From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751606AbaLCHUD (ORCPT ); Wed, 3 Dec 2014 02:20:03 -0500 Received: from regular1.263xmail.com ([211.150.99.135]:44968 "EHLO regular1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750893AbaLCHUA (ORCPT ); Wed, 3 Dec 2014 02:20:00 -0500 X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-RL-SENDER: jay.xu@rock-chips.com X-SENDER-IP: 127.0.0.1 X-LOGIN-NAME: jay.xu@rock-chips.com X-UNIQUE-TAG: X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 From: Jianqun Xu To: lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz, tiwai@suse.de, sonnyrao@chromium.org, heiko@sntech.de Cc: linux-arm-kernel@lists.infradead.org, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-rockchip@lists.infradead.org, Jianqun Xu Subject: [PATCH v2 2/2] ASoC: rockchip: i2s: add support for grabbing output clock to codec Date: Wed, 3 Dec 2014 15:18:38 +0800 Message-Id: <1417591118-18695-3-git-send-email-jay.xu@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1417591118-18695-1-git-send-email-jay.xu@rock-chips.com> References: <1417531766-29669-1-git-send-email-jay.xu@rock-chips.com> <1417591118-18695-1-git-send-email-jay.xu@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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: Jianqun Xu --- sound/soc/rockchip/rockchip_i2s.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c index c74ba37..fd144ac 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 +440,15 @@ 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 +515,9 @@ 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); -- 1.9.1