From patchwork Thu Oct 31 22:52:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leonard Crestez X-Patchwork-Id: 11222005 X-Patchwork-Delegate: cw00.choi@samsung.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D850E13BD for ; Thu, 31 Oct 2019 22:52:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C0E5020873 for ; Thu, 31 Oct 2019 22:52:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727742AbfJaWwZ (ORCPT ); Thu, 31 Oct 2019 18:52:25 -0400 Received: from inva021.nxp.com ([92.121.34.21]:51564 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726739AbfJaWwY (ORCPT ); Thu, 31 Oct 2019 18:52:24 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 73031200946; Thu, 31 Oct 2019 23:52:22 +0100 (CET) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 58DC0200130; Thu, 31 Oct 2019 23:52:22 +0100 (CET) Received: from fsr-ub1864-112.ea.freescale.net (fsr-ub1864-112.ea.freescale.net [10.171.82.98]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id 52A1B205E9; Thu, 31 Oct 2019 23:52:21 +0100 (CET) From: Leonard Crestez To: Georgi Djakov , Rob Herring , Chanwoo Choi Cc: =?utf-8?b?QXJ0dXIgxZp3aWdvxYQ=?= , Alexandre Bailon , "Rafael J. Wysocki" , Jacky Bai , Anson Huang , Abel Vesa , Krzysztof Kozlowski , MyungJoo Ham , Kyungmin Park , Saravana Kannan , Mark Rutland , Viresh Kumar , Shawn Guo , Dong Aisheng , Fabio Estevam , Stephen Boyd , Michael Turquette , Matthias Kaehlcke , Angus Ainslie , Martin Kepplinger , linux-pm@vger.kernel.org, kernel@pengutronix.de, linux-imx@nxp.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH RFC v5 04/10] PM / devfreq: Add devfreq_get_devfreq_by_node Date: Fri, 1 Nov 2019 00:52:03 +0200 Message-Id: <69885e720ae7d51b1080e2386b1612366d86a1f4.1572562150.git.leonard.crestez@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Split off part of devfreq_get_devfreq_by_phandle into a separate function. This allows callers to fetch devfreq instances by enumerating devicetree instead of explicit phandles. Signed-off-by: Leonard Crestez --- drivers/devfreq/devfreq.c | 42 +++++++++++++++++++++++++++++---------- include/linux/devfreq.h | 1 + 2 files changed, 32 insertions(+), 11 deletions(-) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index dab31b63eb10..bc83d0aab279 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -931,10 +931,33 @@ struct devfreq *devm_devfreq_add_device(struct device *dev, return devfreq; } EXPORT_SYMBOL(devm_devfreq_add_device); #ifdef CONFIG_OF +/* + * devfreq_get_devfreq_by_node - Get the devfreq device from devicetree + * @np - pointer to device_node + * + * return the instance of devfreq device + */ +struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node) +{ + struct devfreq *devfreq; + + mutex_lock(&devfreq_list_lock); + list_for_each_entry(devfreq, &devfreq_list, node) { + if (devfreq->dev.parent + && devfreq->dev.parent->of_node == node) { + mutex_unlock(&devfreq_list_lock); + return devfreq; + } + } + mutex_unlock(&devfreq_list_lock); + + return ERR_PTR(-EPROBE_DEFER); +} + /* * devfreq_get_devfreq_by_phandle - Get the devfreq device from devicetree * @dev - instance to the given device * @index - index into list of devfreq * @@ -953,25 +976,22 @@ struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index) node = of_parse_phandle(dev->of_node, "devfreq", index); if (!node) return ERR_PTR(-ENODEV); - mutex_lock(&devfreq_list_lock); - list_for_each_entry(devfreq, &devfreq_list, node) { - if (devfreq->dev.parent - && devfreq->dev.parent->of_node == node) { - mutex_unlock(&devfreq_list_lock); - of_node_put(node); - return devfreq; - } - } - mutex_unlock(&devfreq_list_lock); + devfreq = devfreq_get_devfreq_by_node(node); of_node_put(node); - return ERR_PTR(-EPROBE_DEFER); + return devfreq; } + #else +struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node) +{ + return ERR_PTR(-ENODEV); +} + struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index) { return ERR_PTR(-ENODEV); } #endif /* CONFIG_OF */ diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index fb376b5b7281..d4d1ec04aeea 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -242,10 +242,11 @@ extern int devm_devfreq_register_notifier(struct device *dev, unsigned int list); extern void devm_devfreq_unregister_notifier(struct device *dev, struct devfreq *devfreq, struct notifier_block *nb, unsigned int list); +extern struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node); extern struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index); #if IS_ENABLED(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND) /**