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authorTomasz Figa <t.figa@samsung.com>2013-06-24 14:39:52 +0200
committerSamuel Ortiz <sameo@linux.intel.com>2013-06-30 23:29:44 +0200
commit443c6ae253e96db9a5800a28d7c61131e81c2dee (patch)
treec9df532a7f81a8799fe52f6845504b275803e58e /drivers/mfd
parentb5c46787df1f28b0a24499e275491ba9a505c8ec (diff)
mfd: max8998: Add irq domain support
This patch adds irq domain support for max8998 interrupts. To keep both non-DT and DT worlds happy, simple domain is used, which is linear when no explicit IRQ base is specified and legacy, with static mapping, otherwise. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/Kconfig1
-rw-r--r--drivers/mfd/max8998-irq.c65
2 files changed, 41 insertions, 25 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 3bb2932eafb1..aecd6ddcbbbf 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -363,6 +363,7 @@ config MFD_MAX8998
bool "Maxim Semiconductor MAX8998/National LP3974 PMIC Support"
depends on I2C=y && GENERIC_HARDIRQS
select MFD_CORE
+ select IRQ_DOMAIN
help
Say yes here to support for Maxim Semiconductor MAX8998 and
National Semiconductor LP3974. This is a Power Management IC.
diff --git a/drivers/mfd/max8998-irq.c b/drivers/mfd/max8998-irq.c
index 5919710dc9ed..c469477eb778 100644
--- a/drivers/mfd/max8998-irq.c
+++ b/drivers/mfd/max8998-irq.c
@@ -14,6 +14,7 @@
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
+#include <linux/irqdomain.h>
#include <linux/mfd/max8998-private.h>
struct max8998_irq_data {
@@ -99,7 +100,8 @@ static struct max8998_irq_data max8998_irqs[] = {
static inline struct max8998_irq_data *
irq_to_max8998_irq(struct max8998_dev *max8998, int irq)
{
- return &max8998_irqs[irq - max8998->irq_base];
+ struct irq_data *data = irq_get_irq_data(irq);
+ return &max8998_irqs[data->hwirq];
}
static void max8998_irq_lock(struct irq_data *data)
@@ -176,8 +178,14 @@ static irqreturn_t max8998_irq_thread(int irq, void *data)
/* Report */
for (i = 0; i < MAX8998_IRQ_NR; i++) {
- if (irq_reg[max8998_irqs[i].reg - 1] & max8998_irqs[i].mask)
- handle_nested_irq(max8998->irq_base + i);
+ if (irq_reg[max8998_irqs[i].reg - 1] & max8998_irqs[i].mask) {
+ irq = irq_find_mapping(max8998->irq_domain, i);
+ if (WARN_ON(!irq)) {
+ disable_irq_nosync(max8998->irq);
+ return IRQ_NONE;
+ }
+ handle_nested_irq(irq);
+ }
}
return IRQ_HANDLED;
@@ -185,27 +193,40 @@ static irqreturn_t max8998_irq_thread(int irq, void *data)
int max8998_irq_resume(struct max8998_dev *max8998)
{
- if (max8998->irq && max8998->irq_base)
- max8998_irq_thread(max8998->irq_base, max8998);
+ if (max8998->irq && max8998->irq_domain)
+ max8998_irq_thread(max8998->irq, max8998);
+ return 0;
+}
+
+static int max8998_irq_domain_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hw)
+{
+ struct max8997_dev *max8998 = d->host_data;
+
+ irq_set_chip_data(irq, max8998);
+ irq_set_chip_and_handler(irq, &max8998_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 max8998_irq_domain_ops = {
+ .map = max8998_irq_domain_map,
+};
+
int max8998_irq_init(struct max8998_dev *max8998)
{
int i;
- int cur_irq;
int ret;
+ struct irq_domain *domain;
if (!max8998->irq) {
dev_warn(max8998->dev,
"No interrupt specified, no interrupts\n");
- max8998->irq_base = 0;
- return 0;
- }
-
- if (!max8998->irq_base) {
- dev_err(max8998->dev,
- "No interrupt base specified, no interrupts\n");
return 0;
}
@@ -221,19 +242,13 @@ int max8998_irq_init(struct max8998_dev *max8998)
max8998_write_reg(max8998->i2c, MAX8998_REG_STATUSM1, 0xff);
max8998_write_reg(max8998->i2c, MAX8998_REG_STATUSM2, 0xff);
- /* register with genirq */
- for (i = 0; i < MAX8998_IRQ_NR; i++) {
- cur_irq = i + max8998->irq_base;
- irq_set_chip_data(cur_irq, max8998);
- irq_set_chip_and_handler(cur_irq, &max8998_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_simple(NULL, MAX8998_IRQ_NR,
+ max8998->irq_base, &max8998_irq_domain_ops, max8998);
+ if (!domain) {
+ dev_err(max8998->dev, "could not create irq domain\n");
+ return -ENODEV;
}
+ max8998->irq_domain = domain;
ret = request_threaded_irq(max8998->irq, NULL, max8998_irq_thread,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,