a comment, while being obvious
>> if someone looking at this actually looks at the callers.
>
> Hmm... but try your best. :-)
Ok I will :)
> While at it, recently I have learned about util_macros.h. Any use of it here?
> Or amending it there and re-using it here?
That only works on straight integer/long/float arrays, not
on arrays of structs where we are looking for a specific member of
the struct to be closest. And reworking that to also work on
structs is really (really really) out of scope for this patch-set.
Regards,
Hans
>
>>>> + if (diff < best_diff) {
>>>> + best_diff = diff;
>>>> + best_idx = i;
>>>> + }
>>>> + }
>
next prev parent reply other threads:[~2021-11-01 11:00 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-25 9:41 [PATCH v4 00/11] Add support for X86/ACPI camera sensor/PMIC setup with clk and regulator platform data Hans de Goede
2021-10-25 9:41 ` [PATCH v4 01/11] ACPI: delay enumeration of devices with a _DEP pointing to an INT3472 device Hans de Goede
2021-10-27 18:52 ` Rafael J. Wysocki
2021-11-01 11:16 ` Hans de Goede
2021-10-25 9:41 ` [PATCH v4 02/11] i2c: acpi: Use acpi_dev_ready_for_enumeration() helper Hans de Goede
2021-10-27 18:53 ` Rafael J. Wysocki
2021-10-25 9:41 ` [PATCH v4 03/11] platform_data: Add linux/platform_data/tps68470.h file Hans de Goede
2021-10-25 9:41 ` [PATCH v4 04/11] regulator: Introduce tps68470-regulator driver Hans de Goede
2021-10-25 11:11 ` Andy Shevchenko
2021-11-01 10:20 ` Hans de Goede
2021-10-28 16:23 ` Mark Brown
2021-11-09 12:14 ` Sakari Ailus
2021-11-09 12:29 ` Andy Shevchenko
2021-11-11 15:13 ` Hans de Goede
2021-10-25 9:41 ` [PATCH v4 05/11] clk: Introduce clk-tps68470 driver Hans de Goede
2021-10-25 11:24 ` Andy Shevchenko
2021-11-01 10:27 ` Hans de Goede
2021-11-01 10:42 ` Andy Shevchenko
2021-11-01 11:00 ` Hans de Goede [this message]
2021-11-01 11:11 ` Andy Shevchenko
2021-10-25 9:41 ` [PATCH v4 06/11] platform/x86: int3472: Enable I2c daisy chain Hans de Goede
2021-10-25 9:41 ` [PATCH v4 07/11] platform/x86: int3472: Split into 2 drivers Hans de Goede
2021-10-25 9:41 ` [PATCH v4 08/11] platform/x86: int3472: Add get_sensor_adev_and_name() helper Hans de Goede
2021-10-25 11:31 ` Andy Shevchenko
2021-11-01 10:31 ` Hans de Goede
2021-11-01 10:44 ` Andy Shevchenko
2021-11-01 10:46 ` Andy Shevchenko
2021-11-01 10:49 ` Hans de Goede
2021-11-01 10:51 ` Andy Shevchenko
2021-11-01 10:48 ` Hans de Goede
2021-10-25 9:41 ` [PATCH v4 09/11] platform/x86: int3472: Pass tps68470_clk_platform_data to the tps68470-regulator MFD-cell Hans de Goede
2021-10-25 11:33 ` Andy Shevchenko
2021-10-25 9:41 ` [PATCH v4 10/11] platform/x86: int3472: Pass tps68470_regulator_platform_data " Hans de Goede
2021-10-25 11:38 ` Andy Shevchenko
2021-11-01 11:31 ` Hans de Goede
2021-11-01 14:25 ` Andy Shevchenko
2021-10-25 9:41 ` [PATCH v4 11/11] platform/x86: int3472: Deal with probe ordering issues Hans de Goede
2021-10-25 11:40 ` Andy Shevchenko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4aec04d1-0964-e4c3-2c92-f9cef395494a@redhat.com \
--to=hdegoede@redhat.com \
--cc=andy.shevchenko@gmail.com \
--cc=andy@infradead.org \
--cc=broonie@kernel.org \
--cc=djrscally@gmail.com \
--cc=hpa@redhat.com \
--cc=laurent.pinchart@ideasonboard.com \
--cc=lenb@kernel.org \
--cc=lgirdwood@gmail.com \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-i2c@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=markgross@kernel.org \
--cc=mchehab@kernel.org \
--cc=mika.westerberg@linux.intel.com \
--cc=mturquette@baylibre.com \
--cc=platform-driver-x86@vger.kernel.org \
--cc=rjw@rjwysocki.net \
--cc=sakari.ailus@linux.intel.com \
--cc=sboyd@kernel.org \
--cc=wsa@the-dreams.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).