From: Shengjiu Wang <shengjiu.wang@gmail.com>
To: Nicolin Chen <nicoleotsuka@gmail.com>
Cc: Linux-ALSA <alsa-devel@alsa-project.org>,
Timur Tabi <timur@kernel.org>, Xiubo Li <Xiubo.Lee@gmail.com>,
Fabio Estevam <festevam@gmail.com>,
Shengjiu Wang <shengjiu.wang@nxp.com>,
Takashi Iwai <tiwai@suse.com>,
Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>,
linuxppc-dev@lists.ozlabs.org,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2] ASoC: fsl-asoc-card: Get "extal" clock rate by clk_get_rate
Date: Mon, 10 Aug 2020 16:50:10 +0800 [thread overview]
Message-ID: <CAA+D8ANmEMnRR1N4QRh7y4=+XUpKYnXRQ4LRKw6VG=totd8rwA@mail.gmail.com> (raw)
In-Reply-To: <20200810083728.GA7560@Asurada-Nvidia>
On Mon, Aug 10, 2020 at 4:39 PM Nicolin Chen <nicoleotsuka@gmail.com> wrote:
>
> On Mon, Aug 10, 2020 at 04:11:43PM +0800, Shengjiu Wang wrote:
> > On some platform(.e.g. i.MX8QM MEK), the "extal" clock is different
> > with the mclk of codec, then the clock rate is also different.
> > So it is better to get clock rate of "extal" rate by clk_get_rate,
> > don't reuse the clock rate of mclk.
> >
> > Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
> > ---
> > changes in v2
> > - add defer probe handler
> >
> > sound/soc/fsl/fsl-asoc-card.c | 11 +++++++++++
> > 1 file changed, 11 insertions(+)
> >
> > diff --git a/sound/soc/fsl/fsl-asoc-card.c b/sound/soc/fsl/fsl-asoc-card.c
> > index 52adedc03245..32f8f756e6bb 100644
> > --- a/sound/soc/fsl/fsl-asoc-card.c
> > +++ b/sound/soc/fsl/fsl-asoc-card.c
> > @@ -696,6 +696,17 @@ static int fsl_asoc_card_probe(struct platform_device *pdev)
> > goto asrc_fail;
> > }
> > } else if (of_node_name_eq(cpu_np, "esai")) {
> > + struct clk *esai_clk = clk_get(&cpu_pdev->dev, "extal");
> > +
> > + if (!IS_ERR(esai_clk)) {
> > + priv->cpu_priv.sysclk_freq[TX] = clk_get_rate(esai_clk);
> > + priv->cpu_priv.sysclk_freq[RX] = clk_get_rate(esai_clk);
>
> Will it break existing imx-audio-cs42888 on older i.MX platforms?
> 'cause it overwrites cpu_priv.sysclk_freq[] that are set in "card
> configurations" section.
Tested, no break for imx6.
best regards
wang shengjiu
next prev parent reply other threads:[~2020-08-10 8:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-10 8:11 [PATCH v2] ASoC: fsl-asoc-card: Get "extal" clock rate by clk_get_rate Shengjiu Wang
2020-08-10 8:37 ` Nicolin Chen
2020-08-10 8:50 ` Shengjiu Wang [this message]
2020-08-10 23:13 ` Nicolin Chen
2020-08-18 16:54 ` Mark Brown
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