From patchwork Wed Feb 24 13:15:26 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laxman Dewangan X-Patchwork-Id: 8406441 Return-Path: X-Original-To: patchwork-linux-mediatek@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 C6C7AC0553 for ; Wed, 24 Feb 2016 13:31:00 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E74102034C for ; Wed, 24 Feb 2016 13:30:59 +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 EDF2920303 for ; Wed, 24 Feb 2016 13:30:58 +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 1aYZWs-0002zv-8T; Wed, 24 Feb 2016 13:30:58 +0000 Received: from hqemgate15.nvidia.com ([216.228.121.64]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1aYZWD-0001H0-Gy; Wed, 24 Feb 2016 13:30:20 +0000 Received: from hqnvupgp07.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com id ; Wed, 24 Feb 2016 05:29:42 -0800 Received: from hqemhub03.nvidia.com ([172.20.150.15]) by hqnvupgp07.nvidia.com (PGP Universal service); Wed, 24 Feb 2016 05:28:52 -0800 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Wed, 24 Feb 2016 05:28:52 -0800 Received: from ldewanganubuntu-System-Product-Name.nvidia.com (172.20.144.16) by hqemhub03.nvidia.com (172.20.150.15) with Microsoft SMTP Server (TLS) id 8.3.406.0; Wed, 24 Feb 2016 05:29:53 -0800 From: Laxman Dewangan To: , , Subject: [PATCH 01/50] pinctrl: Add devm_ apis for pinctrl_{register, unregister} Date: Wed, 24 Feb 2016 18:45:26 +0530 Message-ID: <1456319775-3216-2-git-send-email-ldewangan@nvidia.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1456319775-3216-1-git-send-email-ldewangan@nvidia.com> References: <1456319775-3216-1-git-send-email-ldewangan@nvidia.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160224_053017_917209_9EAB27D3 X-CRM114-Status: GOOD ( 11.89 ) X-Spam-Score: -6.9 (------) X-BeenThere: linux-mediatek@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-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, Laxman Dewangan , bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add device managed APIs devm_pinctrl_register() and devm_pinctrl_unregister() for the APIs pinctrl_register() and pinctrl_unregister(). This helps in reducing code in error path and sometimes removal of .remove callback for driver unbind. Signed-off-by: Laxman Dewangan Reviewed-by: Philipp Zabel --- drivers/pinctrl/core.c | 69 +++++++++++++++++++++++++++++++++++++++++ include/linux/pinctrl/pinctrl.h | 6 ++++ 2 files changed, 75 insertions(+) diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index 2686a44..ea4a7e6 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -1861,6 +1861,75 @@ void pinctrl_unregister(struct pinctrl_dev *pctldev) } EXPORT_SYMBOL_GPL(pinctrl_unregister); +static void devm_pinctrl_dev_release(struct device *dev, void *res) +{ + struct pinctrl_dev *pctldev = *(struct pinctrl_dev **)res; + + pinctrl_unregister(pctldev); +} + +static int devm_pinctrl_dev_match(struct device *dev, void *res, void *data) +{ + struct pctldev **r = res; + + if (!r || !*r) { + WARN_ON(!r || !*r); + return 0; + } + + return *r == data; +} + +/** + * devm_pinctrl_register() - Resource manager pinctrl_register() + * @dev: parent device for this pin controller + * @pctldesc: descriptor for this pin controller + * @driver_data: private pin controller data for this pin controller + * + * Returns an error pointer if pincontrol register failed. Otherwise + * it returns valid pinctrl handle. + * + * The pinctrl device will be automatically released when the device is unbound. + */ +struct pinctrl_dev *devm_pinctrl_register(struct device *dev, + struct pinctrl_desc *pctldesc, + void *driver_data) +{ + struct pinctrl_dev **ptr, *pctldev; + + ptr = devres_alloc(devm_pinctrl_dev_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return ERR_PTR(-ENOMEM); + + pctldev = pinctrl_register(pctldesc, dev, driver_data); + if (IS_ERR(pctldev)) { + devres_free(ptr); + return pctldev; + } + + *ptr = pctldev; + devres_add(dev, ptr); + + return pctldev; +} +EXPORT_SYMBOL_GPL(devm_pinctrl_register); + +/** + * devm_pinctrl_unregister() - Resource manager of pinctrl_unregister() + * @dev: device for which which resource was allocated + * @pctldev: the pinctrl device to unregister. + */ +void devm_pinctrl_unregister(struct device *dev, struct pinctrl_dev *pctldev) +{ + int ret; + + ret = devres_release(dev, devm_pinctrl_dev_release, + devm_pinctrl_dev_match, pctldev); + if (!ret) + WARN_ON(ret); +} +EXPORT_SYMBOL_GPL(devm_pinctrl_unregister); + static int __init pinctrl_init(void) { pr_info("initialized pinctrl subsystem\n"); diff --git a/include/linux/pinctrl/pinctrl.h b/include/linux/pinctrl/pinctrl.h index 9ba59fc..a42e57d 100644 --- a/include/linux/pinctrl/pinctrl.h +++ b/include/linux/pinctrl/pinctrl.h @@ -144,6 +144,12 @@ struct pinctrl_desc { extern struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc, struct device *dev, void *driver_data); extern void pinctrl_unregister(struct pinctrl_dev *pctldev); +extern struct pinctrl_dev *devm_pinctrl_register(struct device *dev, + struct pinctrl_desc *pctldesc, + void *driver_data); +extern void devm_pinctrl_unregister(struct device *dev, + struct pinctrl_dev *pctldev); + extern bool pin_is_valid(struct pinctrl_dev *pctldev, int pin); extern void pinctrl_add_gpio_range(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range);