[PATCH 1/2] mfd: add irq domain support for max8997 interrupts

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Add irq domain support for max8997 interrupts. All uses of irq_base in platform
data and max8997 driver private data are removed.

Cc: MyungJoo Ham <myungjoo.ham@xxxxxxxxxxx>
Signed-off-by: Thomas Abraham <thomas.abraham@xxxxxxxxxx>
---
 arch/arm/mach-exynos/mach-nuri.c    |    4 ----
 arch/arm/mach-exynos/mach-origen.c  |    1 -
 drivers/mfd/max8997-irq.c           |   33 +++++++++++++++++++--------------
 drivers/mfd/max8997.c               |    1 -
 include/linux/mfd/max8997-private.h |    4 +++-
 include/linux/mfd/max8997.h         |    1 -
 6 files changed, 22 insertions(+), 22 deletions(-)

diff --git a/arch/arm/mach-exynos/mach-nuri.c b/arch/arm/mach-exynos/mach-nuri.c
index 236bbe1..ae333e5 100644
--- a/arch/arm/mach-exynos/mach-nuri.c
+++ b/arch/arm/mach-exynos/mach-nuri.c
@@ -1077,12 +1077,8 @@ static struct platform_device nuri_max8903_device = {
 static void __init nuri_power_init(void)
 {
 	int gpio;
-	int irq_base = IRQ_GPIO_END + 1;
 	int ta_en = 0;
 
-	nuri_max8997_pdata.irq_base = irq_base;
-	irq_base += MAX8997_IRQ_NR;
-
 	gpio = EXYNOS4_GPX0(7);
 	gpio_request(gpio, "AP_PMIC_IRQ");
 	s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(0xf));
diff --git a/arch/arm/mach-exynos/mach-origen.c b/arch/arm/mach-exynos/mach-origen.c
index f56d027..588b0a8 100644
--- a/arch/arm/mach-exynos/mach-origen.c
+++ b/arch/arm/mach-exynos/mach-origen.c
@@ -421,7 +421,6 @@ struct max8997_platform_data __initdata origen_max8997_pdata = {
 	.buck1_gpiodvs	= false,
 	.buck2_gpiodvs	= false,
 	.buck5_gpiodvs	= false,
-	.irq_base	= IRQ_GPIO_END + 1,
 
 	.ignore_gpiodvs_side_effect = true,
 	.buck125_default_idx = 0x0,
diff --git a/drivers/mfd/max8997-irq.c b/drivers/mfd/max8997-irq.c
index 09274cf..eb9cad5 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)
@@ -179,10 +180,11 @@ static struct irq_chip max8997_irq_chip = {
 static irqreturn_t max8997_irq_thread(int irq, void *data)
 {
 	struct max8997_dev *max8997 = data;
+	struct irq_domain *domain = &max8997->irq_domain;
 	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) {
@@ -268,9 +270,9 @@ static irqreturn_t max8997_irq_thread(int irq, void *data)
 		irq_reg[i] &= ~max8997->irq_masks_cur[i];
 
 	/* Report */
-	for (i = 0; i < MAX8997_IRQ_NR; i++) {
+	irq_domain_for_each_irq(domain, i, cur_irq) {
 		if (irq_reg[max8997_irqs[i].group] & max8997_irqs[i].mask)
-			handle_nested_irq(max8997->irq_base + i);
+			handle_nested_irq(cur_irq);
 	}
 
 	return IRQ_HANDLED;
@@ -278,13 +280,14 @@ 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.irq_base)
+		max8997_irq_thread(max8997->irq_domain.irq_base, max8997);
 	return 0;
 }
 
 int max8997_irq_init(struct max8997_dev *max8997)
 {
+	struct irq_domain *domain = &max8997->irq_domain;
 	int i;
 	int cur_irq;
 	int ret;
@@ -292,12 +295,6 @@ int max8997_irq_init(struct max8997_dev *max8997)
 
 	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;
 	}
 
@@ -327,9 +324,17 @@ int max8997_irq_init(struct max8997_dev *max8997)
 					true : false;
 	}
 
+	domain->irq_base = irq_alloc_descs(-1, 0, MAX8997_IRQ_NR, 0);
+	if (domain->irq_base < 0) {
+		dev_err(max8997->dev, "failed to alloc irq descs\n");
+		return 0;
+	}
+	domain->nr_irq = MAX8997_IRQ_NR;
+	domain->ops = &irq_domain_simple_ops;
+	irq_domain_add(domain);
+
 	/* Register with genirq */
-	for (i = 0; i < MAX8997_IRQ_NR; i++) {
-		cur_irq = i + max8997->irq_base;
+	irq_domain_for_each_irq(domain, i, cur_irq) {
 		irq_set_chip_data(cur_irq, max8997);
 		irq_set_chip_and_handler(cur_irq, &max8997_irq_chip,
 				handle_edge_irq);
diff --git a/drivers/mfd/max8997.c b/drivers/mfd/max8997.c
index 5be53ae..b996c6e 100644
--- a/drivers/mfd/max8997.c
+++ b/drivers/mfd/max8997.c
@@ -142,7 +142,6 @@ 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);
diff --git a/include/linux/mfd/max8997-private.h b/include/linux/mfd/max8997-private.h
index 3f4deb6..04c5779 100644
--- a/include/linux/mfd/max8997-private.h
+++ b/include/linux/mfd/max8997-private.h
@@ -23,6 +23,8 @@
 #define __LINUX_MFD_MAX8997_PRIV_H
 
 #include <linux/i2c.h>
+#include <linux/export.h>
+#include <linux/irqdomain.h>
 
 #define MAX8997_REG_INVALID	(0xff)
 
@@ -325,7 +327,7 @@ struct max8997_dev {
 
 	int irq;
 	int ono;
-	int irq_base;
+	struct irq_domain irq_domain;
 	struct mutex irqlock;
 	int irq_masks_cur[MAX8997_IRQ_GROUP_NR];
 	int irq_masks_cache[MAX8997_IRQ_GROUP_NR];
diff --git a/include/linux/mfd/max8997.h b/include/linux/mfd/max8997.h
index 0bbd13d..1e0b9cc 100644
--- a/include/linux/mfd/max8997.h
+++ b/include/linux/mfd/max8997.h
@@ -79,7 +79,6 @@ struct max8997_regulator_data {
 
 struct max8997_platform_data {
 	/* IRQ */
-	int irq_base;
 	int ono;
 	int wakeup;
 
-- 
1.6.6.rc2

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