From: Michael Walle <michael@walle.cc>
To: Mark Brown <broonie@kernel.org>
Cc: Sameer Pujar <spujar@nvidia.com>,
alsa-devel@alsa-project.org, devicetree@vger.kernel.org,
jonathanh@nvidia.com, kuninori.morimoto.gx@renesas.com,
linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org,
robh@kernel.org, sharadg@nvidia.com, thierry.reding@gmail.com
Subject: Re: [PATCH 1/3] ASoC: simple-card-utils: Fix device module clock
Date: Fri, 12 Mar 2021 13:01:41 +0100 [thread overview]
Message-ID: <6ed28bb5330879b1919aced5174f319f@walle.cc> (raw)
In-Reply-To: <20210312113544.GB5348@sirena.org.uk>
Am 2021-03-12 12:35, schrieb Mark Brown:
> On Thu, Mar 11, 2021 at 11:11:15PM +0100, Michael Walle wrote:
>> Am 2021-03-11 17:15, schrieb Mark Brown:
>
>> > The trick is figuring out if it's best to vary the input clock
>> > or to use the FLL to adapt a fixed input clock,
>
>> For simple-audio-card you can set the "clock" property if you want
>> that clock to be changed/enabled/disabled. But that doesn't seem to
>> be the way to go, at least it was NAKed by Rob for the
>> audio-graph-card.
>> I don't see a way to figure out if MCLK should be controlled by
>> simple-*-card without adding further properties to the device tree.
>
> If the card has a clock API clock as sysclk then set_sysclk(() should
> be configuring that clock.
What do you mean by "the card". The simple-audio-card itself?
Take a look at:
https://elixir.bootlin.com/linux/v5.12-rc2/source/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var3-ads2.dts#L29
Does the card has a clock? IMHO the WM8904 codec has a clock, but not
the audio card.
-michael
next prev parent reply other threads:[~2021-03-12 12:02 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-10 6:43 [PATCH 0/3] Use clocks property in a device node Sameer Pujar
2021-02-10 6:43 ` [PATCH 1/3] ASoC: simple-card-utils: Fix device module clock Sameer Pujar
2021-02-11 23:44 ` Kuninori Morimoto
2021-02-14 17:56 ` Sameer Pujar
2021-02-14 23:25 ` Kuninori Morimoto
2021-03-09 14:41 ` Michael Walle
2021-03-09 16:27 ` Sameer Pujar
2021-03-09 22:30 ` Michael Walle
2021-03-10 14:50 ` Sameer Pujar
2021-03-10 18:14 ` Michael Walle
2021-03-10 19:19 ` Sameer Pujar
2021-03-11 10:27 ` Michael Walle
2021-03-11 11:05 ` Sameer Pujar
2021-03-11 11:16 ` Michael Walle
2021-03-11 14:29 ` Sameer Pujar
2021-03-11 15:43 ` Michael Walle
2021-03-11 16:41 ` Mark Brown
2021-03-11 16:15 ` Mark Brown
2021-03-11 22:11 ` Michael Walle
2021-03-12 11:35 ` Mark Brown
2021-03-12 12:01 ` Michael Walle [this message]
2021-03-12 12:04 ` Mark Brown
2021-03-12 12:30 ` Michael Walle
2021-03-12 13:46 ` Mark Brown
2021-03-15 12:05 ` Michael Walle
2021-03-15 15:19 ` Sameer Pujar
2021-03-15 15:33 ` Michael Walle
2021-03-15 15:57 ` Sameer Pujar
2021-03-15 15:39 ` Mark Brown
2021-03-15 17:10 ` Sameer Pujar
2021-03-15 17:13 ` Michael Walle
2021-03-11 16:00 ` Mark Brown
2021-03-11 21:34 ` Michael Walle
2021-02-10 6:43 ` [PATCH 2/3] Revert "ASoC: audio-graph-card: Add clocks property to endpoint node" Sameer Pujar
2021-02-11 13:00 ` Mark Brown
2021-02-10 6:43 ` [PATCH 3/3] arm64: tegra: Move clocks from RT5658 endpoint to device node Sameer Pujar
2021-02-11 15:38 ` [PATCH 0/3] Use clocks property in a " Mark Brown
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