[PATCH 2/3] MFD: twl6040: Allocate IRQ numbers dynamically

Peter Ujfalusi
2012-05-03T12:54:55Z

Use irq_alloc_descs() to get the IRQ number range dynamically instead of
the hardwired use if pdata->irq_base.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
drivers/mfd/twl6040-core.c | 3 +--
drivers/mfd/twl6040-irq.c | 13 +++++++++++--
2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/mfd/twl6040-core.c b/drivers/mfd/twl6040-core.c
index 7a92d95..c50fba7 100644
--- a/drivers/mfd/twl6040-core.c
+++ b/drivers/mfd/twl6040-core.c
@@ -515,7 +515,7 @@ static int __devinit twl6040_probe(struct i2c_client *client,
}

/* In order to operate correctly we need valid interrupt config */
- if (!client->irq || !pdata->irq_base) {
+ if (!client->irq) {
dev_err(&client->dev, "Invalid IRQ configuration\n");
return -EINVAL;
}
@@ -552,7 +552,6 @@ static int __devinit twl6040_probe(struct i2c_client *client,

twl6040->dev = &client->dev;
twl6040->irq = client->irq;
- twl6040->irq_base = pdata->irq_base;

mutex_init(&twl6040->mutex);
mutex_init(&twl6040->io_mutex);
diff --git a/drivers/mfd/twl6040-irq.c b/drivers/mfd/twl6040-irq.c
index 008022c..914978e 100644
--- a/drivers/mfd/twl6040-irq.c
+++ b/drivers/mfd/twl6040-irq.c
@@ -23,6 +23,7 @@

#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/err.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
@@ -138,7 +139,7 @@ static irqreturn_t twl6040_irq_thread(int irq, void *data)

int twl6040_irq_init(struct twl6040 *twl6040)
{
- int i, nr_irqs, ret;
+ int i, nr_irqs, irq_base, ret;
u8 val;

mutex_init(&twl6040->irq_mutex);
@@ -149,8 +150,16 @@ int twl6040_irq_init(struct twl6040 *twl6040)
twl6040_reg_write(twl6040, TWL6040_REG_INTMR, TWL6040_ALLINT_MSK);

nr_irqs = ARRAY_SIZE(twl6040_irqs);
+
+ irq_base = irq_alloc_descs(-1, 0, nr_irqs, 0);
+ if (IS_ERR_VALUE(irq_base)) {
+ dev_err(twl6040->dev, "Fail to allocate IRQ descs\n");
+ return irq_base;
+ }
+ twl6040->irq_base = irq_base;
+
/* Register them with genirq */
- for (i = twl6040->irq_base; i < twl6040->irq_base + nr_irqs; i++) {
+ for (i = irq_base; i < irq_base + nr_irqs; i++) {
irq_set_chip_data(i, twl6040);
irq_set_chip_and_handler(i, &twl6040_irq_chip,
handle_level_irq);
--
1.7.8.6