Messages in this thread Patch in this message | | | Date | Fri, 4 Jan 2008 03:32:43 +0300 | From | Anton Vorontsov <> | Subject | [PATCH 2/2] pda_power: implement polling |
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Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com> ---
Untested, just to show the idea.
drivers/power/pda_power.c | 40 ++++++++++++++++++++++++++++++++++++++++ include/linux/pda_power.h | 1 + 2 files changed, 41 insertions(+), 0 deletions(-)
diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c index 153e3b1..8e9aec3 100644 --- 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, @@ -166,6 +168,28 @@ 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_vdbg(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(); +} + static int pda_power_probe(struct platform_device *pdev) { int ret = 0; @@ -190,6 +214,9 @@ 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); @@ -219,6 +246,8 @@ static int pda_power_probe(struct platform_device *pdev) dev_err(dev, "request ac irq failed\n"); goto ac_irq_failed; } + } else { + polling = 1; } } @@ -238,9 +267,18 @@ static int pda_power_probe(struct platform_device *pdev) dev_err(dev, "request usb irq failed\n"); goto usb_irq_failed; } + } else { + polling = 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)); + } + return 0; usb_irq_failed: @@ -264,6 +302,8 @@ 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 --- 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__ */ -- 1.5.2.4
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