From patchwork Wed Nov 19 08:09:27 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jianqun Xu X-Patchwork-Id: 5334961 Return-Path: X-Original-To: patchwork-alsa-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 209709F1E1 for ; Wed, 19 Nov 2014 08:10:00 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 47C6E20179 for ; Wed, 19 Nov 2014 08:09:59 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id 0DA5B2012B for ; Wed, 19 Nov 2014 08:09:58 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id 172FA26549F; Wed, 19 Nov 2014 09:09:52 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (localhost [IPv6:::1]) by alsa0.perex.cz (Postfix) with ESMTP id 49DCC265455; Wed, 19 Nov 2014 09:09:44 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id 5F742265457; Wed, 19 Nov 2014 09:09:43 +0100 (CET) Received: from regular1.263xmail.com (regular1.263xmail.com [211.150.99.133]) by alsa0.perex.cz (Postfix) with ESMTP id 876A1265455 for ; Wed, 19 Nov 2014 09:09:34 +0100 (CET) Received: from jay.xu?rock-chips.com (unknown [192.168.167.128]) by regular1.263xmail.com (Postfix) with SMTP id 13B82741A; Wed, 19 Nov 2014 16:09:31 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id E462F1F83C; Wed, 19 Nov 2014 16:09:25 +0800 (CST) X-RL-SENDER: jay.xu@rock-chips.com X-FST-TO: heiko@sntech.de X-SENDER-IP: 127.0.0.1 X-LOGIN-NAME: jay.xu@rock-chips.com X-UNIQUE-TAG: <8f7c27c1d82777c169dee68056bb34e7> X-ATTACHMENT-NUM: 0 X-SENDER: xjq@rock-chips.com X-DNS-TYPE: 0 Received: from localhost.localdomain (unknown [127.0.0.1]) by smtp.263.net (Postfix) whith ESMTP id 24712VVPDXD; Wed, 19 Nov 2014 16:09:27 +0800 (CST) From: Jianqun Xu To: heiko@sntech.de, lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz, tiwai@suse.de, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, huangtao@rock-chips.com Date: Wed, 19 Nov 2014 16:09:27 +0800 Message-Id: <1416384567-29476-1-git-send-email-jay.xu@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1416366468-4744-1-git-send-email-jay.xu@rock-chips.com> References: <1416366468-4744-1-git-send-email-jay.xu@rock-chips.com> Cc: Sonny Rao , Jianqun Xu Subject: [alsa-devel] [PATCH v2 2/2] ASoC: rockchip: i2s: add support for grabbing output clock to codec X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 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: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP Patch is from Sonny Rao We need to claim the clock which is driving the codec so that when we enable clock gating, we continue to clock the codec when needed. I make this an optional clock since there might be some applications where we don't need it but can still use the I2S block. Signed-off-by: Sonny Rao Signed-off-by: Sonny Rao Signed-off-by: Jianqun Xu --- changes since v1: - modify commit message sound/soc/rockchip/rockchip_i2s.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c index c74ba37..2820ade 100644 --- a/sound/soc/rockchip/rockchip_i2s.c +++ b/sound/soc/rockchip/rockchip_i2s.c @@ -28,6 +28,7 @@ struct rk_i2s_dev { struct clk *hclk; struct clk *mclk; + struct clk *oclk; struct snd_dmaengine_dai_dma_data capture_dma_data; struct snd_dmaengine_dai_dma_data playback_dma_data; @@ -439,6 +440,14 @@ static int rockchip_i2s_probe(struct platform_device *pdev) return PTR_ERR(i2s->mclk); } + i2s->oclk = devm_clk_get(&pdev->dev, "i2s_clk_out"); + if (IS_ERR(i2s->oclk)) { + dev_dbg(&pdev->dev, "Didn't find output clock\n"); + i2s->oclk = NULL; + } + if (i2s->oclk) + ret = clk_prepare_enable(i2s->oclk); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(regs)) @@ -505,6 +514,8 @@ static int rockchip_i2s_remove(struct platform_device *pdev) if (!pm_runtime_status_suspended(&pdev->dev)) i2s_runtime_suspend(&pdev->dev); + if (i2s->oclk) + clk_disable_unprepare(i2s->oclk); clk_disable_unprepare(i2s->mclk); clk_disable_unprepare(i2s->hclk); snd_dmaengine_pcm_unregister(&pdev->dev);