linux-kernel - [PATCH v4 0/1] Change PWM-controlled LED pin active mode and algorithm

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Message-Id: <20230803085734.340-1-nylon.chen@sifive.com>
Date:   Thu,  3 Aug 2023 16:57:33 +0800
From:   Nylon Chen <nylon.chen@...ive.com>
To:     linux-kernel@...r.kernel.org
Cc:     devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
        geert+renesas@...der.be, pavel@....cz, vincent.chen@...ive.com,
        nylon.chen@...ive.com, emil.renner.berthing@...onical.com,
        aou@...s.berkeley.edu, palmer@...belt.com,
        paul.walmsley@...ive.com, krzysztof.kozlowski+dt@...aro.org,
        robh+dt@...nel.org, conor@...nel.org, zong.li@...ive.com
Subject: [PATCH v4 0/1] Change PWM-controlled LED pin active mode and algorithm

According to the circuit diagram of User LEDs - RGB described in themanual hifive-unleashed-a00.pdf[0] and hifive-unmatched-schematics-v3.pdf[1].

The behavior of PWM is acitve-high.

Removed patches: 1
New patches: (none)

Links:
- [0]:  https://sifive.cdn.prismic.io/sifive/c52a8e32-05ce-4aaf-95c8-7bf8453f8698_hifive-unleashed-a00-schematics-1.pdf
- [1]:  https://sifive.cdn.prismic.io/sifive/6a06d6c0-6e66-49b5-8e9e-e68ce76f4192_hifive-unmatched-schematics-v3.pdf
- [2]:  https://sifive.cdn.prismic.io/sifive/1a82e600-1f93-4f41-b2d8-86ed8b16acba_fu740-c000-manual-v1p6.pdf

Changed in v4:
 - Remove previous updates to the PWM algorithm.

Changed in v3:
 - Convert the reference link to standard link.
 - Move the inverted function before taking the minimum value.
 - Change polarity check condition(high and low).
 - Pick the biggest period length possible that is not bigger than the
   requested period.

Changed in v2:
 - Convert the reference link to standard link.
 - Fix typo: s/sifive unmatched:/sifive: unmatched:/.
 - Remove active-low from hifive-unleashed-a00.dts.
 - Include this reference link in the dts and pwm commit messages.


Nylon Chen (1):
  riscv: dts: sifive: unleashed/unmatched: Remove PWM controlled LED's
    active-low properties

 arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts | 4 ----
 arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts | 4 ----
 2 files changed, 8 deletions(-)

-- 
2.40.1