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authorLaxman Dewangan <ldewangan@nvidia.com>2016-05-20 18:10:26 +0300
committerMark Brown <broonie@kernel.org>2016-06-03 02:41:15 +0300
commitccc12561926c0bef9a40865db93b926a0927e93f (patch)
tree2034ef3c4af60b796092465a89cec69ff859f0a2 /drivers/base/regmap
parent1a695a905c18548062509178b98bc91e67510864 (diff)
downloadlinux-ccc12561926c0bef9a40865db93b926a0927e93f.tar.xz
regmap: irq: Add support to call client specific pre/post interrupt service
Regmap irq implements the generic interrupt service routine which is common for most of devices. Some devices, like MAX77620, MAX20024 needs the special handling before and after servicing the interrupt as generic. For the example, MAX77620 programming guidelines for interrupt servicing says: 1. When interrupt occurs from PMIC, mask the PMIC interrupt by setting GLBLM. 2. Read IRQTOP and service the interrupt accordingly. 3. Once all interrupts has been checked and serviced, the interrupt service routine un-masks the hardware interrupt line by clearing GLBLM. The step (2) is implemented in regmap irq as generic routine. For step (1) and (3), add callbacks from regmap irq to client driver to handle chip specific configurations. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/base/regmap')
-rw-r--r--drivers/base/regmap/regmap-irq.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 26f799e71c82..ec262476d043 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -268,13 +268,16 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
bool handled = false;
u32 reg;
+ if (chip->handle_pre_irq)
+ chip->handle_pre_irq(chip->irq_drv_data);
+
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);
pm_runtime_put(map->dev);
- return IRQ_NONE;
+ goto exit;
}
}
@@ -296,7 +299,7 @@ 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);
- return IRQ_NONE;
+ goto exit;
}
for (i = 0; i < data->chip->num_regs; i++) {
@@ -312,7 +315,7 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
break;
default:
BUG();
- return IRQ_NONE;
+ goto exit;
}
}
@@ -329,7 +332,7 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
ret);
if (chip->runtime_pm)
pm_runtime_put(map->dev);
- return IRQ_NONE;
+ goto exit;
}
}
}
@@ -365,6 +368,10 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
if (chip->runtime_pm)
pm_runtime_put(map->dev);
+exit:
+ if (chip->handle_post_irq)
+ chip->handle_post_irq(chip->irq_drv_data);
+
if (handled)
return IRQ_HANDLED;
else