From patchwork Mon Jan 27 15:37:51 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jyri Sarha X-Patchwork-Id: 3543291 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 7490B9F381 for ; Mon, 27 Jan 2014 16:57:05 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B0E8A20121 for ; Mon, 27 Jan 2014 16:57:00 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 7360520108 for ; Mon, 27 Jan 2014 16:56:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BF9BFFA9F9; Mon, 27 Jan 2014 08:56:57 -0800 (PST) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from arroyo.ext.ti.com (arroyo.ext.ti.com [192.94.94.40]) by gabe.freedesktop.org (Postfix) with ESMTP id EF09D105920 for ; Mon, 27 Jan 2014 07:38:23 -0800 (PST) Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id s0RFcIrA003363; Mon, 27 Jan 2014 09:38:18 -0600 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id s0RFcIPe018120; Mon, 27 Jan 2014 09:38:18 -0600 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.2.342.3; Mon, 27 Jan 2014 09:38:17 -0600 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id s0RFcHHs032006; Mon, 27 Jan 2014 09:38:17 -0600 From: Jyri Sarha To: , , , , Subject: [PATCH RFC v3 2/8] ASoC: davinci-evm: Add named clock reference to DT bindings Date: Mon, 27 Jan 2014 17:37:51 +0200 Message-ID: X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: MIME-Version: 1.0 X-Mailman-Approved-At: Mon, 27 Jan 2014 08:55:09 -0800 Cc: peter.ujfalusi@ti.com, bcousson@baylibre.com, Jyri Sarha X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org X-Spam-Status: No, score=-4.7 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The referenced clock is used to get codec clock rate and the clock is disabled and enabled in startup and shutdown snd_soc_ops call backs. The change is also documented in DT bindigs document. Signed-off-by: Jyri Sarha cc: bcousson@baylibre.com --- .../bindings/sound/davinci-evm-audio.txt | 9 ++- sound/soc/davinci/davinci-evm.c | 58 +++++++++++++++++++- 2 files changed, 64 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt b/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt index 865178d..963e100 100644 --- a/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt +++ b/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt @@ -5,12 +5,19 @@ Required properties: - ti,model : The user-visible name of this sound complex. - ti,audio-codec : The phandle of the TLV320AIC3x audio codec - ti,mcasp-controller : The phandle of the McASP controller -- ti,codec-clock-rate : The Codec Clock rate (in Hz) applied to the Codec - ti,audio-routing : A list of the connections between audio components. Each entry is a pair of strings, the first being the connection's sink, the second being the connection's source. Valid names for sources and sinks are the codec's pins, and the jacks on the board: +Optional properties: +- ti,codec-clock-rate : The Codec Clock rate (in Hz) applied to the Codec. +- clocks : Reference to the master clock +- clock-names : The clock should be named "mclk" +- Either codec-clock-rate or the codec-clock reference has to be defined. If + the both are defined the driver attempts to set referenced clock to the + defined rate and takes the rate from the clock reference. + Board connectors: * Headphone Jack diff --git a/sound/soc/davinci/davinci-evm.c b/sound/soc/davinci/davinci-evm.c index 70ff377..d3e4cb0 100644 --- a/sound/soc/davinci/davinci-evm.c +++ b/sound/soc/davinci/davinci-evm.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include #include @@ -30,9 +31,34 @@ #include "davinci-i2s.h" struct snd_soc_card_drvdata_davinci { + struct clk *mclk; unsigned sysclk; }; +static int evm_startup(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_card *soc_card = rtd->codec->card; + struct snd_soc_card_drvdata_davinci *drvdata = + snd_soc_card_get_drvdata(soc_card); + + if (drvdata->mclk) + return clk_prepare_enable(drvdata->mclk); + + return 0; +} + +static void evm_shutdown(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_card *soc_card = rtd->codec->card; + struct snd_soc_card_drvdata_davinci *drvdata = + snd_soc_card_get_drvdata(soc_card); + + if (drvdata->mclk) + clk_disable_unprepare(drvdata->mclk); +} + static int evm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { @@ -59,6 +85,8 @@ static int evm_hw_params(struct snd_pcm_substream *substream, } static struct snd_soc_ops evm_ops = { + .startup = evm_startup, + .shutdown = evm_shutdown, .hw_params = evm_hw_params, }; @@ -348,6 +376,7 @@ static int davinci_evm_probe(struct platform_device *pdev) of_match_device(of_match_ptr(davinci_evm_dt_ids), &pdev->dev); struct snd_soc_dai_link *dai = (struct snd_soc_dai_link *) match->data; struct snd_soc_card_drvdata_davinci *drvdata = NULL; + struct clk *mclk; int ret = 0; evm_soc_card.dai_link = dai; @@ -367,13 +396,38 @@ static int davinci_evm_probe(struct platform_device *pdev) if (ret) return ret; + mclk = devm_clk_get(&pdev->dev, "mclk"); + if (PTR_ERR(mclk) == -EPROBE_DEFER) { + return -EPROBE_DEFER; + } else if (IS_ERR(mclk)) { + dev_dbg(&pdev->dev, "mclk not found.\n"); + mclk = NULL; + } + drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL); if (!drvdata) return -ENOMEM; + drvdata->mclk = mclk; + ret = of_property_read_u32(np, "ti,codec-clock-rate", &drvdata->sysclk); - if (ret < 0) - return -EINVAL; + + if (ret < 0) { + if (!drvdata->mclk) { + dev_err(&pdev->dev, + "No clock or clock rate defined.\n"); + return -EINVAL; + } + drvdata->sysclk = clk_get_rate(drvdata->mclk); + } else if (drvdata->mclk) { + unsigned int requestd_rate = drvdata->sysclk; + clk_set_rate(drvdata->mclk, drvdata->sysclk); + drvdata->sysclk = clk_get_rate(drvdata->mclk); + if (drvdata->sysclk != requestd_rate) + dev_warn(&pdev->dev, + "Could not get requested rate %u using %u.\n", + requestd_rate, drvdata->sysclk); + } snd_soc_card_set_drvdata(&evm_soc_card, drvdata); ret = devm_snd_soc_register_card(&pdev->dev, &evm_soc_card);