Commit 3080de4e authored by Mark Brown's avatar Mark Brown Committed by Samuel Ortiz
Browse files

mfd: arizona: Suppress needless calls to the primary IRQ 



We can read back if the primary IRQ is asserted from the register map,
meaning that we can suppress polling of the interrupt status registers
when only the AoD IRQ domain is asserting.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 55692af5

drivers/mfd/arizona-irq.c

+15 −3
Original line number Diff line number Diff line
@@ -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;

	unsigned int val;

	int i, ret;



	ret = pm_runtime_get_sync(arizona->dev);
@@ -102,9 +103,20 @@ static irqreturn_t arizona_irq_thread(int irq, void *data) 
		return IRQ_NONE;

	}



	/* Check both domains */

	for (i = 0; i < 2; i++)

		handle_nested_irq(irq_find_mapping(arizona->virq, i));

	/* 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);

	}



	pm_runtime_mark_last_busy(arizona->dev);

	pm_runtime_put_autosuspend(arizona->dev);

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