[v10,09/14] usb: of: add an API to get OTG device from USB controller node

The OTG controller and the USB controller can be linked via the
'otg-controller' property in the USB controller's device node.

of_usb_get_otg() can be used to get the OTG controller device
from the USB controller's device node.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Peter Chen <peter.chen@nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/usb/generic.txt |  3 +++
 drivers/usb/common/common.c                       | 27 +++++++++++++++++++++++
 include/linux/usb/of.h                            |  9 ++++++++
 3 files changed, 39 insertions(+)

Hi

> diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
> index e3d0161..d7ec471 100644
> --- a/drivers/usb/common/common.c
> +++ b/drivers/usb/common/common.c
> @@ -238,6 +238,33 @@ int of_usb_update_otg_caps(struct device_node *np,  }
> EXPORT_SYMBOL_GPL(of_usb_update_otg_caps);
> 
> +#ifdef CONFIG_USB_OTG
> +/**
> + * of_usb_get_otg - get the OTG controller linked to the USB controller
> + * @np: Pointer to the device_node of the USB controller
> + * @otg_caps: Pointer to the target usb_otg_caps to be set

Remove otg_caps.

Li Jun

> + *
> + * Returns the OTG controller device or NULL on error.
> + */
> +struct device *of_usb_get_otg(struct device_node *np) {
> +	struct device_node *otg_np;
> +	struct platform_device *pdev;
> +
> +	otg_np = of_parse_phandle(np, "otg-controller", 0);
> +	if (!otg_np)
> +		return NULL;
> +
> +	pdev = of_find_device_by_node(otg_np);
> +	of_node_put(otg_np);
> +	if (!pdev)
> +		return NULL;
> +
> +	return &pdev->dev;
> +}
> +EXPORT_SYMBOL_GPL(of_usb_get_otg);
> +#endif
> +
>  #endif
> 
>  MODULE_LICENSE("GPL");
> diff --git a/include/linux/usb/of.h b/include/linux/usb/of.h index
> de3237f..499a4e8 100644
> --- a/include/linux/usb/of.h
> +++ b/include/linux/usb/of.h
> @@ -40,6 +40,15 @@ static inline struct device_node
> *usb_of_get_child_node  }  #endif
> 
> +#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_USB_OTG) struct device
> +*of_usb_get_otg(struct device_node *np); #else static inline struct
> +device *of_usb_get_otg(struct device_node *np) {
> +	return NULL;
> +}
> +#endif
> +
>  #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_USB_SUPPORT)  enum
> usb_phy_interface of_usb_get_phy_mode(struct device_node *np);  #else
> --
> 2.7.4

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On 13/06/16 11:13, Jun Li wrote:
> Hi
> 
>> diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
>> index e3d0161..d7ec471 100644
>> --- a/drivers/usb/common/common.c
>> +++ b/drivers/usb/common/common.c
>> @@ -238,6 +238,33 @@ int of_usb_update_otg_caps(struct device_node *np,  }
>> EXPORT_SYMBOL_GPL(of_usb_update_otg_caps);
>>
>> +#ifdef CONFIG_USB_OTG
>> +/**
>> + * of_usb_get_otg - get the OTG controller linked to the USB controller
>> + * @np: Pointer to the device_node of the USB controller
>> + * @otg_caps: Pointer to the target usb_otg_caps to be set
> 
> Remove otg_caps.

Sure.

> 
>> + *
>> + * Returns the OTG controller device or NULL on error.
>> + */
>> +struct device *of_usb_get_otg(struct device_node *np) {
>> +	struct device_node *otg_np;
>> +	struct platform_device *pdev;
>> +
>> +	otg_np = of_parse_phandle(np, "otg-controller", 0);
>> +	if (!otg_np)
>> +		return NULL;
>> +
>> +	pdev = of_find_device_by_node(otg_np);
>> +	of_node_put(otg_np);
>> +	if (!pdev)
>> +		return NULL;
>> +
>> +	return &pdev->dev;
>> +}
>> +EXPORT_SYMBOL_GPL(of_usb_get_otg);
>> +#endif
>> +
>>  #endif
>>
>>  MODULE_LICENSE("GPL");
>> diff --git a/include/linux/usb/of.h b/include/linux/usb/of.h index
>> de3237f..499a4e8 100644
>> --- a/include/linux/usb/of.h
>> +++ b/include/linux/usb/of.h
>> @@ -40,6 +40,15 @@ static inline struct device_node
>> *usb_of_get_child_node  }  #endif
>>
>> +#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_USB_OTG) struct device
>> +*of_usb_get_otg(struct device_node *np); #else static inline struct
>> +device *of_usb_get_otg(struct device_node *np) {
>> +	return NULL;
>> +}
>> +#endif
>> +
>>  #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_USB_SUPPORT)  enum
>> usb_phy_interface of_usb_get_phy_mode(struct device_node *np);  #else
>> --
>> 2.7.4
> 

--
cheers,
-roger
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