From patchwork Thu Oct 8 07:03:46 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Boyd X-Patchwork-Id: 7349291 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 80ABDBEEA4 for ; Thu, 8 Oct 2015 07:07:10 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9CAB120626 for ; Thu, 8 Oct 2015 07:07:09 +0000 (UTC) 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.kernel.org (Postfix) with ESMTPS id 7C2CE20623 for ; Thu, 8 Oct 2015 07:07:08 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zk5FK-0007ds-Ov; Thu, 08 Oct 2015 07:04:10 +0000 Received: from smtp.codeaurora.org ([198.145.29.96]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zk5FH-0007aG-VN for linux-arm-kernel@lists.infradead.org; Thu, 08 Oct 2015 07:04:08 +0000 Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id 5B082140E58; Thu, 8 Oct 2015 07:03:47 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 486) id 486BF140E76; Thu, 8 Oct 2015 07:03:47 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: sboyd@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id C04E9140E58; Thu, 8 Oct 2015 07:03:46 +0000 (UTC) Date: Thu, 8 Oct 2015 00:03:46 -0700 From: Stephen Boyd To: Rajendra Nayak Subject: Re: [PATCH v3 4/9] clk: qcom: create virtual child device for TSENS Message-ID: <20151008070345.GF26883@codeaurora.org> References: <1444280468-17159-1-git-send-email-rnayak@codeaurora.org> <1444280468-17159-5-git-send-email-rnayak@codeaurora.org> <20151008060557.GD26883@codeaurora.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20151008060557.GD26883@codeaurora.org> User-Agent: Mutt/1.5.21 (2010-09-15) X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151008_000408_061152_02919842 X-CRM114-Status: GOOD ( 20.63 ) X-Spam-Score: -2.6 (--) 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: linux-pm@vger.kernel.org, linux-arm-msm@vger.kernel.org, punit.agrawal@arm.com, edubezval@gmail.com, srinivas.kandagatla@linaro.org, lina.iyer@linaro.org, nrajan@codeaurora.org, rui.zhang@intel.com, linux-arm-kernel@lists.infradead.org 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 On 10/07, Stephen Boyd wrote: > On 10/08, Rajendra Nayak wrote: > > I've also been considering putting some devm stuff inside > qcom_cc_probe() itself so that in the normal case you don't even > need to call qcom_cc_remove(), it just gets done automatically. > That would open up the possibility for drivers to use the drvdata > member as they wish. > Something like this untested patch ---8<--- From: Stephen Boyd Subject: [PATCH] qcom: clk: Make qcom_cc_probe() fully devm safe Some APIs in qcom_cc_probe() don't have a devm counterpart, so we have to use the calling device's platform data to pass pointers to the remove path. Let's use devm_add_action() instead, so that the remove path doesn't need to do anything, allowing us to remove qcom_cc_remove() entirely. Signed-off-by: Stephen Boyd --- drivers/clk/qcom/common.c | 35 ++++++++++++++++++++++++----------- 1 file changed, 24 insertions(+), 11 deletions(-) diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c index 150692879e92..327d2e5d9f1c 100644 --- a/drivers/clk/qcom/common.c +++ b/drivers/clk/qcom/common.c @@ -73,6 +73,21 @@ qcom_cc_map(struct platform_device *pdev, const struct qcom_cc_desc *desc) } EXPORT_SYMBOL_GPL(qcom_cc_map); +static void qcom_cc_del_clk_provider(void *data) +{ + of_clk_del_provider(data); +} + +static void qcom_cc_reset_unregister(void *data) +{ + reset_controller_unregister(data); +} + +static void qcom_cc_gdsc_unregister(void *data) +{ + gdsc_unregister(data); +} + int qcom_cc_really_probe(struct platform_device *pdev, const struct qcom_cc_desc *desc, struct regmap *regmap) { @@ -111,6 +126,8 @@ int qcom_cc_really_probe(struct platform_device *pdev, if (ret) return ret; + devm_add_action(dev, qcom_cc_del_clk_provider, pdev->dev.of_node); + reset = &cc->reset; reset->rcdev.of_node = dev->of_node; reset->rcdev.ops = &qcom_reset_ops; @@ -118,25 +135,24 @@ int qcom_cc_really_probe(struct platform_device *pdev, reset->rcdev.nr_resets = desc->num_resets; reset->regmap = regmap; reset->reset_map = desc->resets; - platform_set_drvdata(pdev, &reset->rcdev); ret = reset_controller_register(&reset->rcdev); if (ret) - goto err_reset; + return ret; + + devm_add_action(dev, qcom_cc_reset_unregister, &reset->rcdev); if (desc->gdscs && desc->num_gdscs) { ret = gdsc_register(dev, desc->gdscs, desc->num_gdscs, &reset->rcdev, regmap); if (ret) - goto err_pd; + return ret; } + devm_add_action(dev, qcom_cc_gdsc_unregister, dev); + + return 0; -err_pd: - reset_controller_unregister(&reset->rcdev); -err_reset: - of_clk_del_provider(dev->of_node); - return ret; } EXPORT_SYMBOL_GPL(qcom_cc_really_probe); @@ -154,9 +170,6 @@ EXPORT_SYMBOL_GPL(qcom_cc_probe); void qcom_cc_remove(struct platform_device *pdev) { - gdsc_unregister(&pdev->dev); - of_clk_del_provider(pdev->dev.of_node); - reset_controller_unregister(platform_get_drvdata(pdev)); } EXPORT_SYMBOL_GPL(qcom_cc_remove);