information is passed as part of platform data.

It would actually be good to ask the interrupt controller driver what kind of
interrupt signal it expects for a given interrupt line. We can get the irq type
by calling: irqd_get_trigger_type() routine.

So, now we don't need to pass it via platform data. This is earlier discussed
here:

https://lkml.org/lkml/2012/11/26/711

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---

@Linus/Shiraz: Can you please test this patch? You don't really need to test 1/3
and 3/3, but would be good if you do that too..

This is actually V1 of this patch.

 arch/arm/mach-ux500/board-mop500-stuib.c | 1 -
 drivers/mfd/stmpe.c                      | 7 ++++---
 include/linux/mfd/stmpe.h                | 2 --
 3 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/arch/arm/mach-ux500/board-mop500-stuib.c b/arch/arm/mach-ux500/board-mop500-stuib.c
index 564f57d..0efcf97 100644
--- a/arch/arm/mach-ux500/board-mop500-stuib.c
+++ b/arch/arm/mach-ux500/board-mop500-stuib.c

@@ -57,7 +57,6 @@ static struct stmpe_keypad_platform_data stmpe1601_keypad_data = {
 static struct stmpe_platform_data stmpe1601_data = {
 	.id		= 1,
 	.blocks		= STMPE_BLOCK_KEYPAD,
-	.irq_trigger    = IRQF_TRIGGER_FALLING,
 	.irq_base       = MOP500_STMPE1601_IRQ(0),
 	.keypad		= &stmpe1601_keypad_data,
 	.autosleep      = true,

diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
index 34408b4..10819e6 100644
--- a/drivers/mfd/stmpe.c
+++ b/drivers/mfd/stmpe.c

@@ -914,7 +914,6 @@ static int __devinit stmpe_irq_init(struct stmpe *stmpe,
 
 static int __devinit stmpe_chip_init(struct stmpe *stmpe)
 {
-	unsigned int irq_trigger = stmpe->pdata->irq_trigger;
 	int autosleep_timeout = stmpe->pdata->autosleep_timeout;
 	struct stmpe_variant_info *variant = stmpe->variant;
 	u8 icr = 0;

@@ -941,6 +940,9 @@ static int __devinit stmpe_chip_init(struct stmpe *stmpe)
 		return ret;
 
 	if (stmpe->irq >= 0) {
+		unsigned int irq_trigger =
+			irqd_get_trigger_type(irq_get_irq_data(stmpe->irq));
+
 		if (id == STMPE801_ID)
 			icr = STMPE801_REG_SYS_CTRL_INT_EN;
 		else

@@ -1118,8 +1120,7 @@ int __devinit stmpe_probe(struct stmpe_client_info *ci, int partnum)
 			return ret;
 
 		ret = devm_request_threaded_irq(ci->dev, stmpe->irq, NULL,
-				stmpe_irq, pdata->irq_trigger | IRQF_ONESHOT,
-				"stmpe", stmpe);
+				stmpe_irq, IRQF_ONESHOT, "stmpe", stmpe);