gpio/twl: Allocate irq_desc dynamically for SPARSE_IRQ support

Do not use the board pdata for irq_base, but allocate them dynamically
to allow a proper support of SPARSE_IRQ.

Fix an unneeded line wrap.

Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 17 insertions, 16 deletions

diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c
index 697396c74627..49e5c6eb403a 100644
--- a/drivers/gpio/gpio-twl4030.c
+++ b/drivers/gpio/gpio-twl4030.c
@@ -395,23 +395,26 @@ static int gpio_twl4030_remove(struct platform_device *pdev);
 static int __devinit gpio_twl4030_probe(struct platform_device *pdev)
 {
         struct twl4030_gpio_platform_data *pdata = pdev->dev.platform_data;
-        int ret;
+        int ret, irq_base;
 
         /* maybe setup IRQs */
-        if (pdata->irq_base) {
-                if (is_module()) {
-                        dev_err(&pdev->dev,
-                                "can't dispatch IRQs from modules\n");
-                        goto no_irqs;
-                }
-                ret = twl4030_sih_setup(&pdev->dev, TWL4030_MODULE_GPIO,
-                                        pdata->irq_base);
-                if (ret < 0)
-                        return ret;
-                WARN_ON(ret != pdata->irq_base);
-                twl4030_gpio_irq_base = ret;
+        if (is_module()) {
+                dev_err(&pdev->dev, "can't dispatch IRQs from modules\n");
+                goto no_irqs;
+        }
+
+        irq_base = irq_alloc_descs(-1, 0, TWL4030_GPIO_MAX, 0);
+        if (irq_base < 0) {
+                dev_err(&pdev->dev, "Failed to alloc irq_descs\n");
+                return irq_base;
         }
 
+        ret = twl4030_sih_setup(&pdev->dev, TWL4030_MODULE_GPIO, irq_base);
+        if (ret < 0)
+                return ret;
+
+        twl4030_gpio_irq_base = irq_base;
+
 no_irqs:
         /*
          * NOTE:  boards may waste power if they don't set pullups
@@ -443,9 +446,7 @@ no_irqs:
 
         ret = gpiochip_add(&twl_gpiochip);
         if (ret < 0) {
-                dev_err(&pdev->dev,
-                                "could not register gpiochip, %d\n",
-                                ret);
+                dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret);
                 twl_gpiochip.ngpio = 0;
                 gpio_twl4030_remove(pdev);
         } else if (pdata->setup) {