From patchwork Wed Jul 19 15:59:07 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Zabel X-Patchwork-Id: 9852699 X-Patchwork-Delegate: agross@codeaurora.org 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 701EA60388 for ; Wed, 19 Jul 2017 15:59:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 615C128670 for ; Wed, 19 Jul 2017 15:59:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5624C28676; Wed, 19 Jul 2017 15:59:27 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E7C2828670 for ; Wed, 19 Jul 2017 15:59:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932791AbdGSP7W (ORCPT ); Wed, 19 Jul 2017 11:59:22 -0400 Received: from metis.ext.4.pengutronix.de ([92.198.50.35]:58633 "EHLO metis.ext.4.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932751AbdGSP7U (ORCPT ); Wed, 19 Jul 2017 11:59:20 -0400 Received: from lupine.hi.4.pengutronix.de ([10.1.0.115] helo=lupine.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.84_2) (envelope-from ) id 1dXrNY-0008Df-75; Wed, 19 Jul 2017 17:59:12 +0200 From: Philipp Zabel To: linux-kernel@vger.kernel.org Cc: Vivek Gautam , Jon Hunter , Felipe Balbi , Greg Kroah-Hartman , Thierry Reding , linux-tegra@vger.kernel.org, linux-usb@vger.kernel.org, linux-arm-msm@vger.kernel.org, kernel@pengutronix.de, Philipp Zabel Subject: [PATCH v7 3/4] usb: dwc3: of-simple: Add support to get resets for the device Date: Wed, 19 Jul 2017 17:59:07 +0200 Message-Id: <1500479948-29988-4-git-send-email-p.zabel@pengutronix.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1500479948-29988-1-git-send-email-p.zabel@pengutronix.de> References: <1500479948-29988-1-git-send-email-p.zabel@pengutronix.de> X-SA-Exim-Connect-IP: 10.1.0.115 X-SA-Exim-Mail-From: p.zabel@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-msm@vger.kernel.org Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Vivek Gautam Add support to get a list of resets available for the device. These resets must be kept de-asserted until the device is in use. Cc: Felipe Balbi Signed-off-by: Vivek Gautam [p.zabel@pengutronix.de: switch to hidden reset control array] Signed-off-by: Philipp Zabel --- No changes since v6. --- drivers/usb/dwc3/dwc3-of-simple.c | 27 +++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c index a9bac09d3750d..23d2221bde9df 100644 --- a/drivers/usb/dwc3/dwc3-of-simple.c +++ b/drivers/usb/dwc3/dwc3-of-simple.c @@ -29,11 +29,13 @@ #include #include #include +#include struct dwc3_of_simple { struct device *dev; struct clk **clks; int num_clocks; + struct reset_control *resets; }; static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count) @@ -96,9 +98,20 @@ static int dwc3_of_simple_probe(struct platform_device *pdev) platform_set_drvdata(pdev, simple); simple->dev = dev; + simple->resets = of_reset_control_array_get_optional_exclusive(np); + if (IS_ERR(simple->resets)) { + ret = PTR_ERR(simple->resets); + dev_err(dev, "failed to get device resets, err=%d\n", ret); + return ret; + } + + ret = reset_control_deassert(simple->resets); + if (ret) + goto err_resetc_put; + ret = dwc3_of_simple_clk_init(simple, of_clk_get_parent_count(np)); if (ret) - return ret; + goto err_resetc_assert; ret = of_platform_populate(np, NULL, NULL, dev); if (ret) { @@ -107,7 +120,7 @@ static int dwc3_of_simple_probe(struct platform_device *pdev) clk_put(simple->clks[i]); } - return ret; + goto err_resetc_assert; } pm_runtime_set_active(dev); @@ -115,6 +128,13 @@ static int dwc3_of_simple_probe(struct platform_device *pdev) pm_runtime_get_sync(dev); return 0; + +err_resetc_assert: + reset_control_assert(simple->resets); + +err_resetc_put: + reset_control_put(simple->resets); + return ret; } static int dwc3_of_simple_remove(struct platform_device *pdev) @@ -130,6 +150,9 @@ static int dwc3_of_simple_remove(struct platform_device *pdev) clk_put(simple->clks[i]); } + reset_control_assert(simple->resets); + reset_control_put(simple->resets); + pm_runtime_put_sync(dev); pm_runtime_disable(dev);