diff options
author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-07-24 14:41:19 (GMT) |
---|---|---|
committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-08-07 19:29:45 (GMT) |
commit | 0c00c50b41a9a6ee83eb16fb5c6c22e5115391b8 (patch) | |
tree | 12a30d730032a46fac0793fea2ba30ef900b4d4f /drivers/base/regmap | |
parent | 40052ca0c243d101cfadd65936f60ef81df10b02 (diff) | |
download | linux-0c00c50b41a9a6ee83eb16fb5c6c22e5115391b8.tar.xz |
regmap: irq: Enable devices for runtime PM while handling interrupts
Some devices need to have a runtime PM reference while handling interrupts
to ensure that the register I/O is available. Support this with a flag in
the chip.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/base/regmap')
-rw-r--r-- | drivers/base/regmap/regmap-irq.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c index 6f8f0c1..bb5e103 100644 --- a/drivers/base/regmap/regmap-irq.c +++ b/drivers/base/regmap/regmap-irq.c @@ -16,6 +16,7 @@ #include <linux/irq.h> #include <linux/interrupt.h> #include <linux/irqdomain.h> +#include <linux/pm_runtime.h> #include <linux/slab.h> #include "internal.h" @@ -62,6 +63,13 @@ static void regmap_irq_sync_unlock(struct irq_data *data) int i, ret; u32 reg; + if (d->chip->runtime_pm) { + ret = pm_runtime_get_sync(map->dev); + if (ret < 0) + dev_err(map->dev, "IRQ sync failed to resume: %d\n", + ret); + } + /* * If there's been a change in the mask write it back to the * hardware. We rely on the use of the regmap core cache to @@ -77,6 +85,9 @@ static void regmap_irq_sync_unlock(struct irq_data *data) reg); } + if (d->chip->runtime_pm) + pm_runtime_put(map->dev); + /* If we've changed our wakeup count propagate it to the parent */ if (d->wake_count < 0) for (i = d->wake_count; i < 0; i++) @@ -147,6 +158,15 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) bool handled = false; u32 reg; + if (chip->runtime_pm) { + ret = pm_runtime_get_sync(map->dev); + if (ret < 0) { + dev_err(map->dev, "IRQ thread failed to resume: %d\n", + ret); + return IRQ_NONE; + } + } + /* * Ignore masked IRQs and ack if we need to; we ack early so * there is no race between handling and acknowleding the @@ -162,6 +182,8 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) if (ret != 0) { dev_err(map->dev, "Failed to read IRQ status: %d\n", ret); + if (chip->runtime_pm) + pm_runtime_put(map->dev); return IRQ_NONE; } @@ -185,6 +207,9 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) } } + if (chip->runtime_pm) + pm_runtime_put(map->dev); + if (handled) return IRQ_HANDLED; else |