From 3080de4ef62f0cc1910b227d33d3533f3c4a4a5d Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Tue, 21 Aug 2012 20:02:03 +0100 Subject: 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: Mark Brown Signed-off-by: Samuel Ortiz --- drivers/mfd/arizona-irq.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) (limited to 'drivers/mfd/arizona-irq.c') diff --git a/drivers/mfd/arizona-irq.c b/drivers/mfd/arizona-irq.c index 64940c6..a062153 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; + 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); -- cgit v1.1