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Commit bfde2662 authored by Anton Vorontsov's avatar Anton Vorontsov
Browse files

pda_power: various cleanups 



- handle spurious interrupts correctly;
- get rid of pda_power_supplies array, use two variables instead;
- factor out psy_changed() function, it will be used for polling.

Signed-off-by: default avatarAnton Vorontsov <cbou@mail.ru>
parent dffd28a1

drivers/power/pda_power.c

+92 −55
Original line number Diff line number Diff line
@@ -33,6 +33,16 @@ static struct resource *ac_irq, *usb_irq; 
static struct timer_list charger_timer;

static struct timer_list supply_timer;



enum {

	PDA_PSY_OFFLINE = 0,

	PDA_PSY_ONLINE = 1,

	PDA_PSY_TO_CHANGE,

};

static int new_ac_status = -1;

static int new_usb_status = -1;

static int ac_status = -1;

static int usb_status = -1;



static int pda_power_get_property(struct power_supply *psy,

				  enum power_supply_property psp,

				  union power_supply_propval *val)
@@ -61,8 +71,7 @@ static char *pda_power_supplied_to[] = { 
	"backup-battery",

};



static struct power_supply pda_power_supplies[] = {

	{

static struct power_supply pda_psy_ac = {

	.name = "ac",

	.type = POWER_SUPPLY_TYPE_MAINS,

	.supplied_to = pda_power_supplied_to,
@@ -70,8 +79,9 @@ static struct power_supply pda_power_supplies[] = { 
	.properties = pda_power_props,

	.num_properties = ARRAY_SIZE(pda_power_props),

	.get_property = pda_power_get_property,

	},

	{

};



static struct power_supply pda_psy_usb = {

	.name = "usb",

	.type = POWER_SUPPLY_TYPE_USB,

	.supplied_to = pda_power_supplied_to,
@@ -79,18 +89,26 @@ static struct power_supply pda_power_supplies[] = { 
	.properties = pda_power_props,

	.num_properties = ARRAY_SIZE(pda_power_props),

	.get_property = pda_power_get_property,

	},

};



static void update_status(void)

{

	if (pdata->is_ac_online)

		new_ac_status = !!pdata->is_ac_online();



	if (pdata->is_usb_online)

		new_usb_status = !!pdata->is_usb_online();

}



static void update_charger(void)

{

	if (!pdata->set_charge)

		return;



	if (pdata->is_ac_online && pdata->is_ac_online()) {

	if (new_ac_status > 0) {

		dev_dbg(dev, "charger on (AC)\n");

		pdata->set_charge(PDA_POWER_CHARGE_AC);

	} else if (pdata->is_usb_online && pdata->is_usb_online()) {

	} else if (new_usb_status > 0) {

		dev_dbg(dev, "charger on (USB)\n");

		pdata->set_charge(PDA_POWER_CHARGE_USB);

	} else {
@@ -99,31 +117,53 @@ static void update_charger(void) 
	}

}



static void supply_timer_func(unsigned long power_supply_ptr)

static void supply_timer_func(unsigned long unused)

{

	void *power_supply = (void *)power_supply_ptr;

	if (ac_status == PDA_PSY_TO_CHANGE) {

		ac_status = new_ac_status;

		power_supply_changed(&pda_psy_ac);

	}



	power_supply_changed(power_supply);

	if (usb_status == PDA_PSY_TO_CHANGE) {

		usb_status = new_usb_status;

		power_supply_changed(&pda_psy_usb);

	}

}



static void charger_timer_func(unsigned long power_supply_ptr)

static void psy_changed(void)

{

	update_charger();



	/* Okay, charger set. Now wait a bit before notifying supplicants,

	 * charge power should stabilize. */

	supply_timer.data = power_supply_ptr;

	/*

	 * Okay, charger set. Now wait a bit before notifying supplicants,

	 * charge power should stabilize.

