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path: root/drivers/power/pda_power.c
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Diffstat (limited to 'drivers/power/pda_power.c')
-rw-r--r--drivers/power/pda_power.c89
1 files changed, 68 insertions, 21 deletions
diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c
index 69f8aa3a6a4b..fd49689738af 100644
--- a/drivers/power/pda_power.c
+++ b/drivers/power/pda_power.c
@@ -14,6 +14,7 @@
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/interrupt.h>
+#include <linux/notifier.h>
#include <linux/power_supply.h>
#include <linux/pda_power.h>
#include <linux/regulator/consumer.h>
@@ -40,7 +41,9 @@ static int polling;
#ifdef CONFIG_USB_OTG_UTILS
static struct otg_transceiver *transceiver;
+static struct notifier_block otg_nb;
#endif
+
static struct regulator *ac_draw;
enum {
@@ -222,7 +225,42 @@ static void polling_timer_func(unsigned long unused)
#ifdef CONFIG_USB_OTG_UTILS
static int otg_is_usb_online(void)
{
- return (transceiver->state == OTG_STATE_B_PERIPHERAL);
+ return (transceiver->last_event == USB_EVENT_VBUS ||
+ transceiver->last_event == USB_EVENT_ENUMERATED);
+}
+
+static int otg_is_ac_online(void)
+{
+ return (transceiver->last_event == USB_EVENT_CHARGER);
+}
+
+static int otg_handle_notification(struct notifier_block *nb,
+ unsigned long event, void *unused)
+{
+ switch (event) {
+ case USB_EVENT_CHARGER:
+ ac_status = PDA_PSY_TO_CHANGE;
+ break;
+ case USB_EVENT_VBUS:
+ case USB_EVENT_ENUMERATED:
+ usb_status = PDA_PSY_TO_CHANGE;
+ break;
+ case USB_EVENT_NONE:
+ ac_status = PDA_PSY_TO_CHANGE;
+ usb_status = PDA_PSY_TO_CHANGE;
+ break;
+ default:
+ return NOTIFY_OK;
+ }
+
+ /*
+ * Wait a bit before reading ac/usb line status and setting charger,
+ * because ac/usb status readings may lag from irq.
+ */
+ mod_timer(&charger_timer,
+ jiffies + msecs_to_jiffies(pdata->wait_for_status));
+
+ return NOTIFY_OK;
}
#endif
@@ -282,6 +320,16 @@ static int pda_power_probe(struct platform_device *pdev)
ret = PTR_ERR(ac_draw);
}
+#ifdef CONFIG_USB_OTG_UTILS
+ transceiver = otg_get_transceiver();
+ if (transceiver && !pdata->is_usb_online) {
+ pdata->is_usb_online = otg_is_usb_online;
+ }
+ if (transceiver && !pdata->is_ac_online) {
+ pdata->is_ac_online = otg_is_ac_online;
+ }
+#endif
+
if (pdata->is_ac_online) {
ret = power_supply_register(&pdev->dev, &pda_psy_ac);
if (ret) {
@@ -303,13 +351,6 @@ static int pda_power_probe(struct platform_device *pdev)
}
}
-#ifdef CONFIG_USB_OTG_UTILS
- transceiver = otg_get_transceiver();
- if (transceiver && !pdata->is_usb_online) {
- pdata->is_usb_online = otg_is_usb_online;
- }
-#endif
-
if (pdata->is_usb_online) {
ret = power_supply_register(&pdev->dev, &pda_psy_usb);
if (ret) {
@@ -331,6 +372,18 @@ static int pda_power_probe(struct platform_device *pdev)
}
}
+#ifdef CONFIG_USB_OTG_UTILS
+ if (transceiver && pdata->use_otg_notifier) {
+ otg_nb.notifier_call = otg_handle_notification;
+ ret = otg_register_notifier(transceiver, &otg_nb);
+ if (ret) {
+ dev_err(dev, "failure to register otg notifier\n");
+ goto otg_reg_notifier_failed;
+ }
+ polling = 0;
+ }
+#endif
+
if (polling) {
dev_dbg(dev, "will poll for status\n");
setup_timer(&polling_timer, polling_timer_func, 0);
@@ -343,6 +396,11 @@ static int pda_power_probe(struct platform_device *pdev)
return 0;
+#ifdef CONFIG_USB_OTG_UTILS
+otg_reg_notifier_failed:
+ if (pdata->is_usb_online && usb_irq)
+ free_irq(usb_irq->start, &pda_psy_usb);
+#endif
usb_irq_failed:
if (pdata->is_usb_online)
power_supply_unregister(&pda_psy_usb);
@@ -440,8 +498,6 @@ static int pda_power_resume(struct platform_device *pdev)
#define pda_power_resume NULL
#endif /* CONFIG_PM */
-MODULE_ALIAS("platform:pda-power");
-
static struct platform_driver pda_power_pdrv = {
.driver = {
.name = "pda-power",
@@ -452,17 +508,8 @@ static struct platform_driver pda_power_pdrv = {
.resume = pda_power_resume,
};
-static int __init pda_power_init(void)
-{
- return platform_driver_register(&pda_power_pdrv);
-}
+module_platform_driver(pda_power_pdrv);
-static void __exit pda_power_exit(void)
-{
- platform_driver_unregister(&pda_power_pdrv);
-}
-
-module_init(pda_power_init);
-module_exit(pda_power_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Anton Vorontsov <cbou@mail.ru>");
+MODULE_ALIAS("platform:pda-power");