pda_power: implement polling

Signed-off-by: Anton Vorontsov <cbou@mail.ru>

diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c
index d6c6dbc..c8aa55b 100644 (file)
--- a/drivers/power/pda_power.c
+++ b/drivers/power/pda_power.c
@@ -32,6 +32,8 @@ static struct pda_power_pdata *pdata;
 static struct resource *ac_irq, *usb_irq;
 static struct timer_list charger_timer;
 static struct timer_list supply_timer;
+static struct timer_list polling_timer;
+static int polling;
 
 enum {
        PDA_PSY_OFFLINE = 0,
@@ -167,6 +169,31 @@ static irqreturn_t power_changed_isr(int irq, void *power_supply)
        return IRQ_HANDLED;
 }
 
+static void polling_timer_func(unsigned long unused)
+{
+       int changed = 0;
+
+       dev_dbg(dev, "polling...\n");
+
+       update_status();
+
+       if (!ac_irq && new_ac_status != ac_status) {
+               ac_status = PDA_PSY_TO_CHANGE;
+               changed = 1;
+       }
+
+       if (!usb_irq && new_usb_status != usb_status) {
+               usb_status = PDA_PSY_TO_CHANGE;
+               changed = 1;
+       }
+
+       if (changed)
+               psy_changed();
+
+       mod_timer(&polling_timer,
+                 jiffies + msecs_to_jiffies(pdata->polling_interval));
+}
+
 static int pda_power_probe(struct platform_device *pdev)
 {
        int ret = 0;
@@ -191,6 +218,9 @@ static int pda_power_probe(struct platform_device *pdev)
        if (!pdata->wait_for_charger)
                pdata->wait_for_charger = 500;
 
+       if (!pdata->polling_interval)
+               pdata->polling_interval = 2000;
+
        setup_timer(&charger_timer, charger_timer_func, 0);
        setup_timer(&supply_timer, supply_timer_func, 0);
 
@@ -220,6 +250,8 @@ static int pda_power_probe(struct platform_device *pdev)
                                dev_err(dev, "request ac irq failed\n");
                                goto ac_irq_failed;
                        }
+               } else {
+                       polling = 1;
                }
        }
 
@@ -239,10 +271,20 @@ static int pda_power_probe(struct platform_device *pdev)
                                dev_err(dev, "request usb irq failed\n");
                                goto usb_irq_failed;
                        }
+               } else {
+                       polling = 1;
                }
        }
 
-       device_init_wakeup(&pdev->dev, 1);
+       if (polling) {
+               dev_dbg(dev, "will poll for status\n");
+               setup_timer(&polling_timer, polling_timer_func, 0);
+               mod_timer(&polling_timer,
+                         jiffies + msecs_to_jiffies(pdata->polling_interval));
+       }
+
+       if (ac_irq || usb_irq)
+               device_init_wakeup(&pdev->dev, 1);
 
        return 0;
 
@@ -267,6 +309,8 @@ static int pda_power_remove(struct platform_device *pdev)
        if (pdata->is_ac_online && ac_irq)
                free_irq(ac_irq->start, &pda_psy_ac);
 
+       if (polling)
+               del_timer_sync(&polling_timer);
        del_timer_sync(&charger_timer);
        del_timer_sync(&supply_timer);
 

diff --git a/include/linux/pda_power.h b/include/linux/pda_power.h
index 1375f15..225beb1 100644 (file)
--- a/include/linux/pda_power.h
+++ b/include/linux/pda_power.h
@@ -26,6 +26,7 @@ struct pda_power_pdata {
 
        unsigned int wait_for_status; /* msecs, default is 500 */
        unsigned int wait_for_charger; /* msecs, default is 500 */
+       unsigned int polling_interval; /* msecs, default is 2000 */
 };
 
 #endif /* __PDA_POWER_H__ */