From: Lukasz Luba <lukasz.luba@arm.com>
To: Chanwoo Choi <cw00.choi@samsung.com>,
robh+dt@kernel.org, krzk@kernel.org, heiko@sntech.de,
leonard.crestez@nxp.com
Cc: mark.rutland@arm.com, a.swigon@samsung.com,
m.szyprowski@samsung.com, kgene@kernel.org,
myungjoo.ham@samsung.com, kyungmin.park@samsung.com,
linux-pm@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org
Subject: Re: [PATCH v2 01/11] PM / devfreq: Add devfreq_get_devfreq_by_node function
Date: Thu, 9 Jan 2020 09:47:31 +0000 [thread overview]
Message-ID: <71da0ef9-1e72-dddc-dcb4-e4cb28b67183@arm.com> (raw)
In-Reply-To: <20191220002430.11995-2-cw00.choi@samsung.com>
Hi Chanwoo,
On 12/20/19 12:24 AM, Chanwoo Choi wrote:
> From: Leonard Crestez <leonard.crestez@nxp.com>
>
> 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.
>
> [lkp: Reported the build error]
> Reported-by: kbuild test robot <lkp@intel.com>
> Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
> [cw00.choi: Export devfreq_get_devfreq_by_node function and
> add function to devfreq.h when CONFIG_PM_DEVFREQ is enabled.]
> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
> ---
> drivers/devfreq/devfreq.c | 46 +++++++++++++++++++++++++++++----------
> include/linux/devfreq.h | 6 +++++
> 2 files changed, 41 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
> index 89260b17598f..cb8ca81c8973 100644
> --- a/drivers/devfreq/devfreq.c
> +++ b/drivers/devfreq/devfreq.c
> @@ -966,6 +966,32 @@ struct devfreq *devm_devfreq_add_device(struct device *dev,
> EXPORT_SYMBOL(devm_devfreq_add_device);
>
> #ifdef CONFIG_OF
> +/*
> + * devfreq_get_devfreq_by_node - Get the devfreq device from devicetree
> + * @node - pointer to device_node
> + *
> + * return the instance of devfreq device
> + */
> +struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node)
> +{
> + struct devfreq *devfreq;
> +
> + if (!node)
> + return ERR_PTR(-EINVAL);
> +
> + 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(-ENODEV);
> +}
> +
> /*
> * devfreq_get_devfreq_by_phandle - Get the devfreq device from devicetree
> * @dev - instance to the given device
> @@ -988,26 +1014,24 @@ struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int 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 */
> +EXPORT_SYMBOL_GPL(devfreq_get_devfreq_by_node);
> EXPORT_SYMBOL_GPL(devfreq_get_devfreq_by_phandle);
>
> /**
> diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
> index c6f82d4bec9f..1dccc47acbce 100644
> --- a/include/linux/devfreq.h
> +++ b/include/linux/devfreq.h
> @@ -253,6 +253,7 @@ 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);
It can go without 'extern' in the header.
> extern struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev,
> int index);
>
> @@ -407,6 +408,11 @@ static inline void devm_devfreq_unregister_notifier(struct device *dev,
> {
> }
>
> +static inline struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node)
> +{
> + return ERR_PTR(-ENODEV);
> +}
> +
> static inline struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev,
> int index)
> {
>
Apart from this minor thing, looks good to me.
When you fix it, feel free to add
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Regards,
Lukasz
next prev parent reply other threads:[~2020-01-09 9:47 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20191220001759epcas1p131a41a619847d80c64470f7c1920121f@epcas1p1.samsung.com>
2019-12-20 0:24 ` [PATCH v2 00/11] PM / devfreq: Remove deprecated 'devfreq' and 'devfreq-events' properties Chanwoo Choi
[not found] ` <CGME20191220001759epcas1p4bbbcf6a84c09229db0ddae86be294405@epcas1p4.samsung.com>
2019-12-20 0:24 ` [PATCH v2 01/11] PM / devfreq: Add devfreq_get_devfreq_by_node function Chanwoo Choi
2020-01-09 9:47 ` Lukasz Luba [this message]
[not found] ` <CGME20191220001759epcas1p4ce1c2017937a35de84eab720b9732df0@epcas1p4.samsung.com>
2019-12-20 0:24 ` [PATCH v2 02/11] PM / devfreq: Remove devfreq_get_devfreq_by_phandle function Chanwoo Choi
2019-12-20 0:46 ` Leonard Crestez
2019-12-20 1:00 ` Chanwoo Choi
2019-12-20 1:40 ` Leonard Crestez
2019-12-20 2:14 ` Chanwoo Choi
2020-01-09 10:37 ` Lukasz Luba
2020-01-09 10:54 ` Chanwoo Choi
2020-01-09 10:57 ` Lukasz Luba
[not found] ` <CGME20191220001759epcas1p1fc0e5019514f7c99606347432d66bfd0@epcas1p1.samsung.com>
2019-12-20 0:24 ` [PATCH v2 03/11] PM / devfreq: event: Add devfreq_event_get_edev_by_node function Chanwoo Choi
[not found] ` <CGME20191220001759epcas1p3051f7916542b7234aac5273e0baab83b@epcas1p3.samsung.com>
2019-12-20 0:24 ` [PATCH v2 04/11] dt-bindings: devfreq: exynos-bus: Replace deprecated 'devfreq' and 'devfreq-events' property Chanwoo Choi
2019-12-20 8:43 ` Krzysztof Kozlowski
[not found] ` <CGME20191220001759epcas1p495fc9cdb6f2bd86abf63d16f61e68804@epcas1p4.samsung.com>
2019-12-20 0:24 ` [PATCH v2 05/11] dt-bindings: devfreq: rk3399_dmc: Replace deprecated " Chanwoo Choi
[not found] ` <CGME20191220001800epcas1p364322170854fdd171c43f6b1de2b61a4@epcas1p3.samsung.com>
2019-12-20 0:24 ` [PATCH v2 06/11] dt-bindings: memory: exynos5422-dmc: Replace the " Chanwoo Choi
[not found] ` <CGME20191220001800epcas1p3accefc4384d9503481311f25f5794cb8@epcas1p3.samsung.com>
2019-12-20 0:24 ` [PATCH v2 07/11] PM / devfreq: exynos-bus: Replace the deprecated 'devfreq' and " Chanwoo Choi
[not found] ` <CGME20191220001800epcas1p383927f73060e0e9aaad2fd9aaf881b6d@epcas1p3.samsung.com>
2019-12-20 0:24 ` [PATCH v2 08/11] PM / devfreq: rk3399_dmc: Replace the deprecated " Chanwoo Choi
[not found] ` <CGME20191220001800epcas1p41ab059757aeec99060cb4f47b0f48ac0@epcas1p4.samsung.com>
2019-12-20 0:24 ` [PATCH v2 09/11] memory: samsung: exynos5422-dmc: " Chanwoo Choi
[not found] ` <CGME20191220001800epcas1p2f2dfd9d24e275425b07a06bcdeb4aba9@epcas1p2.samsung.com>
2019-12-20 0:24 ` [PATCH v2 10/11] ARM: dts: exynos: Replace deprecated property for Exynos bus and DMC Chanwoo Choi
[not found] ` <CGME20191220001800epcas1p13d5f4ff181c10a118e151a86891a7130@epcas1p1.samsung.com>
2019-12-20 0:24 ` [PATCH v2 11/11] arm64: dts: exynos: Replace deprecated property for Exynos bus on TM2 Chanwoo Choi
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