power_supply: tps65217-charger: Add support for IRQs

Make use of IRQ resources defined in tps65217 mfd code. If they are valid
we use them instead separate poll task, in order to define AC power state.

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

diff --git a/drivers/power/supply/tps65217_charger.c b/drivers/power/supply/tps65217_charger.c
index 73dfae41def8a659978eec9a738448f604cb1973..c8c4a0c1dca533c4c965bd645d52cb434203d6fd 100644 (file)
--- a/drivers/power/supply/tps65217_charger.c
+++ b/drivers/power/supply/tps65217_charger.c
@@ -46,6 +46,8 @@ struct tps65217_charger {
        int     prev_ac_online;
 
        struct task_struct      *poll_task;
+
+       int     irq;
 };
 
 static enum power_supply_property tps65217_ac_props[] = {
@@ -198,6 +200,7 @@ static int tps65217_charger_probe(struct platform_device *pdev)
        struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
        struct tps65217_charger *charger;
        struct power_supply_config cfg = {};
+       int irq;
        int ret;
 
        dev_dbg(&pdev->dev, "%s\n", __func__);
@@ -220,18 +223,40 @@ static int tps65217_charger_probe(struct platform_device *pdev)
                return PTR_ERR(charger->ac);
        }
 
+       irq = platform_get_irq_byname(pdev, "AC");
+       if (irq < 0)
+               irq = -ENXIO;
+       charger->irq = irq;
+
        ret = tps65217_config_charger(charger);
        if (ret < 0) {
                dev_err(charger->dev, "charger config failed, err %d\n", ret);
                return ret;
        }
 
-       charger->poll_task = kthread_run(tps65217_charger_poll_task,
-                                     charger, "ktps65217charger");
-       if (IS_ERR(charger->poll_task)) {
-               ret = PTR_ERR(charger->poll_task);
-               dev_err(charger->dev, "Unable to run kthread err %d\n", ret);
-               return ret;
+       if (irq != -ENXIO) {
+               ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+                                               tps65217_charger_irq,
+                                               0, "tps65217-charger",
+                                               charger);
+               if (ret) {
+                       dev_err(charger->dev,
+                               "Unable to register irq %d err %d\n", irq,
+                               ret);
+                       return ret;
+               }
+
+               /* Check current state */
+               tps65217_charger_irq(irq, charger);
+       } else {
+               charger->poll_task = kthread_run(tps65217_charger_poll_task,
+                                               charger, "ktps65217charger");
+               if (IS_ERR(charger->poll_task)) {
+                       ret = PTR_ERR(charger->poll_task);
+                       dev_err(charger->dev,
+                               "Unable to run kthread err %d\n", ret);
+                       return ret;
+               }
        }
 
        return 0;
@@ -241,7 +266,8 @@ static int tps65217_charger_remove(struct platform_device *pdev)
 {
        struct tps65217_charger *charger = platform_get_drvdata(pdev);
 
-       kthread_stop(charger->poll_task);
+       if (charger->irq == -ENXIO)
+               kthread_stop(charger->poll_task);
 
        return 0;
 }