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Date: Thu, 7 Apr 2016 19:48:45 +0800 From: Baolin Wang <baolin.wang@...aro.org> To: balbi@...nel.org, gregkh@...uxfoundation.org, sre@...nel.org, dbaryshkov@...il.com, dwmw2@...radead.org Cc: peter.chen@...escale.com, stern@...land.harvard.edu, r.baldyga@...sung.com, yoshihiro.shimoda.uh@...esas.com, lee.jones@...aro.org, broonie@...nel.org, ckeepax@...nsource.wolfsonmicro.com, patches@...nsource.wolfsonmicro.com, baolin.wang@...aro.org, linux-pm@...r.kernel.org, linux-usb@...r.kernel.org, device-mainlining@...ts.linuxfoundation.org, linux-kernel@...r.kernel.org Subject: [PATCH v10 3/4] gadget: Integrate with the usb gadget supporting for usb charger When the usb gadget supporting for usb charger is ready, the usb charger can implement the usb_charger_plug_by_gadget() function and usb_charger_exit() function by getting 'struct usb_charger' from 'struct gadget'. Signed-off-by: Baolin Wang <baolin.wang@...aro.org> --- drivers/usb/gadget/udc/charger.c | 39 +++++++++++++++++++++++++++++++++++++- 1 file changed, 38 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc/charger.c b/drivers/usb/gadget/udc/charger.c index e24cb0a..ee711cd 100644 --- a/drivers/usb/gadget/udc/charger.c +++ b/drivers/usb/gadget/udc/charger.c @@ -527,6 +527,30 @@ usb_charger_plug_by_extcon(struct notifier_block *nb, int usb_charger_plug_by_gadget(struct usb_gadget *gadget, unsigned long state) { + struct usb_charger *uchger = gadget->charger; + enum usb_charger_state uchger_state; + + if (WARN(!uchger, "charger can not be NULL")) + return -EINVAL; + + /* + * Report event to power to setting the current limitation + * for this usb charger when one usb charger state is changed + * with detecting by usb gadget state. + */ + if (uchger->old_gadget_state != state) { + uchger->old_gadget_state = state; + + if (state >= USB_STATE_ATTACHED) + uchger_state = USB_CHARGER_PRESENT; + else if (state == USB_STATE_NOTATTACHED) + uchger_state = USB_CHARGER_REMOVE; + else + uchger_state = USB_CHARGER_DEFAULT; + + usb_charger_notify_others(uchger, uchger_state); + } + return 0; } EXPORT_SYMBOL_GPL(usb_charger_plug_by_gadget); @@ -683,6 +707,7 @@ int usb_charger_init(struct usb_gadget *ugadget) /* register a notifier on a usb gadget device */ uchger->gadget = ugadget; + ugadget->charger = uchger; uchger->old_gadget_state = ugadget->state; /* register a new usb charger */ @@ -703,7 +728,19 @@ fail: int usb_charger_exit(struct usb_gadget *ugadget) { - return 0; + struct usb_charger *uchger = ugadget->charger; + + if (WARN(!uchger, "charger can not be NULL")) + return -EINVAL; + + if (uchger->extcon_dev) + extcon_unregister_notifier(uchger->extcon_dev, + EXTCON_USB, + &uchger->extcon_nb.nb); + + ida_simple_remove(&usb_charger_ida, uchger->id); + + return usb_charger_unregister(uchger); } static int __init usb_charger_class_init(void) -- 1.7.9.5
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