The driver uses runtime PM to leverage low power techniques. For
use-cases using GPIO as interrupt the device needs to be in an
appropriate state.
Reported-by: John Linn <li...@xilinx.com>
Signed-off-by: Soren Brinkmann <soren.brinkm...@xilinx.com>
Tested-by: John Linn <li...@xilinx.com>
---
drivers/gpio/gpio-zynq.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c
index 8abeacac5885..0d1669416112 100644
--- a/drivers/gpio/gpio-zynq.c
+++ b/drivers/gpio/gpio-zynq.c
@@ -471,6 +471,22 @@ static int zynq_gpio_set_wake(struct irq_data *data,
unsigned int on)
return 0;
}
+int zynq_gpio_irq_request_resources(struct irq_data *data)
+{
+ struct zynq_gpio *gpio = irq_data_get_irq_chip_data(data);
+ struct device *dev = gpio->chip.dev;
+
+ return pm_runtime_get_sync(dev);
+}
+
+void zynq_gpio_irq_release_resources(struct irq_data *data)
+{
+ struct zynq_gpio *gpio = irq_data_get_irq_chip_data(data);
+ struct device *dev = gpio->chip.dev;
+
+ pm_runtime_put(dev);
+}
+
/* irq chip descriptor */
static struct irq_chip zynq_gpio_level_irqchip = {
.name = DRIVER_NAME,
@@ -480,6 +496,8 @@ static struct irq_chip zynq_gpio_level_irqchip = {
.irq_unmask = zynq_gpio_irq_unmask,
.irq_set_type = zynq_gpio_set_irq_type,
.irq_set_wake = zynq_gpio_set_wake,
+ .irq_request_resources = zynq_gpio_irq_request_resources,
+ .irq_release_resources = zynq_gpio_irq_release_resources,
.flags = IRQCHIP_EOI_THREADED | IRQCHIP_EOI_IF_HANDLED |
IRQCHIP_MASK_ON_SUSPEND,
};
@@ -492,6 +510,8 @@ static struct irq_chip zynq_gpio_edge_irqchip = {
.irq_unmask = zynq_gpio_irq_unmask,
.irq_set_type = zynq_gpio_set_irq_type,
.irq_set_wake = zynq_gpio_set_wake,
+ .irq_request_resources = zynq_gpio_irq_request_resources,
+ .irq_release_resources = zynq_gpio_irq_release_resources,
.flags = IRQCHIP_MASK_ON_SUSPEND,
};
--
2.6.2.3.ga463a5b
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