Currently the driver defines 3 gpiochips, one for each bank.
/sys/class/gpio/gpiochip416/label:1e000600.gpio
/sys/class/gpio/gpiochip448/label:1e000600.gpio
/sys/class/gpio/gpiochip480/label:1e000600.gpio
Unfortunately they all have the same label
Interrupts from /proc/interrupt show the same name which is
confusing:
/proc/interrupts:
17: 0 0 0 0 MIPS GIC 19 mt7621, mt7621, mt7621
which is the interrupt from the GPIO controller.
It is a little weird that all three banks are named "mt7621"
here. We also have:
26: 0 0 0 0 GPIO 18 reset
which is the interrupt from GPIO which provides the "reset"
button. I suspect that if I had interrupts form two different
banks they would both be called "GPIO" which would be a little
confusing.
In order to unify all of this set different names for each chip
Use a 'bank-based' name instead the same for all: 'mt7621-bank[0-2]'.
Create a new 'mediatek_gpio_bank_name' function which return the
name depending on the bank number. This function is allways called
with a valid index 0, 1 or 2.
Signed-off-by: Sergio Paracuellos <sergio.paracuel...@gmail.com>
---
drivers/staging/mt7621-gpio/gpio-mt7621.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/mt7621-gpio/gpio-mt7621.c
b/drivers/staging/mt7621-gpio/gpio-mt7621.c
index 698a95d..63fb5a1 100644
--- a/drivers/staging/mt7621-gpio/gpio-mt7621.c
+++ b/drivers/staging/mt7621-gpio/gpio-mt7621.c
@@ -190,13 +190,21 @@ mediatek_gpio_irq_type(struct irq_data *d, unsigned int
type)
}
static struct irq_chip mediatek_gpio_irq_chip = {
- .name = "GPIO",
.irq_unmask = mediatek_gpio_irq_unmask,
.irq_mask = mediatek_gpio_irq_mask,
.irq_mask_ack = mediatek_gpio_irq_mask,
.irq_set_type = mediatek_gpio_irq_type,
};
+static inline const char * const mediatek_gpio_bank_name(int bank)
+{
+ static const char * const bank_names[] = {
+ "mt7621-bank0", "mt7621-bank1", "mt7621-bank2",
+ };
+
+ return bank_names[bank];
+}
+
static int
mediatek_gpio_bank_probe(struct platform_device *pdev, struct device_node
*bank)
{
@@ -215,6 +223,7 @@ mediatek_gpio_bank_probe(struct platform_device *pdev,
struct device_node *bank)
spin_lock_init(&rg->lock);
rg->chip.of_node = bank;
rg->bank = be32_to_cpu(*id);
+ rg->chip.label = mediatek_gpio_bank_name(rg->bank);
dat = gpio->gpio_membase + GPIO_REG_DATA + (rg->bank * GPIO_BANK_WIDE);
set = gpio->gpio_membase + GPIO_REG_DSET + (rg->bank * GPIO_BANK_WIDE);
@@ -242,7 +251,7 @@ mediatek_gpio_bank_probe(struct platform_device *pdev,
struct device_node *bank)
*/
ret = devm_request_irq(&pdev->dev, gpio->gpio_irq,
mediatek_gpio_irq_handler, IRQF_SHARED,
- "mt7621", &rg->chip);
+ rg->chip.label, &rg->chip);
if (ret) {
dev_err(&pdev->dev, "Error requesting IRQ %d: %d\n",
@@ -250,6 +259,7 @@ mediatek_gpio_bank_probe(struct platform_device *pdev,
struct device_node *bank)
return ret;
}
+ mediatek_gpio_irq_chip.name = rg->chip.label;
ret = gpiochip_irqchip_add(&rg->chip, &mediatek_gpio_irq_chip,
0, handle_simple_irq, IRQ_TYPE_NONE);
if (ret) {
--
2.7.4
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