Re: [PATCH v2 00/16] gpio: Tight IRQ chip integration and banked infrastructure

[Thierry Reding]

On Fri, Oct 06, 2017 at 01:07:49PM +0200, Thierry Reding wrote:
> On Thu, Sep 28, 2017 at 09:22:17AM -0500, Grygorii Strashko wrote:
[...]
> > - all GPIO IRQs mapped statically
> 
> This series predates your work on the dynamic IRQ mapping, so I hadn't
> picked up those changes. This should be easily solved by the attached
> patch, though.

Here's the patch.

Thierry

--- >8 ---
commit 139c254bf963bf373d83970e530a56599f1832cc
Author: Thierry Reding <tred...@nvidia.com>
Date:   Fri Oct 6 12:12:27 2017 +0200

    fixup! gpio: Implement tighter IRQ chip integration

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index b3bd19b793d3..2e450afe61b3 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1708,9 +1708,23 @@ static void gpiochip_irq_relres(struct irq_data *d)
 
 static int gpiochip_to_irq(struct gpio_chip *chip, unsigned offset)
 {
+       unsigned int irq;
+       int err;
+
        if (!gpiochip_irqchip_irq_valid(chip, offset))
                return -ENXIO;
-       return irq_create_mapping(chip->irq.domain, offset);
+
+       irq = irq_create_mapping(chip->irq.domain, offset);
+       if (!irq)
+               return 0;
+
+       if (chip->irq.map) {
+               err = irq_set_parent(irq, chip->irq.map[offset]);
+               if (err < 0)
+                       return err;
+       }
+
+       return irq;
 }
 
 /**
@@ -1856,27 +1870,6 @@ static int gpiochip_add_irqchip(struct gpio_chip 
*gpiochip)
                gpiochip->irq.nested = true;
        }
 
-       /*
-        * Prepare the mapping since the IRQ chip shall be orthogonal to any
-        * GPIO chip calls.
-        */
-       for (i = 0; i < gpiochip->ngpio; i++) {
-               unsigned int irq;
-
-               if (!gpiochip_irqchip_irq_valid(gpiochip, i))
-                       continue;
-
-               irq = irq_create_mapping(gpiochip->irq.domain, i);
-               if (!irq) {
-                       chip_err(gpiochip,
-                                "failed to create IRQ mapping for GPIO#%u\n",
-                                i);
-                       continue;
-               }
-
-               irq_set_parent(irq, gpiochip->irq.map[i]);
-       }
-
        acpi_gpiochip_request_interrupts(gpiochip);
 
        return 0;

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