From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 69770C41535 for ; Fri, 22 Dec 2023 09:26:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=oYlL90oOCsbaoFTjCFW5THTF49toGc53GYZj7/SppbM=; b=VwzeWdoDYUbFRL RXvktvFinIu9VL9UTdRWvHkVpt+A+VK25UyN07S6GLJUL4uK7Oo8gJJDFDlqz5wcAqz6spobTaZTK nQj2JRJV7UA0WrimGQygx3dYF+yeFnKPo7WswjjUY7kjeL4BqR6HMhPy2BMaYMk9vuPYgLk3YXLYz 4q6i5SwF80KW0LSUNkxut0JHrWWFQYQFIF0Krs+wsaBzcUWBZvlm8VSBAK4gH11f2RtITUSe2yRdr SOzj2YuB/7Cw7rGstbVpuRNsW26FTfA0LzsMoctcqy6Gu11fn0RZcW9nKmGUa3aDThpFXyAD+PJA9 78Tksu3RvH0hIK8cv/Kg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rGbn4-005Q4A-0Z; Fri, 22 Dec 2023 09:25:58 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rGbn1-005Q3G-0u for linux-arm-kernel@lists.infradead.org; Fri, 22 Dec 2023 09:25:56 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 7761461B33; Fri, 22 Dec 2023 09:25:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5B8ABC433C8; Fri, 22 Dec 2023 09:25:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1703237154; bh=g5PUJh8PTpL1tF5KnBnUHiv5E/OxLzfs943WX1/SB4k=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Lf/fhSREOmAjxsgN0DJ/pc/Rv993BSoSWVyqANG+CWrn04wIWK5xCbezbTt582ya7 FIA2gpXA5busMe9LnhDH353CE5AAuYwo6nXKlrVADp+X4feql6a/X+uLDOu2ipEW+w +r08Wk7nI1Ym7Lyxc1pDvCzgAPkQ11CdmegMyFecuLFbXgDUaJ6iYu1OAyaf1WqqU2 1Ispy4VLnaI1g4xQ+PKm/HYr1Lq+PvgV56v9cPzeQr2hVxluAFhQW4lXoN6/LK9xdE O76Eb2VHccIhlHtjo+mOFfsSQQB9HS8OQ3x+gAztm3h7uXQJM/LfxL3Dn1wXfpZVG1 lAgIubdim1diw== Date: Fri, 22 Dec 2023 17:25:42 +0800 From: Peter Chen To: Xu Yang Cc: gregkh@linuxfoundation.org, shawnguo@kernel.org, s.hauer@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, luca.ceresoli@bootlin.com, jun.li@nxp.com, linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v2 1/3] usb: chipidea: ci_hdrc_imx: add wakeup clock and keep it always on Message-ID: <20231222092542.GC1951375@nchen-desktop> References: <20231218061420.3460145-1-xu.yang_2@nxp.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20231218061420.3460145-1-xu.yang_2@nxp.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231222_012555_430017_96251BBF X-CRM114-Status: GOOD ( 24.16 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 23-12-18 14:14:18, Xu Yang wrote: > Some platform using ChipIdea IP may keep 32KHz wakeup clock always > on without usb driver intervention. And some may need driver to handle > this clock. For now only i.MX93 needs this wakeup clock. This patch will > get wakeup clock and keep it always on to make controller work properly. > > Signed-off-by: Xu Yang Acked-by: Peter Chen > > --- > Changes in v2: > - modify commit msg to make it clear > --- > drivers/usb/chipidea/ci_hdrc_imx.c | 22 +++++++++++++++++++++- > 1 file changed, 21 insertions(+), 1 deletion(-) > > diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c > index e28bb2f2612d..4330be8240ff 100644 > --- a/drivers/usb/chipidea/ci_hdrc_imx.c > +++ b/drivers/usb/chipidea/ci_hdrc_imx.c > @@ -96,6 +96,7 @@ struct ci_hdrc_imx_data { > struct usb_phy *phy; > struct platform_device *ci_pdev; > struct clk *clk; > + struct clk *clk_wakeup; > struct imx_usbmisc_data *usbmisc_data; > bool supports_runtime_pm; > bool override_phy_control; > @@ -199,7 +200,7 @@ static int imx_get_clks(struct device *dev) > > data->clk_ipg = devm_clk_get(dev, "ipg"); > if (IS_ERR(data->clk_ipg)) { > - /* If the platform only needs one clocks */ > + /* If the platform only needs one primary clock */ > data->clk = devm_clk_get(dev, NULL); > if (IS_ERR(data->clk)) { > ret = PTR_ERR(data->clk); > @@ -208,6 +209,18 @@ static int imx_get_clks(struct device *dev) > PTR_ERR(data->clk), PTR_ERR(data->clk_ipg)); > return ret; > } > + /* Get wakeup clock. Not all of the platforms need to > + * handle this clock. So make it optional. > + */ > + data->clk_wakeup = devm_clk_get_optional(dev, > + "usb_wakeup_clk"); > + if (IS_ERR(data->clk_wakeup)) { > + ret = PTR_ERR(data->clk_wakeup); > + dev_err(dev, > + "Failed to get wakeup clk, err=%ld\n", > + PTR_ERR(data->clk_wakeup)); > + return ret; > + } > return ret; > } > > @@ -423,6 +436,10 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev) > if (ret) > goto disable_hsic_regulator; > > + ret = clk_prepare_enable(data->clk_wakeup); > + if (ret) > + goto err_wakeup_clk; > + > data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0); > if (IS_ERR(data->phy)) { > ret = PTR_ERR(data->phy); > @@ -504,6 +521,8 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev) > disable_device: > ci_hdrc_remove_device(data->ci_pdev); > err_clk: > + clk_disable_unprepare(data->clk_wakeup); > +err_wakeup_clk: > imx_disable_unprepare_clks(dev); > disable_hsic_regulator: > if (data->hsic_pad_regulator) > @@ -530,6 +549,7 @@ static void ci_hdrc_imx_remove(struct platform_device *pdev) > usb_phy_shutdown(data->phy); > if (data->ci_pdev) { > imx_disable_unprepare_clks(&pdev->dev); > + clk_disable_unprepare(data->clk_wakeup); > if (data->plat_data->flags & CI_HDRC_PMQOS) > cpu_latency_qos_remove_request(&data->pm_qos_req); > if (data->hsic_pad_regulator) > -- > 2.34.1 > > -- Thanks, Peter Chen _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel