diff options
Diffstat (limited to 'drivers/power/pda_power.c')
| -rw-r--r-- | drivers/power/pda_power.c | 89 |
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"); |