[PATCH v8 3/4] gadget: Integrate with the usb gadget supporting for usb charger

Baolin Wang
2016-03-24T12:37:02Z

When the usb gadget supporting for usb charger is ready, the usb charger
should get the type by the 'get_charger_type' callback which is implemented
by the usb gadget operations, and get the usb charger pointer from struct
'usb_gadget'.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
drivers/usb/gadget/charger.c | 43 ++++++++++++++++++++++++++++++++++++++++--
1 file changed, 41 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/charger.c b/drivers/usb/gadget/charger.c
index 861c144..b02c842 100644
--- a/drivers/usb/gadget/charger.c
+++ b/drivers/usb/gadget/charger.c
@@ -278,7 +278,11 @@ EXPORT_SYMBOL_GPL(usb_charger_unregister_notify);
enum usb_charger_type
usb_charger_detect_type(struct usb_charger *uchger)
{
- if (uchger->psy) {
+ if (uchger->gadget && uchger->gadget->ops
+ && uchger->gadget->ops->get_charger_type) {
+ uchger->type =
+ uchger->gadget->ops->get_charger_type(uchger->gadget);
+ } else if (uchger->psy) {
union power_supply_propval val;

power_supply_get_property(uchger->psy,
@@ -485,6 +489,29 @@ 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 (!uchger)
+ 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);
@@ -641,6 +668,7 @@ 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 */
@@ -661,7 +689,18 @@ fail:

int usb_charger_exit(struct usb_gadget *ugadget)
{
- return 0;
+ struct usb_charger *uchger = ugadget->charger;
+
+ if (!uchger)
+ 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_sysfs_init(void)
--
1.7.9.5