From: Quanyang Wang <quanyang.w...@windriver.com>
When an gpio pin is requested as "eirq" in dts file as following:
pmic {
...
interrupt-parent = <&gpio>;
interrupts = <35 IRQ_TYPE_EDGE_FALLING>;
...
};
the direction of this pin should be set as "input" by calling
siul2_gpio_dir_in. Unfortunately, the function siul2_gpio_dir_in
is using mutex_lock/unlock(), so it can't be called in irq_unmask
or irq_set_type. The irq_chip::irq_request_resources callback isn't
running under the atomic context, it's safe to call siul2_gpio_dir_in.
Signed-off-by: Quanyang Wang <quanyang.w...@windriver.com>
---
Hi Bruce,
Would you please help merge this patch to the branches:
v6.1/standard/preempt-rt/nxp-sdk-5.15/nxp-s32g
v6.1/standard/nxp-sdk-5.15/nxp-s32g
Thanks,
Quanyang
---
drivers/gpio/gpio-siul2-s32cc.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-siul2-s32cc.c b/drivers/gpio/gpio-siul2-s32cc.c
index aed63d3a0fdbf..041c182374297 100644
--- a/drivers/gpio/gpio-siul2-s32cc.c
+++ b/drivers/gpio/gpio-siul2-s32cc.c
@@ -401,6 +401,22 @@ static int siul2_gpio_irq_set_type(struct irq_data *d,
unsigned int type)
return ret;
}
+static int suil2_gpio_irq_reqres(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ int ret;
+
+ ret = siul2_gpio_dir_in(gc, gpio);
+ if (ret) {
+ dev_err(gc->parent, "Failed to configure GPIO %lu as input\n",
+ gpio);
+ return ret;
+ }
+
+ return gpiochip_reqres_irq(gc, d->hwirq);
+}
+
static irqreturn_t siul2_gpio_irq_handler(int irq, void *data)
{
struct siul2_gpio_dev *gpio_dev = data;
@@ -1116,8 +1132,9 @@ static const struct irq_chip siul2_irqchip = {
.irq_mask = siul2_gpio_irq_mask,
.irq_unmask = siul2_gpio_irq_unmask,
.irq_set_type = siul2_gpio_irq_set_type,
+ .irq_request_resources = suil2_gpio_irq_reqres,
+ .irq_release_resources = gpiochip_irq_relres,
.flags = IRQCHIP_IMMUTABLE,
- GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static int siul2_gpio_probe(struct platform_device *pdev)
--
2.36.1
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