From patchwork Wed Dec 28 22:57:01 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Boyd X-Patchwork-Id: 9490763 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 08CF562AB0 for ; Wed, 28 Dec 2016 23:01:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E7D7026242 for ; Wed, 28 Dec 2016 23:01:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DC6F426490; Wed, 28 Dec 2016 23:01:50 +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=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 7014926242 for ; Wed, 28 Dec 2016 23:01:50 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1cMNCt-0003SV-W1; Wed, 28 Dec 2016 23:00:28 +0000 Received: from mail-pf0-x22b.google.com ([2607:f8b0:400e:c00::22b]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1cMNAO-00012a-2S for linux-arm-kernel@lists.infradead.org; Wed, 28 Dec 2016 22:57:53 +0000 Received: by mail-pf0-x22b.google.com with SMTP id 189so60100039pfz.3 for ; Wed, 28 Dec 2016 14:57:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=WJn9reic1D6qc7TEeBw5RD9fl9dZtExzbhAUXvadfds=; b=SJWc3t54FyPfFUgN+Z9ZOd9YYJRbnmVwy/Yl2MITCc5CKNWuxXtAB2fZlBYYe/jkMd jY4SEMKb4ls+Fxf9K1VdccPZzTLXvF1VPIQ8EbSHCp0LfHR77zSi3ctsq6CjQn1yvmLF OJlCaLOvHu150jbu6i9kAgjq7q8d8p9cA+up8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=WJn9reic1D6qc7TEeBw5RD9fl9dZtExzbhAUXvadfds=; b=pSHMd3PR2r1g2zjQ5UlbqL61/o/uydbBZozP4Kj70R1/RNGgWMJj9FCinIksdlwrfV nye9ITOG+ilaXBQ3l0Q7u+QUcVev+05yb8H4+xmBEAt077WVeEkvVzwBnkjy9G8+OOK9 Yx/qOp+Ui7sGxHgBR3JjLXbI3ffVVn+T+w2PPX0KRIXj8DF7ML3xpl6Ehd4ngrWRLAII faJAjgKU/mzNJiwq3JdvumalbEv2//p25yLObdI41lbsgqx73xYMh1Rq5YNqYQaGKcJU E9pEE1gC0uMOlnxL+LZMnbF2xprskst6o/FF0Zk+5m73owEl3oacuA/6JhfOWQ9U+Gfk w4fA== X-Gm-Message-State: AIkVDXIb2dT2ucoKDidHVLEaX4AwD2yB++wz3OWdeQG31A3qTES8RcZKi8j3RLOpyyBbVZxj X-Received: by 10.84.210.35 with SMTP id z32mr70257015plh.112.1482965851021; Wed, 28 Dec 2016 14:57:31 -0800 (PST) Received: from localhost.localdomain (i-global254.qualcomm.com. [199.106.103.254]) by smtp.gmail.com with ESMTPSA id x4sm100355741pgc.14.2016.12.28.14.57.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 28 Dec 2016 14:57:30 -0800 (PST) From: Stephen Boyd To: linux-usb@vger.kernel.org Subject: [PATCH v6 15/25] usb: chipidea: msm: Add proper clk and reset support Date: Wed, 28 Dec 2016 14:57:01 -0800 Message-Id: <20161228225711.698-16-stephen.boyd@linaro.org> X-Mailer: git-send-email 2.10.0.297.gf6727b0 In-Reply-To: <20161228225711.698-1-stephen.boyd@linaro.org> References: <20161228225711.698-1-stephen.boyd@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161228_145752_244941_A72D81D6 X-CRM114-Status: GOOD ( 15.94 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Felipe Balbi , Arnd Bergmann , Neil Armstrong , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Bjorn Andersson , Peter Chen , Greg Kroah-Hartman , Andy Gross , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The msm chipidea controller uses two main clks, an AHB clk to read/write the MMIO registers and a core clk called the system clk that drives the controller itself. Add support for these clks as they're required in all designs. Also add support for an optional third clk that we need to turn on to reset the controller and wrapper logic and other "housekeeping" things. This clk was removed in later revisions