On Mon, May 02, 2016 at 03:18:52PM +0300, Roger Quadros wrote:
> The OTG controller and the USB controller an be linked via the
Typo?
Others are ok for me.
Acked-by: Peter Chen <peter.chen@xxxxxxx>
> '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@xxxxxx>
> ---
> Documentation/devicetree/bindings/usb/generic.txt | 3 +++
> drivers/usb/common/common.c | 27 +++++++++++++++++++++++
> include/linux/usb/of.h | 9 ++++++++
> 3 files changed, 39 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/usb/generic.txt b/Documentation/devicetree/bindings/usb/generic.txt
> index bba8257..f6866c1 100644
> --- a/Documentation/devicetree/bindings/usb/generic.txt
> +++ b/Documentation/devicetree/bindings/usb/generic.txt
> @@ -24,6 +24,9 @@ Optional properties:
> optional for OTG device.
> - adp-disable: tells OTG controllers we want to disable OTG ADP, ADP is
> optional for OTG device.
> + - otg-controller: phandle to otg controller. Host or gadget controllers can
> + contain this property to link it to a particular OTG
> + controller.
>
> This is an attribute to a USB controller such as:
>
> 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
> + *
> + * 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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--
Best Regards,
Peter Chen
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