From: Nylon Chen <nylon.chen@sifive.com>
To: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org, linux-riscv@lists.infradead.org,
geert+renesas@glider.be, pavel@ucw.cz, vincent.chen@sifive.com,
nylon.chen@sifive.com, emil.renner.berthing@canonical.com,
aou@eecs.berkeley.edu, palmer@dabbelt.com,
paul.walmsley@sifive.com, krzysztof.kozlowski+dt@linaro.org,
robh+dt@kernel.org, conor@kernel.org, zong.li@sifive.com
Subject: [PATCH v4 0/1] Change PWM-controlled LED pin active mode and algorithm
Date: Thu, 3 Aug 2023 16:57:33 +0800 [thread overview]
Message-ID: <20230803085734.340-1-nylon.chen@sifive.com> (raw)
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
next reply other threads:[~2023-08-03 8:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-03 8:57 Nylon Chen [this message]
2023-08-03 8:57 ` [PATCH v4 1/1] riscv: dts: sifive: unleashed/unmatched: Remove PWM controlled LED's active-low properties Nylon Chen
2023-08-03 9:18 ` Conor Dooley
2023-08-03 9:28 ` Nylon Chen
2023-08-03 9:15 ` [PATCH v4 0/1] Change PWM-controlled LED pin active mode and algorithm Conor Dooley
2023-08-03 9:43 ` Conor Dooley
2023-08-04 1:42 ` Nylon Chen
2023-08-04 6:54 ` Nylon Chen
2023-08-04 9:09 ` Conor Dooley
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