From patchwork Fri Aug 16 05:03:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shengjiu Wang X-Patchwork-Id: 11096751 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 77135912 for ; Fri, 16 Aug 2019 05:22:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 63325205A4 for ; Fri, 16 Aug 2019 05:22:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 57232289CF; Fri, 16 Aug 2019 05:22:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 73802205A4 for ; Fri, 16 Aug 2019 05:22:54 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id C1EA8851; Fri, 16 Aug 2019 07:22:01 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz C1EA8851 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1565932971; bh=ARtvYWZkRdNNq2Xdh9m508h0T8XkGRPjBCbkVV6zzkg=; h=From:To:Date:Cc:Subject:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From; b=dYt1m7FSCyjTbqm0fYe1bGbYvA6Mau0bI07GFh/EDzn17mMOkXtqh1gDA7FQNMaBC RdyO/mVZvF/upftswsizLQgBv250Z3nAXwQjv3HrWxOsyAQWiaSgLuTWOOvTUZrjRb 7a8p8U3AWTmRH+cb46vLJnwvNwjB/5C45xXQBJRs= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 370A4F80213; Fri, 16 Aug 2019 07:22:01 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id 38F56F80214; Fri, 16 Aug 2019 07:22:00 +0200 (CEST) Received: from inva021.nxp.com (inva021.nxp.com [92.121.34.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id B2379F8011F for ; Fri, 16 Aug 2019 07:21:56 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz B2379F8011F Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 0D4C9200078; Fri, 16 Aug 2019 07:21:55 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id E9C6C2000A6; Fri, 16 Aug 2019 07:21:47 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 1D839402EC; Fri, 16 Aug 2019 13:21:39 +0800 (SGT) From: Shengjiu Wang To: timur@kernel.org, nicoleotsuka@gmail.com, Xiubo.Lee@gmail.com, festevam@gmail.com, broonie@kernel.org, lgirdwood@gmail.com, perex@perex.cz, tiwai@suse.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, alsa-devel@alsa-project.org Date: Fri, 16 Aug 2019 01:03:14 -0400 Message-Id: <1565931794-7218-1-git-send-email-shengjiu.wang@nxp.com> X-Mailer: git-send-email 2.7.4 X-Virus-Scanned: ClamAV using ClamSMTP Cc: linuxppc-dev@lists.ozlabs.org, linux-imx@nxp.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [alsa-devel] [PATCH] ASoC: imx-audmux: Add driver suspend and resume to support MEGA Fast 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: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" X-Virus-Scanned: ClamAV using ClamSMTP For i.MX6 SoloX, there is a mode of the SoC to shutdown all power source of modules during system suspend and resume procedure. Thus, AUDMUX needs to save all the values of registers before the system suspend and restore them after the system resume. Signed-off-by: Shengjiu Wang --- sound/soc/fsl/imx-audmux.c | 54 +++++++++++++++++++++++++++++++++++++- 1 file changed, 53 insertions(+), 1 deletion(-) diff --git a/sound/soc/fsl/imx-audmux.c b/sound/soc/fsl/imx-audmux.c index 7595f24a006e..3ce85a43e08f 100644 --- a/sound/soc/fsl/imx-audmux.c +++ b/sound/soc/fsl/imx-audmux.c @@ -23,6 +23,8 @@ static struct clk *audmux_clk; static void __iomem *audmux_base; +static u32 *regcache; +static u32 reg_max; #define IMX_AUDMUX_V2_PTCR(x) ((x) * 8) #define IMX_AUDMUX_V2_PDCR(x) ((x) * 8 + 4) @@ -315,8 +317,23 @@ static int imx_audmux_probe(struct platform_device *pdev) if (of_id) pdev->id_entry = of_id->data; audmux_type = pdev->id_entry->driver_data; - if (audmux_type == IMX31_AUDMUX) + + switch (audmux_type) { + case IMX31_AUDMUX: audmux_debugfs_init(); + reg_max = 14; + break; + case IMX21_AUDMUX: + reg_max = 6; + break; + default: + dev_err(&pdev->dev, "unsupported version!\n"); + return -EINVAL; + } + + regcache = devm_kzalloc(&pdev->dev, sizeof(u32) * reg_max, GFP_KERNEL); + if (!regcache) + return -ENOMEM; if (of_id) imx_audmux_parse_dt_defaults(pdev, pdev->dev.of_node); @@ -332,12 +349,47 @@ static int imx_audmux_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int imx_audmux_suspend(struct device *dev) +{ + int i; + + clk_prepare_enable(audmux_clk); + + for (i = 0; i < reg_max; i++) + regcache[i] = readl(audmux_base + i * 4); + + clk_disable_unprepare(audmux_clk); + + return 0; +} + +static int imx_audmux_resume(struct device *dev) +{ + int i; + + clk_prepare_enable(audmux_clk); + + for (i = 0; i < reg_max; i++) + writel(regcache[i], audmux_base + i * 4); + + clk_disable_unprepare(audmux_clk); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops imx_audmux_pm = { + SET_SYSTEM_SLEEP_PM_OPS(imx_audmux_suspend, imx_audmux_resume) +}; + static struct platform_driver imx_audmux_driver = { .probe = imx_audmux_probe, .remove = imx_audmux_remove, .id_table = imx_audmux_ids, .driver = { .name = DRIVER_NAME, + .pm = &imx_audmux_pm, .of_match_table = imx_audmux_dt_ids, } };