From: Fenglin Wu <fenglin.wu@oss.qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>,
linux-arm-msm@vger.kernel.org, Lee Jones <lee@kernel.org>,
Pavel Machek <pavel@kernel.org>
Cc: David Collins <david.collins@oss.qualcomm.com>,
Subbaraman Narayanamurthy
<subbaraman.narayanamurthy@oss.qualcomm.com>,
Kamal Wadhwa <kamal.wadhwa@oss.qualcomm.com>,
linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] leds: rgb: leds-qcom-lpg: Add PWM frequency mode support
Date: Mon, 3 Aug 2026 09:50:29 +0800 [thread overview]
Message-ID: <25e0797b-fdb3-44b2-8ea5-df0bc3355648@oss.qualcomm.com> (raw)
In-Reply-To: <7a0c4a70-b838-4c7c-9f16-d394ffef95ba@oss.qualcomm.com>
On 7/31/2026 10:20 PM, Konrad Dybcio wrote:
>> regmap_read(lpg->map, chan->base + LPG_SUBTYPE_REG, &chan->subtype);
>> + if (data->channels[i].fm_capable) {
>> + ret = regmap_read(lpg->map, chan->base + PWM_STATUS1_REG, &status);
>> + if (ret < 0)
>> + return ret;
>> +
>> + chan->fm_capable = !!(status & PWM_FM_PRESENT);
> Can we read this register blindly by chance and drop the match data?
It would result unnecessary read for the PWM channels which don't
support frequency mode. The register read here is actually just for
differentiating the HW revisions for pm8350c, where only the V2 support
frequency mode. And the newer variants of pm8350c PWM4 channel could
support frequency mode by default.
Thanks
Fenglin
next prev parent reply other threads:[~2026-08-03 1:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-29 9:48 Fenglin Wu
2026-07-31 14:20 ` Konrad Dybcio
2026-08-03 1:50 ` Fenglin Wu [this message]
2026-09-03 7:24 ` Konrad Dybcio
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=25e0797b-fdb3-44b2-8ea5-df0bc3355648@oss.qualcomm.com \
--to=fenglin.wu@oss.qualcomm.com \
--cc=david.collins@oss.qualcomm.com \
--cc=kamal.wadhwa@oss.qualcomm.com \
--cc=konrad.dybcio@oss.qualcomm.com \
--cc=lee@kernel.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-leds@vger.kernel.org \
--cc=pavel@kernel.org \
--cc=subbaraman.narayanamurthy@oss.qualcomm.com \
/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
all inboxes | Powered by JetHome®