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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.c136
1 files changed, 94 insertions, 42 deletions
diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c
index a232de6a570..0c52e2a0d90 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>
@@ -23,11 +24,7 @@
static inline unsigned int get_irq_flags(struct resource *res)
{
- unsigned int flags = IRQF_SAMPLE_RANDOM | IRQF_SHARED;
-
- flags |= res->flags & IRQF_TRIGGER_MASK;
-
- return flags;
+ return IRQF_SHARED | (res->flags & IRQF_TRIGGER_MASK);
}
static struct device *dev;
@@ -38,9 +35,11 @@ static struct timer_list supply_timer;
static struct timer_list polling_timer;
static int polling;
-#ifdef CONFIG_USB_OTG_UTILS
-static struct otg_transceiver *transceiver;
+#if IS_ENABLED(CONFIG_USB_PHY)
+static struct usb_phy *transceiver;
+static struct notifier_block otg_nb;
#endif
+
static struct regulator *ac_draw;
enum {
@@ -131,13 +130,13 @@ static void update_charger(void)
regulator_set_current_limit(ac_draw, max_uA, max_uA);
if (!regulator_enabled) {
dev_dbg(dev, "charger on (AC)\n");
- regulator_enable(ac_draw);
+ WARN_ON(regulator_enable(ac_draw));
regulator_enabled = 1;
}
} else {
if (regulator_enabled) {
dev_dbg(dev, "charger off\n");
- regulator_disable(ac_draw);
+ WARN_ON(regulator_disable(ac_draw));
regulator_enabled = 0;
}
}
@@ -219,10 +218,45 @@ static void polling_timer_func(unsigned long unused)
jiffies + msecs_to_jiffies(pdata->polling_interval));
}
-#ifdef CONFIG_USB_OTG_UTILS
+#if IS_ENABLED(CONFIG_USB_PHY)
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
@@ -247,6 +281,12 @@ static int pda_power_probe(struct platform_device *pdev)
goto init_failed;
}
+ ac_draw = regulator_get(dev, "ac_draw");
+ if (IS_ERR(ac_draw)) {
+ dev_dbg(dev, "couldn't get ac_draw regulator\n");
+ ac_draw = NULL;
+ }
+
update_status();
update_charger();
@@ -275,12 +315,15 @@ static int pda_power_probe(struct platform_device *pdev)
pda_psy_usb.num_supplicants = pdata->num_supplicants;
}
- ac_draw = regulator_get(dev, "ac_draw");
- if (IS_ERR(ac_draw)) {
- dev_dbg(dev, "couldn't get ac_draw regulator\n");
- ac_draw = NULL;
- ret = PTR_ERR(ac_draw);
+#if IS_ENABLED(CONFIG_USB_PHY)
+ transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
+ if (!IS_ERR_OR_NULL(transceiver)) {
+ if (!pdata->is_usb_online)
+ pdata->is_usb_online = otg_is_usb_online;
+ if (!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);
@@ -303,13 +346,6 @@ 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 +367,18 @@ static int pda_power_probe(struct platform_device *pdev)
}
}
+#if IS_ENABLED(CONFIG_USB_PHY)
+ if (!IS_ERR_OR_NULL(transceiver) && pdata->use_otg_notifier) {
+ otg_nb.notifier_call = otg_handle_notification;
+ ret = usb_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);
@@ -343,15 +391,20 @@ static int pda_power_probe(struct platform_device *pdev)
return 0;
+#if IS_ENABLED(CONFIG_USB_PHY)
+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);
usb_supply_failed:
if (pdata->is_ac_online && ac_irq)
free_irq(ac_irq->start, &pda_psy_ac);
-#ifdef CONFIG_USB_OTG_UTILS
- if (transceiver)
- otg_put_transceiver(transceiver);
+#if IS_ENABLED(CONFIG_USB_PHY)
+ if (!IS_ERR_OR_NULL(transceiver))
+ usb_put_phy(transceiver);
#endif
ac_irq_failed:
if (pdata->is_ac_online)
@@ -384,9 +437,9 @@ static int pda_power_remove(struct platform_device *pdev)
power_supply_unregister(&pda_psy_usb);
if (pdata->is_ac_online)
power_supply_unregister(&pda_psy_ac);
-#ifdef CONFIG_USB_OTG_UTILS
- if (transceiver)
- otg_put_transceiver(transceiver);
+#if IS_ENABLED(CONFIG_USB_PHY)
+ if (!IS_ERR_OR_NULL(transceiver))
+ usb_put_phy(transceiver);
#endif
if (ac_draw) {
regulator_put(ac_draw);
@@ -404,6 +457,13 @@ static int usb_wakeup_enabled;
static int pda_power_suspend(struct platform_device *pdev, pm_message_t state)
{
+ if (pdata->suspend) {
+ int ret = pdata->suspend(state);
+
+ if (ret)
+ return ret;
+ }
+
if (device_may_wakeup(&pdev->dev)) {
if (ac_irq)
ac_wakeup_enabled = !enable_irq_wake(ac_irq->start);
@@ -423,6 +483,9 @@ static int pda_power_resume(struct platform_device *pdev)
disable_irq_wake(ac_irq->start);
}
+ if (pdata->resume)
+ return pdata->resume();
+
return 0;
}
#else
@@ -430,8 +493,6 @@ 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",
@@ -442,17 +503,8 @@ 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");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 14:24:32 +0000