[PATCH 1/3] gpio: tegra186: Allow optional irq parent callbacks

Marc Zyngier
2020-10-05T11:15:12Z

Make the tegra186 GPIO driver resistent to variable depth
interrupt hierarchy, which we are about to introduce.

No functionnal change yet.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
drivers/gpio/gpio-tegra186.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-tegra186.c b/drivers/gpio/gpio-tegra186.c
index 178e9128ded0..9500074b1f1b 100644
--- a/drivers/gpio/gpio-tegra186.c
+++ b/drivers/gpio/gpio-tegra186.c
@@ -430,7 +430,18 @@ static int tegra186_irq_set_type(struct irq_data *data, unsigned int type)
else
irq_set_handler_locked(data, handle_edge_irq);

- return irq_chip_set_type_parent(data, type);
+ if (data->parent_data)
+ return irq_chip_set_type_parent(data, type);
+
+ return 0;
+}
+
+static int tegra186_irq_set_wake(struct irq_data *data, unsigned int on)
+{
+ if (data->parent_data)
+ return irq_chip_set_wake_parent(data, on);
+
+ return 0;
}

static void tegra186_gpio_irq(struct irq_desc *desc)
@@ -678,7 +689,7 @@ static int tegra186_gpio_probe(struct platform_device *pdev)
gpio->intc.irq_mask = tegra186_irq_mask;
gpio->intc.irq_unmask = tegra186_irq_unmask;
gpio->intc.irq_set_type = tegra186_irq_set_type;
- gpio->intc.irq_set_wake = irq_chip_set_wake_parent;
+ gpio->intc.irq_set_wake = tegra186_irq_set_wake;

irq = &gpio->gpio.irq;
irq->chip = &gpio->intc;
--
2.28.0