forked from Minki/linux
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: Anton Vorontsov <cbou@mail.ru>
This commit is contained in:
Anton Vorontsov
parent
dffd28a13a
commit
bfde2662ae
@ -33,6 +33,16 @@ static struct resource *ac_irq, *usb_irq;
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static struct timer_list charger_timer;
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static struct timer_list supply_timer;
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enum {
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PDA_PSY_OFFLINE = 0,
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PDA_PSY_ONLINE = 1,
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PDA_PSY_TO_CHANGE,
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};
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static int new_ac_status = -1;
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static int new_usb_status = -1;
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static int ac_status = -1;
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static int usb_status = -1;
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static int pda_power_get_property(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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@ -61,36 +71,44 @@ static char *pda_power_supplied_to[] = {
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"backup-battery",
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};
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static struct power_supply pda_power_supplies[] = {
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{
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.name = "ac",
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.type = POWER_SUPPLY_TYPE_MAINS,
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.supplied_to = pda_power_supplied_to,
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.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
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.properties = pda_power_props,
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.num_properties = ARRAY_SIZE(pda_power_props),
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.get_property = pda_power_get_property,
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},
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{
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.name = "usb",
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.type = POWER_SUPPLY_TYPE_USB,
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.supplied_to = pda_power_supplied_to,
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.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
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.properties = pda_power_props,
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.num_properties = ARRAY_SIZE(pda_power_props),
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.get_property = pda_power_get_property,
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},
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static struct power_supply pda_psy_ac = {
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.name = "ac",
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.type = POWER_SUPPLY_TYPE_MAINS,
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.supplied_to = pda_power_supplied_to,
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.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
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.properties = pda_power_props,
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.num_properties = ARRAY_SIZE(pda_power_props),
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.get_property = pda_power_get_property,
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};
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static struct power_supply pda_psy_usb = {
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.name = "usb",
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.type = POWER_SUPPLY_TYPE_USB,
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.supplied_to = pda_power_supplied_to,
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.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
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.properties = pda_power_props,
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.num_properties = ARRAY_SIZE(pda_power_props),
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.get_property = pda_power_get_property,
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};
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static void update_status(void)
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{
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if (pdata->is_ac_online)
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new_ac_status = !!pdata->is_ac_online();
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if (pdata->is_usb_online)
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new_usb_status = !!pdata->is_usb_online();
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}
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static void update_charger(void)
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{
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if (!pdata->set_charge)
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return;
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if (pdata->is_ac_online && pdata->is_ac_online()) {
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if (new_ac_status > 0) {
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dev_dbg(dev, "charger on (AC)\n");
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pdata->set_charge(PDA_POWER_CHARGE_AC);
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} else if (pdata->is_usb_online && pdata->is_usb_online()) {
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} else if (new_usb_status > 0) {
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dev_dbg(dev, "charger on (USB)\n");
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pdata->set_charge(PDA_POWER_CHARGE_USB);
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} else {
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@ -99,31 +117,53 @@ static void update_charger(void)
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}
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}
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static void supply_timer_func(unsigned long power_supply_ptr)
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static void supply_timer_func(unsigned long unused)
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{
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void *power_supply = (void *)power_supply_ptr;
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if (ac_status == PDA_PSY_TO_CHANGE) {
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ac_status = new_ac_status;
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power_supply_changed(&pda_psy_ac);
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}
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power_supply_changed(power_supply);
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if (usb_status == PDA_PSY_TO_CHANGE) {
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usb_status = new_usb_status;
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power_supply_changed(&pda_psy_usb);
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}
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}
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static void charger_timer_func(unsigned long power_supply_ptr)
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static void psy_changed(void)
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{
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update_charger();
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/* Okay, charger set. Now wait a bit before notifying supplicants,
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* charge power should stabilize. */
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supply_timer.data = power_supply_ptr;
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/*
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* Okay, charger set. Now wait a bit before notifying supplicants,
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* charge power should stabilize.
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*/
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mod_timer(&supply_timer,
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jiffies + msecs_to_jiffies(pdata->wait_for_charger));
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}
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static void charger_timer_func(unsigned long unused)
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{
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update_status();
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psy_changed();
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}
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static irqreturn_t power_changed_isr(int irq, void *power_supply)
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{
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/* Wait a bit before reading ac/usb line status and setting charger,
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* because ac/usb status readings may lag from irq. */
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charger_timer.data = (unsigned long)power_supply;
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if (power_supply == &pda_psy_ac)
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ac_status = PDA_PSY_TO_CHANGE;
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else if (power_supply == &pda_psy_usb)
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usb_status = PDA_PSY_TO_CHANGE;
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else
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return IRQ_NONE;
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/*
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* Wait a bit before reading ac/usb line status and setting charger,
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* because ac/usb status readings may lag from irq.
