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-rw-r--r--drivers/mfd/arizona-irq.c66
-rw-r--r--include/linux/mfd/arizona/pdata.h3
2 files changed, 56 insertions, 13 deletions
diff --git a/drivers/mfd/arizona-irq.c b/drivers/mfd/arizona-irq.c
index aa25468d24aa..f761cc119c01 100644
--- a/drivers/mfd/arizona-irq.c
+++ b/drivers/mfd/arizona-irq.c
@@ -94,6 +94,7 @@ static irqreturn_t arizona_ctrlif_err(int irq, void *data)
static irqreturn_t arizona_irq_thread(int irq, void *data)
{
struct arizona *arizona = data;
+ bool poll;
unsigned int val;
int ret;
@@ -103,20 +104,39 @@ static irqreturn_t arizona_irq_thread(int irq, void *data)
return IRQ_NONE;
}
- /* Always handle the AoD domain */
- handle_nested_irq(irq_find_mapping(arizona->virq, 0));
+ do {
+ poll = false;
+
+ /* Always handle the AoD domain */
+ handle_nested_irq(irq_find_mapping(arizona->virq, 0));
+
+ /*
+ * Check if one of the main interrupts is asserted and only
+ * check that domain if it is.
+ */
+ ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS,
+ &val);
+ if (ret == 0 && val & ARIZONA_IRQ1_STS) {
+ handle_nested_irq(irq_find_mapping(arizona->virq, 1));
+ } else if (ret != 0) {
+ dev_err(arizona->dev,
+ "Failed to read main IRQ status: %d\n", ret);
+ }
- /*
- * Check if one of the main interrupts is asserted and only
- * check that domain if it is.
- */
- ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS, &val);
- if (ret == 0 && val & ARIZONA_IRQ1_STS) {
- handle_nested_irq(irq_find_mapping(arizona->virq, 1));
- } else if (ret != 0) {
- dev_err(arizona->dev, "Failed to read main IRQ status: %d\n",
- ret);
- }
+ /*
+ * Poll the IRQ pin status to see if we're really done
+ * if the interrupt controller can't do it for us.
+ */
+ if (!arizona->pdata.irq_gpio) {
+ break;
+ } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_RISING &&
+ gpio_get_value_cansleep(arizona->pdata.irq_gpio)) {
+ poll = true;
+ } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_FALLING &&
+ !gpio_get_value_cansleep(arizona->pdata.irq_gpio)) {
+ poll = true;
+ }
+ } while (poll);
pm_runtime_mark_last_busy(arizona->dev);
pm_runtime_put_autosuspend(arizona->dev);
@@ -262,6 +282,26 @@ int arizona_irq_init(struct arizona *arizona)
}
}
+ /* Used to emulate edge trigger and to work around broken pinmux */
+ if (arizona->pdata.irq_gpio) {
+ if (gpio_to_irq(arizona->pdata.irq_gpio) != arizona->irq) {
+ dev_warn(arizona->dev, "IRQ %d is not GPIO %d (%d)\n",
+ arizona->irq, arizona->pdata.irq_gpio,
+ gpio_to_irq(arizona->pdata.irq_gpio));
+ arizona->irq = gpio_to_irq(arizona->pdata.irq_gpio);
+ }
+
+ ret = devm_gpio_request_one(arizona->dev,
+ arizona->pdata.irq_gpio,
+ GPIOF_IN, "arizona IRQ");
+ if (ret != 0) {
+ dev_err(arizona->dev,
+ "Failed to request IRQ GPIO %d:: %d\n",
+ arizona->pdata.irq_gpio, ret);
+ arizona->pdata.irq_gpio = 0;
+ }
+ }
+
ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread,
flags, "arizona", arizona);
diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h
index 84fefede3a23..8755dd05ab78 100644
--- a/include/linux/mfd/arizona/pdata.h
+++ b/include/linux/mfd/arizona/pdata.h
@@ -163,6 +163,9 @@ struct arizona_pdata {
/** Haptic actuator type */
unsigned int hap_act;
+
+ /** GPIO for primary IRQ (used for edge triggered emulation) */
+ int irq_gpio;
};
#endif