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Subject[PATCH] pinctrl/nomadik: allocate IRQ descriptors dynamically
Date
From: Linus Walleij <linus.walleij@linaro.org>

This allocates the IRQ descriptors for the Nomadik pin controller
dynamically so that we don't have to rely on some other mechanism
doing it, and moving a step closer to a linear IRQ domain.

Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/pinctrl/pinctrl-nomadik.c | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-nomadik.c b/drivers/pinctrl/pinctrl-nomadik.c
index 3dde653..29921d1 100644
--- a/drivers/pinctrl/pinctrl-nomadik.c
+++ b/drivers/pinctrl/pinctrl-nomadik.c
@@ -1185,6 +1185,8 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev)
struct clk *clk;
int secondary_irq;
void __iomem *base;
+ int irq_start;
+ int irq_base;
int irq;
int ret;

@@ -1288,9 +1290,22 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev)

platform_set_drvdata(dev, nmk_chip);

+ /*
+ * Allocate descriptors and IRQ domain using the legacy model, this
+ * should eventually be replaced with a linear IRQ domain as we get
+ * independent from the irq numbers with the switch to device tree.
+ */
+ irq_start = NOMADIK_GPIO_TO_IRQ(pdata->first_gpio);
+ irq_base = irq_alloc_descs(irq_start, 0, NMK_GPIO_PER_CHIP,
+ numa_node_id());
+ if (IS_ERR_VALUE(irq_base)) {
+ WARN(1, "Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n",
+ irq_start);
+ irq_base = irq_start;
+ }
nmk_chip->domain = irq_domain_add_legacy(np, NMK_GPIO_PER_CHIP,
- NOMADIK_GPIO_TO_IRQ(pdata->first_gpio),
- 0, &nmk_gpio_irq_simple_ops, nmk_chip);
+ irq_base, 0,
+ &nmk_gpio_irq_simple_ops, nmk_chip);
if (!nmk_chip->domain) {
dev_err(&dev->dev, "failed to create irqdomain\n");
ret = -ENOSYS;
--
1.7.11.3


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