gpio: omap: Fix interrupt names

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@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: Kevin Hilman <khilman@linaro.org>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 17 insertions, 14 deletions

diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 5cd33677a018..415682f69214 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;