When viewing the /proc/interrupts, there is no information about which
GPIO bank a specific gpio interrupt is hooked on to. This is more than a
bit irritating as such information can esily be provided back to the
user and at times, can be crucial for debug.
So, instead of displaying something like:
31: 0 0 GPIO 0 palmas
32: 0 0 GPIO 27 mmc0
Display the following with appropriate device name:
31: 0 0 4ae10000.gpio 0 palmas
32: 0 0 4805d000.gpio 27 mmc0
This requires that we create irq_chip instance specific for each GPIO
bank which is trivial to achieve.
Signed-off-by: Nishanth Menon <nm@xxxxxx>
---
based on v3.17-rc1
drivers/gpio/gpio-omap.c | 31 +++++++++++++++++--------------
1 file changed, 17 insertions(+), 14 deletions(-)
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 1749321..aee25fa 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -857,16 +857,6 @@ static void omap_gpio_unmask_irq(struct irq_data *d)
spin_unlock_irqrestore(&bank->lock, flags);
}
-static struct irq_chip gpio_irq_chip = {
- .name = "GPIO",
- .irq_shutdown = omap_gpio_irq_shutdown,
- .irq_ack = omap_gpio_ack_irq,
- .irq_mask = omap_gpio_mask_irq,
- .irq_unmask = omap_gpio_unmask_irq,
- .irq_set_type = omap_gpio_irq_type,
- .irq_set_wake = omap_gpio_wake_enable,
-};
-
/*---------------------------------------------------------------------*/
static int omap_mpuio_suspend_noirq(struct device *dev)
@@ -1088,7 +1078,7 @@ omap_mpuio_alloc_gc(struct gpio_bank *bank, unsigned int irq_start,
IRQ_NOREQUEST | IRQ_NOPROBE, 0);
}
-static int omap_gpio_chip_init(struct gpio_bank *bank)
+static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
{
int j;
static int gpio;
@@ -1137,7 +1127,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank)
}
#endif
- ret = gpiochip_irqchip_add(&bank->chip, &gpio_irq_chip,
+ ret = gpiochip_irqchip_add(&bank->chip, irqc,
irq_base, omap_gpio_irq_handler,
IRQ_TYPE_NONE);
@@ -1147,7 +1137,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank)
return -ENODEV;
}
- gpiochip_set_chained_irqchip(&bank->chip, &gpio_irq_chip,
+ gpiochip_set_chained_irqchip(&bank->chip, irqc,
bank->irq, omap_gpio_irq_handler);
for (j = 0; j < bank->width; j++) {
@@ -1172,6 +1162,7 @@ static int omap_gpio_probe(struct platform_device *pdev)
const struct omap_gpio_platform_data *pdata;
struct resource *res;
struct gpio_bank *bank;
+ struct irq_chip *irqc;
int ret;
match = of_match_device(of_match_ptr(omap_gpio_match), dev);
@@ -1186,6 +1177,18 @@ static int omap_gpio_probe(struct platform_device *pdev)
return -ENOMEM;
}
+ irqc = devm_kzalloc(dev, sizeof(*irqc), GFP_KERNEL);
+ if (!irqc)
+ return -ENOMEM;
+
+ irqc->irq_shutdown = omap_gpio_irq_shutdown,
+ irqc->irq_ack = omap_gpio_ack_irq,
+ irqc->irq_mask = omap_gpio_mask_irq,
+ irqc->irq_unmask = omap_gpio_unmask_irq,
+ irqc->irq_set_type = omap_gpio_irq_type,
+ irqc->irq_set_wake = omap_gpio_wake_enable,
+ irqc->name = dev_name(&pdev->dev);
+
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (unlikely(!res)) {
dev_err(dev, "Invalid IRQ resource\n");
@@ -1241,7 +1244,7 @@ static int omap_gpio_probe(struct platform_device *pdev)
omap_gpio_mod_init(bank);
- ret = omap_gpio_chip_init(bank);
+ ret = omap_gpio_chip_init(bank, irqc);
if (ret)
return ret;
--
1.7.9.5
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