diff mbox

[v5,1/2] mfd: add irq domain support for max8997 interrupts

Message ID 1334741463-25058-2-git-send-email-thomas.abraham@linaro.org
State New
Headers show

Commit Message

thomas.abraham@linaro.org April 18, 2012, 9:31 a.m. UTC 
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.

Cc: Karol Lewandowski <k.lewandowsk@samsung.com>
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
---
 arch/arm/mach-exynos/mach-nuri.c    |    4 --
 arch/arm/mach-exynos/mach-origen.c  |    1 -
 drivers/mfd/max8997-irq.c           |   70 ++++++++++++++++++-----------------
 drivers/mfd/max8997.c               |    1 -
 include/linux/mfd/max8997-private.h |    4 +-
 include/linux/mfd/max8997.h         |    1 -
 6 files changed, 39 insertions(+), 42 deletions(-)

Comments

Mark Brown April 18, 2012, 4:45 p.m. UTC | #1 
On Wed, Apr 18, 2012 at 03:01:02PM +0530, Thomas Abraham wrote:

>  struct max8997_platform_data {
>  	/* IRQ */
> -	int irq_base;
>  	int ono;
>  	int wakeup;

This will *still* break the build.
diff mbox

Patch

diff --git a/arch/arm/mach-exynos/mach-nuri.c b/arch/arm/mach-exynos/mach-nuri.c
index 91e5986..d5496d9 100644
--- a/arch/arm/mach-exynos/mach-nuri.c
+++ b/arch/arm/mach-exynos/mach-nuri.c
@@ -1034,12 +1034,8 @@  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 827cb99..d3b2e9d 100644
--- a/arch/arm/mach-exynos/mach-origen.c
+++ b/arch/arm/mach-exynos/mach-origen.c
@@ -424,7 +424,6 @@  static 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..42ea220 100644
--- a/drivers/mfd/max8997-irq.c
+++ b/drivers/mfd/max8997-irq.c
@@ -139,17 +139,10 @@  static void max8997_irq_sync_unlock(struct irq_data *data)
 	mutex_unlock(&max8997->irqlock);
 }
 
-static const inline struct max8997_irq_data *
-irq_to_max8997_irq(struct max8997_dev *max8997, int irq)
-{
-	return &max8997_irqs[irq - max8997->irq_base];
-}
-
 static void max8997_irq_mask(struct irq_data *data)
 {
 	struct max8997_dev *max8997 = irq_get_chip_data(data->irq);
-	const struct max8997_irq_data *irq_data = irq_to_max8997_irq(max8997,
-								data->irq);
+	const struct max8997_irq_data *irq_data = &max8997_irqs[data->hwirq];
 
 	max8997->irq_masks_cur[irq_data->group] |= irq_data->mask;
 }
@@ -157,8 +150,7 @@  static void max8997_irq_mask(struct irq_data *data)
 static void max8997_irq_unmask(struct irq_data *data)
 {
 	struct max8997_dev *max8997 = irq_get_chip_data(data->irq);
-	const struct max8997_irq_data *irq_data = irq_to_max8997_irq(max8997,
-								data->irq);
+	const struct max8997_irq_data *irq_data = &max8997_irqs[data->hwirq];
 
 	max8997->irq_masks_cur[irq_data->group] &= ~irq_data->mask;
 }
@@ -182,7 +174,7 @@  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 +261,11 @@  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 +273,40 @@  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 +336,11 @@  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 cb83a7a..20ecad3 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);
diff --git a/include/linux/mfd/max8997-private.h b/include/linux/mfd/max8997-private.h
index 3f4deb6..830152c 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 28726dd..24b1a76 100644
--- a/include/linux/mfd/max8997.h
+++ b/include/linux/mfd/max8997.h
@@ -204,7 +204,6 @@  struct max8997_led_platform_data {
 
 struct max8997_platform_data {
 	/* IRQ */
-	int irq_base;
 	int ono;
 	int wakeup;