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authorThomas Abraham <thomas.abraham@linaro.org>2012-03-24 15:19:49 +0530
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-04-16 19:46:55 +0100
commit98d8618af37728f6e18e84110ddb99987b47dd12 (patch)
treeb9b29685a18b2aaf4522b6a2d6fe9a77cf9b09e3 /drivers/mfd
parentcd22a965c46e249843c049cbbfe3d9f12270ea2b (diff)
mfd: add irq domain support for max8997 interrupts
Add irq domain support for max8997 interrupts. The reverse mapping method used is linear mapping since the sub-drivers of max8997 such as regulator and charger drivers can use the max8997 irq_domain to get the linux irq number for max8997 interrupts. All uses of irq_base in platform data and max8997 driver private data are removed. Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org> Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/max8997-irq.c61
-rw-r--r--drivers/mfd/max8997.c1
2 files changed, 36 insertions, 26 deletions
diff --git a/drivers/mfd/max8997-irq.c b/drivers/mfd/max8997-irq.c
index 09274cf7c33b..00390a117ae6 100644
--- a/drivers/mfd/max8997-irq.c
+++ b/drivers/mfd/max8997-irq.c
@@ -142,7 +142,8 @@ static void max8997_irq_sync_unlock(struct irq_data *data)
static const inline struct max8997_irq_data *
irq_to_max8997_irq(struct max8997_dev *max8997, int irq)
{
- return &max8997_irqs[irq - max8997->irq_base];
+ struct irq_data *data = irq_get_irq_data(irq);
+ return &max8997_irqs[data->hwirq];
}
static void max8997_irq_mask(struct irq_data *data)
@@ -182,7 +183,7 @@ static irqreturn_t max8997_irq_thread(int irq, void *data)
u8 irq_reg[MAX8997_IRQ_GROUP_NR] = {};
u8 irq_src;
int ret;
- int i;
+ int i, cur_irq;
ret = max8997_read_reg(max8997->i2c, MAX8997_REG_INTSRC, &irq_src);
if (ret < 0) {
@@ -269,8 +270,11 @@ static irqreturn_t max8997_irq_thread(int irq, void *data)
/* Report */
for (i = 0; i < MAX8997_IRQ_NR; i++) {
- if (irq_reg[max8997_irqs[i].group] & max8997_irqs[i].mask)
- handle_nested_irq(max8997->irq_base + i);
+ if (irq_reg[max8997_irqs[i].group] & max8997_irqs[i].mask) {
+ cur_irq = irq_find_mapping(max8997->irq_domain, i);
+ if (cur_irq)
+ handle_nested_irq(cur_irq);
+ }
}
return IRQ_HANDLED;
@@ -278,26 +282,40 @@ static irqreturn_t max8997_irq_thread(int irq, void *data)
int max8997_irq_resume(struct max8997_dev *max8997)
{
- if (max8997->irq && max8997->irq_base)
- max8997_irq_thread(max8997->irq_base, max8997);
+ if (max8997->irq && max8997->irq_domain)
+ max8997_irq_thread(0, max8997);
+ return 0;
+}
+
+static int max8997_irq_domain_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hw)
+{
+ struct max8997_dev *max8997 = d->host_data;
+
+ irq_set_chip_data(irq, max8997);
+ irq_set_chip_and_handler(irq, &max8997_irq_chip, handle_edge_irq);
+ irq_set_nested_thread(irq, 1);
+#ifdef CONFIG_ARM
+ set_irq_flags(irq, IRQF_VALID);
+#else
+ irq_set_noprobe(irq);
+#endif
return 0;
}
+static struct irq_domain_ops max8997_irq_domain_ops = {
+ .map = max8997_irq_domain_map,
+};
+
int max8997_irq_init(struct max8997_dev *max8997)
{
+ struct irq_domain *domain;
int i;
- int cur_irq;
int ret;
u8 val;
if (!max8997->irq) {
dev_warn(max8997->dev, "No interrupt specified.\n");
- max8997->irq_base = 0;
- return 0;
- }
-
- if (!max8997->irq_base) {
- dev_err(max8997->dev, "No interrupt base specified.\n");
return 0;
}
@@ -327,18 +345,11 @@ int max8997_irq_init(struct max8997_dev *max8997)
true : false;
}
- /* Register with genirq */
- for (i = 0; i < MAX8997_IRQ_NR; i++) {
- cur_irq = i + max8997->irq_base;
- irq_set_chip_data(cur_irq, max8997);
- irq_set_chip_and_handler(cur_irq, &max8997_irq_chip,
- handle_edge_irq);
- irq_set_nested_thread(cur_irq, 1);
-#ifdef CONFIG_ARM
- set_irq_flags(cur_irq, IRQF_VALID);
-#else
- irq_set_noprobe(cur_irq);
-#endif
+ domain = irq_domain_add_linear(NULL, MAX8997_IRQ_NR,
+ &max8997_irq_domain_ops, &max8997);
+ if (!domain) {
+ dev_err(max8997->dev, "could not create irq domain\n");
+ return -ENODEV;
}
ret = request_threaded_irq(max8997->irq, NULL, max8997_irq_thread,
diff --git a/drivers/mfd/max8997.c b/drivers/mfd/max8997.c
index cb83a7ab53e7..20ecad3179d9 100644
--- a/drivers/mfd/max8997.c
+++ b/drivers/mfd/max8997.c
@@ -143,7 +143,6 @@ static int max8997_i2c_probe(struct i2c_client *i2c,
if (!pdata)
goto err;
- max8997->irq_base = pdata->irq_base;
max8997->ono = pdata->ono;
mutex_init(&max8997->iolock);