of the hardware because the reset methodology no longer required clks to be enabled to propagate resets. Acked-by: Peter Chen Cc: Greg Kroah-Hartman Signed-off-by: Stephen Boyd --- drivers/usb/chipidea/ci_hdrc_msm.c | 72 +++++++++++++++++++++++++++++++++++--- 1 file changed, 68 insertions(+), 4 deletions(-) diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c index b282a717bf8c..7e870a253f55 100644 --- a/drivers/usb/chipidea/ci_hdrc_msm.c +++ b/drivers/usb/chipidea/ci_hdrc_msm.c @@ -10,11 +10,20 @@ #include #include #include +#include +#include #include "ci.h" #define HS_PHY_AHB_MODE 0x0098 +struct ci_hdrc_msm { + struct platform_device *ci; + struct clk *core_clk; + struct clk *iface_clk; + struct clk *fs_clk; +}; + static void ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event) { struct device *dev = ci->gadget.dev.parent; @@ -52,11 +61,20 @@ static struct ci_hdrc_platform_data ci_hdrc_msm_platdata = { static int ci_hdrc_msm_probe(struct platform_device *pdev) { + struct ci_hdrc_msm *ci; struct platform_device *plat_ci; struct usb_phy *phy; + struct clk *clk; + struct reset_control *reset; + int ret; dev_dbg(&pdev->dev, "ci_hdrc_msm_probe\n"); + ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL); + if (!ci) + return -ENOMEM; + platform_set_drvdata(pdev, ci); + /* * OTG(PHY) driver takes care of PHY initialization, clock management, * powering up VBUS, mapping of registers address space and power @@ -68,29 +86,75 @@ static int ci_hdrc_msm_probe(struct platform_device *pdev) ci_hdrc_msm_platdata.usb_phy = phy; + reset = devm_reset_control_get(&pdev->dev, "core"); + if (IS_ERR(reset)) + return PTR_ERR(reset); + + ci->core_clk = clk = devm_clk_get(&pdev->dev, "core"); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + ci->iface_clk = clk = devm_clk_get(&pdev->dev, "iface"); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + ci->fs_clk = clk = devm_clk_get(&pdev->dev, "fs"); + if (IS_ERR(clk)) { + if (PTR_ERR(clk) == -EPROBE_DEFER) + return -EPROBE_DEFER; + ci->fs_clk = NULL; + } + + ret = clk_prepare_enable(ci->fs_clk); + if (ret) + return ret; + + reset_control_assert(reset); + usleep_range(10000, 12000); + reset_control_deassert(reset); + + clk_disable_unprepare(ci->fs_clk); + + ret = clk_prepare_enable(ci->core_clk); + if (ret) + return ret; + + ret = clk_prepare_enable(ci->iface_clk); + if (ret) + goto err_iface; + plat_ci = ci_hdrc_add_device(&pdev->dev, pdev->resource, pdev->num_resources, &ci_hdrc_msm_platdata); if (IS_ERR(plat_ci)) { dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n"); - return PTR_ERR(plat_ci); + ret = PTR_ERR(plat_ci); + goto err_mux; } - platform_set_drvdata(pdev, plat_ci); + ci->ci = plat_ci; pm_runtime_set_active(&pdev->dev); pm_runtime_no_callbacks(&pdev->dev); pm_runtime_enable(&pdev->dev); return 0; + +err_mux: + clk_disable_unprepare(ci->iface_clk); +err_iface: + clk_disable_unprepare(ci->core_clk); + return ret; } static int ci_hdrc_msm_remove(struct platform_device *pdev) { - struct platform_device *plat_ci = platform_get_drvdata(pdev); + struct ci_hdrc_msm *ci = platform_get_drvdata(pdev); pm_runtime_disable(&pdev->dev); - ci_hdrc_remove_device(plat_ci); + ci_hdrc_remove_device(ci->ci); + clk_disable_unprepare(ci->iface_clk); + clk_disable_unprepare(ci->core_clk); return 0; }