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Date: Fri, 21 Sep 2012 18:06:51 +0800
From: Haojian Zhuang <haojian.zhuang@...il.com>
To: sameo@...ux.intel.com, linux-kernel@...r.kernel.org,
dmitry.torokhov@...il.com
Cc: Haojian Zhuang <haojian.zhuang@...il.com>
Subject: [PATCH v2 1/4] mfd: 88pm860x: use irqdomain
Use irqdomain and allocating interrupts. It's necessary for supporting
DT mode.
Signed-off-by: Haojian Zhuang <haojian.zhuang@...il.com>
---
drivers/mfd/88pm860x-core.c | 51 ++++++++++++++++++++++++++++++++-----------
1 file changed, 38 insertions(+), 13 deletions(-)
diff --git a/drivers/mfd/88pm860x-core.c b/drivers/mfd/88pm860x-core.c
index 72bf290..b6766c9 100644
--- a/drivers/mfd/88pm860x-core.c
+++ b/drivers/mfd/88pm860x-core.c
@@ -15,6 +15,7 @@
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
@@ -520,15 +521,12 @@ static void pm860x_irq_sync_unlock(struct irq_data *data)
static void pm860x_irq_enable(struct irq_data *data)
{
- struct pm860x_chip *chip = irq_data_get_irq_chip_data(data);
- pm860x_irqs[data->irq - chip->irq_base].enable
- = pm860x_irqs[data->irq - chip->irq_base].offs;
+ pm860x_irqs[data->hwirq].enable = pm860x_irqs[data->hwirq].offs;
}
static void pm860x_irq_disable(struct irq_data *data)
{
- struct pm860x_chip *chip = irq_data_get_irq_chip_data(data);
- pm860x_irqs[data->irq - chip->irq_base].enable = 0;
+ pm860x_irqs[data->hwirq].enable = 0;
}
static struct irq_chip pm860x_irq_chip = {
@@ -539,6 +537,25 @@ static struct irq_chip pm860x_irq_chip = {
.irq_disable = pm860x_irq_disable,
};
+static int pm860x_irq_domain_map(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ irq_set_chip_data(virq, d->host_data);
+ irq_set_chip_and_handler(virq, &pm860x_irq_chip, handle_edge_irq);
+ irq_set_nested_thread(virq, 1);
+#ifdef CONFIG_ARM
+ set_irq_flags(virq, IRQF_VALID);
+#else
+ irq_set_noprobe(virq);
+#endif
+ return 0;
+}
+
+static struct irq_domain_ops pm860x_irq_domain_ops = {
+ .map = pm860x_irq_domain_map,
+ .xlate = irq_domain_xlate_onetwocell,
+};
+
static int __devinit device_gpadc_init(struct pm860x_chip *chip,
struct pm860x_platform_data *pdata)
{
@@ -593,13 +610,9 @@ static int __devinit device_irq_init(struct pm860x_chip *chip,
: chip->companion;
unsigned char status_buf[INT_STATUS_NUM];
unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
- int i, data, mask, ret = -EINVAL;
- int __irq;
-
- if (!pdata || !pdata->irq_base) {
- dev_warn(chip->dev, "No interrupt support on IRQ base\n");
- return -EINVAL;
- }
+ int data, mask, ret = -EINVAL;
+ int nr_irqs, irq_base = -1;
+ struct device_node *node = i2c->dev.of_node;
mask = PM8607_B0_MISC1_INV_INT | PM8607_B0_MISC1_INT_CLEAR
| PM8607_B0_MISC1_INT_MASK;
@@ -639,7 +652,19 @@ static int __devinit device_irq_init(struct pm860x_chip *chip,
goto out;
mutex_init(&chip->irq_lock);
- chip->irq_base = pdata->irq_base;
+
+ if (pdata && pdata->irq_base)
+ irq_base = pdata->irq_base;
+ nr_irqs = ARRAY_SIZE(pm860x_irqs);
+ chip->irq_base = irq_alloc_descs(irq_base, 0, nr_irqs, 0);
+ if (chip->irq_base < 0) {
+ dev_err(&i2c->dev, "Failed to allocate interrupts, ret:%d\n",
+ chip->irq_base);
+ ret = -EBUSY;
+ goto out;
+ }
+ irq_domain_add_legacy(node, nr_irqs, chip->irq_base, 0,
+ &pm860x_irq_domain_ops, chip);
chip->core_irq = i2c->irq;
if (!chip->core_irq)
goto out;
--
1.7.9.5
--
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