6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Linus Walleij <linus.walleij@xxxxxxxxxx>
[ Upstream commit b4510f8fd5d0e9afa777f115871f5d522540c417 ]
Convert the driver to immutable irq-chip with a bit of
intuition.
Cc: Marc Zyngier <maz@xxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Reviewed-by: Marc Zyngier <maz@xxxxxxxxxx>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
Stable-dep-of: 9860370c2172 ("gpio: xilinx: Convert gpio_lock to raw spinlock")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpio/gpio-xilinx.c | 23 +++++++++++++++--------
1 file changed, 15 insertions(+), 8 deletions(-)
diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c
index 2fc6b6ff7f165..31f05c7d5915e 100644
--- a/drivers/gpio/gpio-xilinx.c
+++ b/drivers/gpio/gpio-xilinx.c
@@ -68,7 +68,6 @@ struct xgpio_instance {
DECLARE_BITMAP(dir, 64);
spinlock_t gpio_lock; /* For serializing operations */
int irq;
- struct irq_chip irqchip;
DECLARE_BITMAP(enable, 64);
DECLARE_BITMAP(rising_edge, 64);
DECLARE_BITMAP(falling_edge, 64);
@@ -416,6 +415,8 @@ static void xgpio_irq_mask(struct irq_data *irq_data)
xgpio_writereg(chip->regs + XGPIO_IPIER_OFFSET, temp);
}
spin_unlock_irqrestore(&chip->gpio_lock, flags);
+
+ gpiochip_disable_irq(&chip->gc, irq_offset);
}
/**
@@ -431,6 +432,8 @@ static void xgpio_irq_unmask(struct irq_data *irq_data)
u32 old_enable = xgpio_get_value32(chip->enable, bit);
u32 mask = BIT(bit / 32), val;
+ gpiochip_enable_irq(&chip->gc, irq_offset);
+
spin_lock_irqsave(&chip->gpio_lock, flags);
__set_bit(bit, chip->enable);
@@ -544,6 +547,16 @@ static void xgpio_irqhandler(struct irq_desc *desc)
chained_irq_exit(irqchip, desc);
}
+static const struct irq_chip xgpio_irq_chip = {
+ .name = "gpio-xilinx",
+ .irq_ack = xgpio_irq_ack,
+ .irq_mask = xgpio_irq_mask,
+ .irq_unmask = xgpio_irq_unmask,
+ .irq_set_type = xgpio_set_irq_type,
+ .flags = IRQCHIP_IMMUTABLE,
+ GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
/**
* xgpio_probe - Probe method for the GPIO device.
* @pdev: pointer to the platform device
@@ -664,12 +677,6 @@ static int xgpio_probe(struct platform_device *pdev)
if (chip->irq <= 0)
goto skip_irq;
- chip->irqchip.name = "gpio-xilinx";
- chip->irqchip.irq_ack = xgpio_irq_ack;
- chip->irqchip.irq_mask = xgpio_irq_mask;
- chip->irqchip.irq_unmask = xgpio_irq_unmask;
- chip->irqchip.irq_set_type = xgpio_set_irq_type;
-
/* Disable per-channel interrupts */
xgpio_writereg(chip->regs + XGPIO_IPIER_OFFSET, 0);
/* Clear any existing per-channel interrupts */
@@ -679,7 +686,7 @@ static int xgpio_probe(struct platform_device *pdev)
xgpio_writereg(chip->regs + XGPIO_GIER_OFFSET, XGPIO_GIER_IE);
girq = &chip->gc.irq;
- girq->chip = &chip->irqchip;
+ gpio_irq_chip_set_chip(girq, &xgpio_irq_chip);
girq->parent_handler = xgpio_irqhandler;
girq->num_parents = 1;
girq->parents = devm_kcalloc(&pdev->dev, 1,
--
2.39.5
