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[216.228.112.21]) by smtp.gmail.com with ESMTPSA id 13sm22135713pfp.3.2020.08.10.01.37.33 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 10 Aug 2020 01:37:34 -0700 (PDT) Date: Mon, 10 Aug 2020 01:37:29 -0700 From: Nicolin Chen To: Shengjiu Wang Subject: Re: [PATCH v2] ASoC: fsl-asoc-card: Get "extal" clock rate by clk_get_rate Message-ID: <20200810083728.GA7560@Asurada-Nvidia> References: <1597047103-6863-1-git-send-email-shengjiu.wang@nxp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1597047103-6863-1-git-send-email-shengjiu.wang@nxp.com> User-Agent: Mutt/1.9.4 (2018-02-28) Cc: alsa-devel@alsa-project.org, timur@kernel.org, Xiubo.Lee@gmail.com, linuxppc-dev@lists.ozlabs.org, tiwai@suse.com, lgirdwood@gmail.com, broonie@kernel.org, festevam@gmail.com, linux-kernel@vger.kernel.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" 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 > --- > 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.