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SubjectRe: [PATCH v2 02/11] PM / devfreq: Remove devfreq_get_devfreq_by_phandle function
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Hi Chanwoo,

On 12/20/19 12:24 AM, Chanwoo Choi wrote:
> Previously, devfreq core support 'devfreq' property in order to get
> the devfreq device by phandle. But, 'devfreq' property name is not proper
> on devicetree binding because this name doesn't mean the any h/w attribute.
>
> The devfreq core hand over the right to decide the property name
> for getting the devfreq device on devicetree. Each devfreq driver
> will decide the property name on devicetree binding and then get
> the devfreq device by using devfreq_get_devfreq_by_node().
>
> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
> ---
> drivers/devfreq/devfreq.c | 35 -----------------------------------
> drivers/devfreq/exynos-bus.c | 12 +++++++++++-
> include/linux/devfreq.h | 8 --------
> 3 files changed, 11 insertions(+), 44 deletions(-)
>
> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
> index cb8ca81c8973..c3d3c7c802a0 100644
> --- a/drivers/devfreq/devfreq.c
> +++ b/drivers/devfreq/devfreq.c
> @@ -991,48 +991,13 @@ struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node)
>
> return ERR_PTR(-ENODEV);
> }
> -
> -/*
> - * 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);
> -
> - devfreq = devfreq_get_devfreq_by_node(node);
> - of_node_put(node);
> -
> - 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);
>
> /**
> * devm_devfreq_remove_device() - Resource-managed devfreq_remove_device()
> diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
> index 7f5917d59072..1bc4e3c81115 100644
> --- a/drivers/devfreq/exynos-bus.c
> +++ b/drivers/devfreq/exynos-bus.c
> @@ -86,6 +86,16 @@ static int exynos_bus_get_event(struct exynos_bus *bus,
> return ret;
> }
>
> +static struct devfreq *exynos_bus_get_parent_devfreq(struct device_node *np)
> +{
> + struct device_node *node = of_parse_phandle(np, "devfreq", 0);
> +
> + if (!node)
> + return ERR_PTR(-ENODEV);
> +
> + return devfreq_get_devfreq_by_node(node);
> +}
> +
> /*
> * devfreq function for both simple-ondemand and passive governor
> */
> @@ -353,7 +363,7 @@ static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
> profile->exit = exynos_bus_passive_exit;
>
> /* Get the instance of parent devfreq device */
> - parent_devfreq = devfreq_get_devfreq_by_phandle(dev, 0);
> + parent_devfreq = exynos_bus_get_parent_devfreq(dev->of_node);
> if (IS_ERR(parent_devfreq))
> return -EPROBE_DEFER;
>

These changes won't apply, probably I need some base for it.

Regards,
Lukasz

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