From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753406AbbLIEJj (ORCPT ); Tue, 8 Dec 2015 23:09:39 -0500 Received: from mailout3.samsung.com ([203.254.224.33]:42691 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752917AbbLIEIY (ORCPT ); Tue, 8 Dec 2015 23:08:24 -0500 X-AuditID: cbfee690-f79646d000001316-d5-5667a93013be From: Chanwoo Choi To: myungjoo.ham@samsung.com, k.kozlowski@samsung.com, kgene@kernel.org Cc: kyungmin.park@samsung.com, robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, linux@arm.linux.org.uk, tjakobi@math.uni-bielefeld.de, linux.amoon@gmail.com, cw00.choi@samsung.com, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v2 06/19] PM / devfreq: Add devfreq_get_devfreq_by_phandle() Date: Wed, 09 Dec 2015 13:07:58 +0900 Message-id: <1449634091-1842-7-git-send-email-cw00.choi@samsung.com> X-Mailer: git-send-email 1.8.0 In-reply-to: <1449634091-1842-1-git-send-email-cw00.choi@samsung.com> References: <1449634091-1842-1-git-send-email-cw00.choi@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrAIsWRmVeSWpSXmKPExsWyRsSkWNdgZXqYwZxl4hbXvzxntZh/5Byr Rf+bhawW516tZLR4/cLQov/xa2aLs01v2C0u75rDZvG59wijxYzz+5gs1m28xW5x+zKvxdLr F5ksbjeuYLOYMH0ti0Xr3iPsFm2rP7A6CHqsmbeG0aOluYfN43JfL5PHzll32T1WLv/C5rFp VSebx79j7B59W1YxenzeJBfAGcVlk5Kak1mWWqRvl8CVceZ5M2vBF/GKhVeOsjQw/hfuYuTk kBAwkTj6cAszhC0mceHeerYuRi4OIYEVjBKz2paywxR1T9nBDJGYxShx/+8GKOcLo8Tna61s IFVsAloS+1/cALNFBNwlvt7bDTaKWeALk0Tr5O9gO4QFfCRWTL8DVsQioCox7dNvJhCbV8BF 4s+n/WwQ6+QkPux5BLaaU8BV4sr2d4wgthBQzbGnTUwgQyUEGjkktu9dzwoxSEDi2+RDLF2M HEAJWYlNB6D+kZQ4uOIGywRG4QWMDKsYRVMLkguKk9KLTPSKE3OLS/PS9ZLzczcxAiPu9L9n E3Yw3jtgfYhRgINRiYf3gkt6mBBrYllxZe4hRlOgDROZpUST84FxnVcSb2hsZmRhamJqbGRu aaYkzvta6mewkEB6YklqdmpqQWpRfFFpTmrxIUYmDk6pBkah/fdSzG7qrjE/J+ZrcXzDg/9H 13DfPXbzwGbGzIR31p8jlBbsuDP74fcZDIHW0z8G5ba0mNqZ2cToxzzzZi3n63XizJnfs8jI 9yevS5enMfcPc9WcgsVJPgc+KhQ//dBqs+x668Le3dUn/j9n5Bdb3LLR56FpwLxjto/fyT5V v+ZT/ChMnF2JpTgj0VCLuag4EQCi65XsswIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrLIsWRmVeSWpSXmKPExsVy+t9jQV2DlelhBttWCFpc//Kc1WL+kXOs Fv1vFrJanHu1ktHi9QtDi/7Hr5ktzja9Ybe4vGsOm8Xn3iOMFjPO72OyWLfxFrvF7cu8Fkuv X2SyuN24gs1iwvS1LBate4+wW7St/sDqIOixZt4aRo+W5h42j8t9vUweO2fdZfdYufwLm8em VZ1sHv+OsXv0bVnF6PF5k1wAZ1QDo01GamJKapFCal5yfkpmXrqtkndwvHO8qZmBoa6hpYW5 kkJeYm6qrZKLT4CuW2YO0CtKCmWJOaVAoYDE4mIlfTtME0JD3HQtYBojdH1DguB6jAzQQMIa xowzz5tZC76IVyy8cpSlgfG/cBcjJ4eEgIlE95QdzBC2mMSFe+vZuhi5OIQEZjFK3P+7gRnC +cIo8flaKxtIFZuAlsT+FzfAbBEBd4mv93aDdTALfGGSaJ38HWyUsICPxIrpd8CKWARUJaZ9 +s0EYvMKuEj8+bSfDWKdnMSHPY/YQWxOAVeJK9vfMYLYQkA1x542MU1g5F3AyLCKUSK1ILmg OCk91zAvtVyvODG3uDQvXS85P3cTIziqn0ntYDy4y/0QowAHoxIP7wWX9DAh1sSy4srcQ4wS HMxKIrxatUAh3pTEyqrUovz4otKc1OJDjKZAh01klhJNzgcmnLySeENjEzMjSyNzQwsjY3Ml