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*/
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mod_timer(&charger_timer,
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jiffies + msecs_to_jiffies(pdata->wait_for_status));
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return IRQ_HANDLED;
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}
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@ -142,6 +182,7 @@ static int pda_power_probe(struct platform_device *pdev)
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pdata = pdev->dev.platform_data;
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update_status();
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update_charger();
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if (!pdata->wait_for_status)
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@ -155,31 +196,26 @@ static int pda_power_probe(struct platform_device *pdev)
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ac_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ac");
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usb_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "usb");
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if (!ac_irq && !usb_irq) {
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dev_err(dev, "no ac/usb irq specified\n");
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ret = -ENODEV;
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goto noirqs;
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}
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if (pdata->supplied_to) {
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pda_power_supplies[0].supplied_to = pdata->supplied_to;
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pda_power_supplies[1].supplied_to = pdata->supplied_to;
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pda_power_supplies[0].num_supplicants = pdata->num_supplicants;
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pda_power_supplies[1].num_supplicants = pdata->num_supplicants;
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pda_psy_ac.supplied_to = pdata->supplied_to;
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pda_psy_ac.num_supplicants = pdata->num_supplicants;
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pda_psy_usb.supplied_to = pdata->supplied_to;
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pda_psy_usb.num_supplicants = pdata->num_supplicants;
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}
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if (pdata->is_ac_online) {
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ret = power_supply_register(&pdev->dev, &pda_power_supplies[0]);
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ret = power_supply_register(&pdev->dev, &pda_psy_ac);
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if (ret) {
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dev_err(dev, "failed to register %s power supply\n",
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pda_power_supplies[0].name);
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pda_psy_ac.name);
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goto ac_supply_failed;
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}
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if (ac_irq) {
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ret = request_irq(ac_irq->start, power_changed_isr,
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get_irq_flags(ac_irq), ac_irq->name,
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&pda_power_supplies[0]);
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&pda_psy_ac);
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if (ret) {
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dev_err(dev, "request ac irq failed\n");
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goto ac_irq_failed;
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@ -188,18 +224,17 @@ static int pda_power_probe(struct platform_device *pdev)
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}
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if (pdata->is_usb_online) {
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ret = power_supply_register(&pdev->dev, &pda_power_supplies[1]);
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ret = power_supply_register(&pdev->dev, &pda_psy_usb);
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if (ret) {
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dev_err(dev, "failed to register %s power supply\n",
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pda_power_supplies[1].name);
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pda_psy_usb.name);
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goto usb_supply_failed;
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}
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if (usb_irq) {
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ret = request_irq(usb_irq->start, power_changed_isr,
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get_irq_flags(usb_irq),
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usb_irq->name,
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&pda_power_supplies[1]);
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usb_irq->name, &pda_psy_usb);
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if (ret) {
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dev_err(dev, "request usb irq failed\n");
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goto usb_irq_failed;
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@ -213,15 +248,14 @@ static int pda_power_probe(struct platform_device *pdev)
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usb_irq_failed:
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if (pdata->is_usb_online)
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power_supply_unregister(&pda_power_supplies[1]);
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power_supply_unregister(&pda_psy_usb);
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usb_supply_failed:
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if (pdata->is_ac_online && ac_irq)
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free_irq(ac_irq->start, &pda_power_supplies[0]);
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free_irq(ac_irq->start, &pda_psy_ac);
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ac_irq_failed:
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if (pdata->is_ac_online)
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power_supply_unregister(&pda_power_supplies[0]);
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power_supply_unregister(&pda_psy_ac);
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ac_supply_failed:
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noirqs:
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wrongid:
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return ret;
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}
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@ -229,15 +263,18 @@ wrongid:
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static int pda_power_remove(struct platform_device *pdev)
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{
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if (pdata->is_usb_online && usb_irq)
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free_irq(usb_irq->start, &pda_power_supplies[1]);
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free_irq(usb_irq->start, &pda_psy_usb);
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if (pdata->is_ac_online && ac_irq)
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free_irq(ac_irq->start, &pda_power_supplies[0]);
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free_irq(ac_irq->start, &pda_psy_ac);
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del_timer_sync(&charger_timer);
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del_timer_sync(&supply_timer);
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if (pdata->is_usb_online)
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power_supply_unregister(&pda_power_supplies[1]);
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power_supply_unregister(&pda_psy_usb);
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if (pdata->is_ac_online)
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power_supply_unregister(&pda_power_supplies[0]);
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power_supply_unregister(&pda_psy_ac);
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return 0;
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}
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