From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753309AbcEMKF5 (ORCPT ); Fri, 13 May 2016 06:05:57 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:60614 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753093AbcEMKEi (ORCPT ); Fri, 13 May 2016 06:04:38 -0400 From: Roger Quadros To: CC: , , , , , , , , , , , , , , , , , Roger Quadros Subject: [PATCH v8 09/14] usb: of: add an API to get OTG device from USB controller node Date: Fri, 13 May 2016 13:03:23 +0300 Message-ID: <1463133808-10630-10-git-send-email-rogerq@ti.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1463133808-10630-1-git-send-email-rogerq@ti.com> References: <1463133808-10630-1-git-send-email-rogerq@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Acked-by: Peter Chen --- 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