On 12/16/2022 12:17 PM, Cixi Geng wrote:
From: Cixi Geng <cixi.geng1@xxxxxxxxxx>
Kernel warns about mutable irq_chips:
"not an immutable chip, please consider fixing!"
Make the struct irq_chip const, flag it as IRQCHIP_IMMUTABLE, add the
new helper functions, and call the appropriate gpiolib functions.
Please split them into 3 patches and each patch converts one driver,
which is easy to review.
Signed-off-by: Cixi Geng <cixi.geng1@xxxxxxxxxx>
---
drivers/gpio/gpio-eic-sprd.c | 4 ++--
drivers/gpio/gpio-pmic-eic-sprd.c | 4 ++--
drivers/gpio/gpio-sprd.c | 11 +++++++++--
3 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
index 8d722e026e9c..07b9099f2a6d 100644
--- a/drivers/gpio/gpio-eic-sprd.c
+++ b/drivers/gpio/gpio-eic-sprd.c
@@ -631,10 +631,10 @@ static int sprd_eic_probe(struct platform_device *pdev)
sprd_eic->intc.irq_mask = sprd_eic_irq_mask;
sprd_eic->intc.irq_unmask = sprd_eic_irq_unmask;
sprd_eic->intc.irq_set_type = sprd_eic_irq_set_type;
- sprd_eic->intc.flags = IRQCHIP_SKIP_SET_WAKE;
+ sprd_eic->intc.flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE;
irq = &sprd_eic->chip.irq;
- irq->chip = &sprd_eic->intc;
+ gpio_irq_chip_set_chip(irq, &sprd_eic->intc);
irq->handler = handle_bad_irq;
irq->default_type = IRQ_TYPE_NONE;
irq->parent_handler = sprd_eic_irq_handler;
diff --git a/drivers/gpio/gpio-pmic-eic-sprd.c b/drivers/gpio/gpio-pmic-eic-sprd.c
index e518490c4b68..d96604ea10e7 100644
--- a/drivers/gpio/gpio-pmic-eic-sprd.c
+++ b/drivers/gpio/gpio-pmic-eic-sprd.c
@@ -344,10 +344,10 @@ static int sprd_pmic_eic_probe(struct platform_device *pdev)
pmic_eic->intc.irq_set_type = sprd_pmic_eic_irq_set_type;
pmic_eic->intc.irq_bus_lock = sprd_pmic_eic_bus_lock;
pmic_eic->intc.irq_bus_sync_unlock = sprd_pmic_eic_bus_sync_unlock;
- pmic_eic->intc.flags = IRQCHIP_SKIP_SET_WAKE;
+ pmic_eic->intc.flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE;
Why not add GPIOCHIP_IRQ_RESOURCE_HELPERS for above 2 drivers? Seems we
can remove the irq_chip from pmic_eic structure, instead we can define
it statically with adding GPIOCHIP_IRQ_RESOURCE_HELPERS like other patch
[1] did?
[1] https://lore.kernel.org/all/20220419141846.598305-6-maz@xxxxxxxxxx/
irq = &pmic_eic->chip.irq;
- irq->chip = &pmic_eic->intc;
+ gpio_irq_chip_set_chip(irq, &pmic_eic->intc);
irq->threaded = true;
ret = devm_gpiochip_add_data(&pdev->dev, &pmic_eic->chip, pmic_eic);
diff --git a/drivers/gpio/gpio-sprd.c b/drivers/gpio/gpio-sprd.c
index 9bff63990eee..8398f9707ec0 100644
--- a/drivers/gpio/gpio-sprd.c
+++ b/drivers/gpio/gpio-sprd.c
@@ -64,6 +64,11 @@ static void sprd_gpio_update(struct gpio_chip *chip, unsigned int offset,
writel_relaxed(tmp, base + reg);
spin_unlock_irqrestore(&sprd_gpio->lock, flags);
+
+ if (reg == SPRD_GPIO_IE && val == 1)
+ gpiochip_enable_irq(chip, offset);
+ else if (reg == SPRD_GPIO_IE && val == 0)
+ gpiochip_disable_irq(chip, offset);
Looks incorrect to me, IIUC you should move
gpiochip_enable_irq/gpiochip_disable_irq() into sprd_gpio_irq_mask() and
sprd_gpio_irq_unmask().
}
static int sprd_gpio_read(struct gpio_chip *chip, unsigned int offset, u16 reg)
@@ -205,13 +210,15 @@ static void sprd_gpio_irq_handler(struct irq_desc *desc)
chained_irq_exit(ic, desc);
}
-static struct irq_chip sprd_gpio_irqchip = {
+static const struct irq_chip sprd_gpio_irqchip = {
.name = "sprd-gpio",
.irq_ack = sprd_gpio_irq_ack,
.irq_mask = sprd_gpio_irq_mask,
.irq_unmask = sprd_gpio_irq_unmask,
.irq_set_type = sprd_gpio_irq_set_type,
.flags = IRQCHIP_SKIP_SET_WAKE,
+ .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE,
+ GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static int sprd_gpio_probe(struct platform_device *pdev)
@@ -245,7 +252,7 @@ static int sprd_gpio_probe(struct platform_device *pdev)
sprd_gpio->chip.direction_output = sprd_gpio_direction_output;
irq = &sprd_gpio->chip.irq;
- irq->chip = &sprd_gpio_irqchip;
+ gpio_irq_chip_set_chip(irq, &sprd_gpio_irqchip);
irq->handler = handle_bad_irq;
irq->default_type = IRQ_TYPE_NONE;
irq->parent_handler = sprd_gpio_irq_handler;
