Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756837AbcJSCi3 (ORCPT ); Tue, 18 Oct 2016 22:38:29 -0400 Received: from mail-pf0-f175.google.com ([209.85.192.175]:36293 "EHLO mail-pf0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756594AbcJSCiN (ORCPT ); Tue, 18 Oct 2016 22:38:13 -0400 From: Baolin Wang To: balbi@kernel.org, gregkh@linuxfoundation.org, sre@kernel.org, dbaryshkov@gmail.com, dwmw2@infradead.org Cc: robh@kernel.org, jun.li@nxp.com, m.szyprowski@samsung.com, ruslan.bilovol@gmail.com, peter.chen@freescale.com, stern@rowland.harvard.edu, grygorii.strashko@ti.com, yoshihiro.shimoda.uh@renesas.com, lee.jones@linaro.org, broonie@kernel.org, john.stultz@linaro.org, neilb@suse.com, ckeepax@opensource.wolfsonmicro.com, patches@opensource.wolfsonmicro.com, baolin.wang@linaro.org, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, device-mainlining@lists.linuxfoundation.org, linux-kernel@vger.kernel.org Subject: [PATCH v18 2/4] usb: gadget: Support for the usb charger framework Date: Wed, 19 Oct 2016 10:37:35 +0800 Message-Id: X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3777 Lines: 122 For supporting the usb charger, it adds the usb_charger_init() and usb_charger_exit() functions for usb charger initialization and exit. It will report to the usb charger when the gadget state is changed, then the usb charger can do the power things. Signed-off-by: Baolin Wang Reviewed-by: Li Jun Tested-by: Li Jun --- drivers/usb/gadget/udc/core.c | 19 ++++++++++++++++++- include/linux/usb/gadget.h | 3 +++ 2 files changed, 21 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c index 9483489..90df022 100644 --- a/drivers/usb/gadget/udc/core.c +++ b/drivers/usb/gadget/udc/core.c @@ -25,6 +25,7 @@ #include #include +#include #include #include #include @@ -576,12 +577,17 @@ EXPORT_SYMBOL_GPL(usb_gadget_vbus_connect); * reporting how much power the device may consume. For example, this * could affect how quickly batteries are recharged. * + * It will also notify the USB charger how much power the device may + * consume if there is a USB charger linking with the gadget. + * * Returns zero on success, else negative errno. */ int usb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA) { int ret = 0; + usb_charger_set_cur_limit_by_gadget(gadget, mA); + if (!gadget->ops->vbus_draw) { ret = -EOPNOTSUPP; goto out; @@ -963,6 +969,9 @@ static void usb_gadget_state_work(struct work_struct *work) struct usb_gadget *gadget = work_to_gadget(work); struct usb_udc *udc = gadget->udc; + /* when the gadget state is changed, then report to USB charger */ + usb_charger_plug_by_gadget(gadget, gadget->state); + if (udc) sysfs_notify(&udc->dev.kobj, NULL, "state"); } @@ -1132,6 +1141,10 @@ int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget, if (ret) goto err4; + ret = usb_charger_init(gadget); + if (ret) + goto err5; + usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED); udc->vbus = true; @@ -1143,7 +1156,7 @@ int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget, if (ret != -EPROBE_DEFER) list_del(&driver->pending); if (ret) - goto err5; + goto err6; break; } } @@ -1152,6 +1165,9 @@ int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget, return 0; +err6: + usb_charger_exit(gadget); + err5: device_del(&udc->dev); @@ -1263,6 +1279,7 @@ void usb_del_gadget_udc(struct usb_gadget *gadget) kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE); flush_work(&gadget->work); device_unregister(&udc->dev); + usb_charger_exit(gadget); device_unregister(&gadget->dev); } EXPORT_SYMBOL_GPL(usb_del_gadget_udc); diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 8e81f9e..82a0d63 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -24,6 +24,7 @@ #include #include #include +#include #define UDC_TRACE_STR_MAX 512 @@ -328,6 +329,7 @@ struct usb_gadget_ops { * @in_epnum: last used in ep number * @mA: last set mA value * @otg_caps: OTG capabilities of this gadget. + * @charger: Negotiate the power with the usb charger. * @sg_supported: true if we can handle scatter-gather * @is_otg: True if the USB device port uses a Mini-AB jack, so that the * gadget driver must provide a USB OTG descriptor. @@ -387,6 +389,7 @@ struct usb_gadget { unsigned in_epnum; unsigned mA; struct usb_otg_caps *otg_caps; + struct usb_charger *charger; unsigned sg_supported:1; unsigned is_otg:1; -- 1.7.9.5