	 */

	mod_timer(&supply_timer,

		  jiffies + msecs_to_jiffies(pdata->wait_for_charger));

}



static void charger_timer_func(unsigned long unused)

{

	update_status();

	psy_changed();

}



static irqreturn_t power_changed_isr(int irq, void *power_supply)

{

	/* Wait a bit before reading ac/usb line status and setting charger,

	 * because ac/usb status readings may lag from irq. */

	charger_timer.data = (unsigned long)power_supply;

	if (power_supply == &pda_psy_ac)

		ac_status = PDA_PSY_TO_CHANGE;

	else if (power_supply == &pda_psy_usb)

		usb_status = PDA_PSY_TO_CHANGE;

	else

		return IRQ_NONE;



	/*

	 * 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 IRQ_HANDLED;

}
@@ -142,6 +182,7 @@ static int pda_power_probe(struct platform_device *pdev) 


	pdata = pdev->dev.platform_data;



	update_status();

	update_charger();



	if (!pdata->wait_for_status)
@@ -155,31 +196,26 @@ static int pda_power_probe(struct platform_device *pdev) 


	ac_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ac");

	usb_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "usb");

	if (!ac_irq && !usb_irq) {

		dev_err(dev, "no ac/usb irq specified\n");

		ret = -ENODEV;

		goto noirqs;

	}



	if (pdata->supplied_to) {

		pda_power_supplies[0].supplied_to = pdata->supplied_to;

		pda_power_supplies[1].supplied_to = pdata->supplied_to;

		pda_power_supplies[0].num_supplicants = pdata->num_supplicants;

		pda_power_supplies[1].num_supplicants = pdata->num_supplicants;

		pda_psy_ac.supplied_to = pdata->supplied_to;

		pda_psy_ac.num_supplicants = pdata->num_supplicants;

		pda_psy_usb.supplied_to = pdata->supplied_to;

		pda_psy_usb.num_supplicants = pdata->num_supplicants;

	}



	if (pdata->is_ac_online) {

		ret = power_supply_register(&pdev->dev, &pda_power_supplies[0]);

		ret = power_supply_register(&pdev->dev, &pda_psy_ac);

		if (ret) {

			dev_err(dev, "failed to register %s power supply\n",

				pda_power_supplies[0].name);

				pda_psy_ac.name);

			goto ac_supply_failed;

		}



		if (ac_irq) {

			ret = request_irq(ac_irq->start, power_changed_isr,

					  get_irq_flags(ac_irq), ac_irq->name,

					  &pda_power_supplies[0]);

					  &pda_psy_ac);

			if (ret) {

				dev_err(dev, "request ac irq failed\n");

				goto ac_irq_failed;
@@ -188,18 +224,17 @@ static int pda_power_probe(struct platform_device *pdev) 
	}



	if (pdata->is_usb_online) {

		ret = power_supply_register(&pdev->dev, &pda_power_supplies[1]);

		ret = power_supply_register(&pdev->dev, &pda_psy_usb);

		if (ret) {

			dev_err(dev, "failed to register %s power supply\n",

				pda_power_supplies[1].name);

				pda_psy_usb.name);

			goto usb_supply_failed;

		}



		if (usb_irq) {

			ret = request_irq(usb_irq->start, power_changed_isr,

					  get_irq_flags(usb_irq),

					  usb_irq->name,

					  &pda_power_supplies[1]);

					  usb_irq->name, &pda_psy_usb);

			if (ret) {

				dev_err(dev, "request usb irq failed\n");

				goto usb_irq_failed;
@@ -213,15 +248,14 @@ static int pda_power_probe(struct platform_device *pdev) 


usb_irq_failed:

	if (pdata->is_usb_online)

		power_supply_unregister(&pda_power_supplies[1]);

		power_supply_unregister(&pda_psy_usb);

usb_supply_failed:

	if (pdata->is_ac_online && ac_irq)

		free_irq(ac_irq->start, &pda_power_supplies[0]);

		free_irq(ac_irq->start, &pda_psy_ac);

ac_irq_failed:

	if (pdata->is_ac_online)

		power_supply_unregister(&pda_power_supplies[0]);

		power_supply_unregister(&pda_psy_ac);

ac_supply_failed:

noirqs:

wrongid:

	return ret;

}
@@ -229,15 +263,18 @@ static int pda_power_probe(struct platform_device *pdev) 
static int pda_power_remove(struct platform_device *pdev)

{

	if (pdata->is_usb_online && usb_irq)

		free_irq(usb_irq->start, &pda_power_supplies[1]);

		free_irq(usb_irq->start, &pda_psy_usb);

	if (pdata->is_ac_online && ac_irq)

		free_irq(ac_irq->start, &pda_power_supplies[0]);

		free_irq(ac_irq->start, &pda_psy_ac);



	del_timer_sync(&charger_timer);

	del_timer_sync(&supply_timer);



	if (pdata->is_usb_online)

		power_supply_unregister(&pda_power_supplies[1]);

		power_supply_unregister(&pda_psy_usb);

	if (pdata->is_ac_online)

		power_supply_unregister(&pda_power_supplies[0]);

		power_supply_unregister(&pda_psy_ac);



	return 0;

}