diff options
| author | Ludovic Desroches <ludovic.desroches@microchip.com> | 2018-09-13 14:42:13 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-25 15:53:58 +0100 |
| commit | 1a66e50c45e6abb6fc14509a44d2eb210f7f2957 (patch) | |
| tree | 99daaf19f3feb67140b1cf5d5e26d11b5afc509c /drivers/pinctrl | |
| parent | a05541487b89f3f8e475bce6f57543a64e13228d (diff) | |
pinctrl: at91: don't use the same irqchip with multiple gpiochips
[ Upstream commit 0c3dfa176912b5f87732545598200fb55e9c1978 ]
Sharing the same irqchip with multiple gpiochips is not a good
practice. For instance, when installing hooks, we change the state
of the irqchip. The initial state of the irqchip for the second
gpiochip to register is then disrupted.
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/pinctrl-at91.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c index 0d2fc0cff35e..52bbd34f7d0d 100644 --- a/drivers/pinctrl/pinctrl-at91.c +++ b/drivers/pinctrl/pinctrl-at91.c @@ -1556,16 +1556,6 @@ void at91_pinctrl_gpio_resume(void) #define gpio_irq_set_wake NULL #endif /* CONFIG_PM */ -static struct irq_chip gpio_irqchip = { - .name = "GPIO", - .irq_ack = gpio_irq_ack, - .irq_disable = gpio_irq_mask, - .irq_mask = gpio_irq_mask, - .irq_unmask = gpio_irq_unmask, - /* .irq_set_type is set dynamically */ - .irq_set_wake = gpio_irq_set_wake, -}; - static void gpio_irq_handler(struct irq_desc *desc) { struct irq_chip *chip = irq_desc_get_chip(desc); @@ -1608,12 +1598,22 @@ static int at91_gpio_of_irq_setup(struct platform_device *pdev, struct gpio_chip *gpiochip_prev = NULL; struct at91_gpio_chip *prev = NULL; struct irq_data *d = irq_get_irq_data(at91_gpio->pioc_virq); + struct irq_chip *gpio_irqchip; int ret, i; + gpio_irqchip = devm_kzalloc(&pdev->dev, sizeof(*gpio_irqchip), GFP_KERNEL); + if (!gpio_irqchip) + return -ENOMEM; + at91_gpio->pioc_hwirq = irqd_to_hwirq(d); - /* Setup proper .irq_set_type function */ - gpio_irqchip.irq_set_type = at91_gpio->ops->irq_type; + gpio_irqchip->name = "GPIO"; + gpio_irqchip->irq_ack = gpio_irq_ack; + gpio_irqchip->irq_disable = gpio_irq_mask; + gpio_irqchip->irq_mask = gpio_irq_mask; + gpio_irqchip->irq_unmask = gpio_irq_unmask; + gpio_irqchip->irq_set_wake = gpio_irq_set_wake, + gpio_irqchip->irq_set_type = at91_gpio->ops->irq_type; /* Disable irqs of this PIO controller */ writel_relaxed(~0, at91_gpio->regbase + PIO_IDR); @@ -1624,7 +1624,7 @@ static int at91_gpio_of_irq_setup(struct platform_device *pdev, * interrupt. */ ret = gpiochip_irqchip_add(&at91_gpio->chip, - &gpio_irqchip, + gpio_irqchip, 0, handle_edge_irq, IRQ_TYPE_EDGE_BOTH); @@ -1642,7 +1642,7 @@ static int at91_gpio_of_irq_setup(struct platform_device *pdev, if (!gpiochip_prev) { /* Then register the chain on the parent IRQ */ gpiochip_set_chained_irqchip(&at91_gpio->chip, - &gpio_irqchip, + gpio_irqchip, at91_gpio->pioc_virq, gpio_irq_handler); return 0; |