[PATCH 2/4] mfd: 88pm800: use irq_mode to configure interrupt status reg clear method

[Vaibhav Hiremath <vaibhav.hiremath@linaro.org>]

>From the spec, bit 1 of reg 0xe (page 0): IN_CLEAR_MODE controls the
method of clearing interrupt status register of 88pm800;

  0: clear on read
  1: clear on write

Signed-off-by: zhaoy <zhaoy@marvell.com>
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
---
 drivers/mfd/88pm800.c       | 4 +++-
 include/linux/mfd/88pm80x.h | 2 ++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c
index 06ee058..8ea4467 100644
--- a/drivers/mfd/88pm800.c
+++ b/drivers/mfd/88pm800.c
@@ -391,7 +391,8 @@ static int device_irq_init_800(struct pm80x_chip *chip)
 	    PM800_WAKEUP2_INV_INT | PM800_WAKEUP2_INT_CLEAR |
 	    PM800_WAKEUP2_INT_MASK;
 
-	data = PM800_WAKEUP2_INT_CLEAR;
+	data = (chip->irq_mode) ?
+		PM800_WAKEUP2_INT_WRITE_CLEAR : PM800_WAKEUP2_INT_READ_CLEAR;
 	ret = regmap_update_bits(map, PM800_WAKEUP2, mask, data);
 
 	if (ret < 0)
@@ -514,6 +515,7 @@ static int device_800_init(struct pm80x_chip *chip,
 	}
 
 	chip->regmap_irq_chip = &pm800_irq_chip;
+	chip->irq_mode = pdata->irq_mode;
 
 	ret = device_irq_init_800(chip);
 	if (ret < 0) {
diff --git a/include/linux/mfd/88pm80x.h b/include/linux/mfd/88pm80x.h
index 97cb283..6ed6c16 100644
--- a/include/linux/mfd/88pm80x.h
+++ b/include/linux/mfd/88pm80x.h
@@ -77,6 +77,8 @@ enum {
 #define PM800_WAKEUP2		(0x0E)
 #define PM800_WAKEUP2_INV_INT		(1 << 0)
 #define PM800_WAKEUP2_INT_CLEAR		(1 << 1)
+#define PM800_WAKEUP2_INT_READ_CLEAR		(0 << 1)
+#define PM800_WAKEUP2_INT_WRITE_CLEAR		(1 << 1)
 #define PM800_WAKEUP2_INT_MASK		(1 << 2)
 
 #define PM800_POWER_UP_LOG	(0x10)
-- 
1.9.1