v3.19.8-ckt17 -stable review patch. If anyone has any objections, please let
me know.
---8<------------------------------------------------------------
From: Geert Uytterhoeven <geert+rene...@glider.be>
commit b26a719bdba9aa926ceaadecc66e07623d2b8a53 upstream.
The R-Car GPIO driver handles Runtime PM for requested GPIOs only.
When using a GPIO purely as an interrupt source, no Runtime PM handling
is done, and the GPIO module's clock may not be enabled.
To fix this:
- Add .irq_request_resources() and .irq_release_resources() callbacks
to handle Runtime PM when an interrupt is requested,
- Add irq_bus_lock() and sync_unlock() callbacks to handle Runtime PM
when e.g. disabling/enabling an interrupt, or configuring the
interrupt type.
Fixes: d5c3d84657db57bd "net: phy: Avoid polling PHY with PHY_IGNORE_INTERRUPTS"
Signed-off-by: Geert Uytterhoeven <geert+rene...@glider.be>
Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
[ luis: backported to 3.16:
- use gpio_to_priv() instead of gpiochip_get_data()
- adjusted context ]
Signed-off-by: Luis Henriques <luis.henriq...@canonical.com>
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
---
drivers/gpio/gpio-rcar.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index 584484e..e2b370e 100644
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -187,6 +187,44 @@ static inline struct gpio_rcar_priv *gpio_to_priv(struct
gpio_chip *chip)
return container_of(chip, struct gpio_rcar_priv, gpio_chip);
}
+static void gpio_rcar_irq_bus_lock(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct gpio_rcar_priv *p = gpio_to_priv(gc);
+
+ pm_runtime_get_sync(&p->pdev->dev);
+}
+
+static void gpio_rcar_irq_bus_sync_unlock(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct gpio_rcar_priv *p = gpio_to_priv(gc);
+
+ pm_runtime_put(&p->pdev->dev);
+}
+
+
+static int gpio_rcar_irq_request_resources(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct gpio_rcar_priv *p = gpio_to_priv(gc);
+ int error;
+
+ error = pm_runtime_get_sync(&p->pdev->dev);
+ if (error < 0)
+ return error;
+
+ return 0;
+}
+
+static void gpio_rcar_irq_release_resources(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct gpio_rcar_priv *p = gpio_to_priv(gc);
+
+ pm_runtime_put(&p->pdev->dev);
+}
+
static void gpio_rcar_config_general_input_output_mode(struct gpio_chip *chip,
unsigned int gpio,
bool output)
@@ -425,6 +463,10 @@ static int gpio_rcar_probe(struct platform_device *pdev)
irq_chip->irq_mask = gpio_rcar_irq_disable;
irq_chip->irq_unmask = gpio_rcar_irq_enable;
irq_chip->irq_set_type = gpio_rcar_irq_set_type;
+ irq_chip->irq_bus_lock = gpio_rcar_irq_bus_lock;
+ irq_chip->irq_bus_sync_unlock = gpio_rcar_irq_bus_sync_unlock;
+ irq_chip->irq_request_resources = gpio_rcar_irq_request_resources;
+ irq_chip->irq_release_resources = gpio_rcar_irq_release_resources;
irq_chip->flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_SET_TYPE_MASKED
| IRQCHIP_MASK_ON_SUSPEND;
--
2.7.0