cd7aS5FhQgLpiSWp2ampBalFMH1MHJxSDYw953QPnVrJ8zNzcsrquDtdGeuWnM08sEFuZ+9M hyUOWT8Toqf8ZOGeYeuw4MC8z89kc2duPSaymfF5Vqj9yafrRAV3KVfNYJKU+fC9nGNr8YL3 3u9/nK2RS7vx/Ifv5q4wdZEDhx6K2my3m/48dZ9+gnPBbbnfc3qmPdQRUVr9+4iDPqvY/WsZ SizFGYmGWsxFxYkALf5n6AADAAA= DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds the new devfreq_get_devfreq_by_phandle() OF helper function which can find the instance of devfreq device by using phandle ("devfreq"). Signed-off-by: Chanwoo Choi --- drivers/devfreq/devfreq.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ include/linux/devfreq.h | 9 +++++++++ 2 files changed, 53 insertions(+) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 15e58779e4c0..78ea4cdaa82c 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -25,6 +25,7 @@ #include #include #include +#include #include "governor.h" static struct class *devfreq_class; @@ -686,6 +687,49 @@ struct devfreq *devm_devfreq_add_device(struct device *dev, } EXPORT_SYMBOL(devm_devfreq_add_device); +#ifdef CONFIG_OF +/* + * devfreq_get_devfreq_by_phandle - Get the devfreq device from devicetree + * @dev - instance to the given device + * @index - index into list of devfreq + * + * return the instance of devfreq device + */ +struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index) +{ + struct device_node *node; + struct devfreq *devfreq; + + if (!dev) + return ERR_PTR(-EINVAL); + + if (!dev->of_node) + return ERR_PTR(-EINVAL); + + 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); + return devfreq; + } + } + mutex_unlock(&devfreq_list_lock); + + return ERR_PTR(-EPROBE_DEFER); +} +#else +struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index) +{ + return ERR_PTR(-ENODEV); +} +#endif /* CONFIG_OF */ +EXPORT_SYMBOL_GPL(devfreq_get_devfreq_by_phandle); + /** * devm_devfreq_remove_device() - Resource-managed devfreq_remove_device() * @dev: the device to add devfreq feature. diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index f7a6e6bd716e..d648041145ba 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -211,6 +211,9 @@ extern int devm_devfreq_register_opp_notifier(struct device *dev, extern void devm_devfreq_unregister_opp_notifier(struct device *dev, struct devfreq *devfreq); +extern struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, + int index); + /** * devfreq_update_stats() - update the last_status pointer in struct devfreq * @df: the devfreq instance whose status needs updating @@ -324,6 +327,12 @@ static inline void devm_devfreq_unregister_opp_notifier(struct device *dev, { } +static inline struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, + int index) +{ + return ERR_PTR(-ENODEV); +} + static inline int devfreq_update_stats(struct devfreq *df) { return -EINVAL; -- 1.9.1