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path: root/drivers/mfd/twl6030-irq.c
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Diffstat (limited to 'drivers/mfd/twl6030-irq.c')
-rw-r--r--drivers/mfd/twl6030-irq.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/mfd/twl6030-irq.c b/drivers/mfd/twl6030-irq.c
index c6b456ad7342..aa367a2c846c 100644
--- a/drivers/mfd/twl6030-irq.c
+++ b/drivers/mfd/twl6030-irq.c
@@ -185,8 +185,17 @@ static int twl6030_irq_thread(void *data)
}
local_irq_enable();
}
- ret = twl_i2c_write(TWL_MODULE_PIH, sts.bytes,
- REG_INT_STS_A, 3); /* clear INT_STS_A */
+
+ /*
+ * NOTE:
+ * Simulation confirms that documentation is wrong w.r.t the
+ * interrupt status clear operation. A single *byte* write to
+ * any one of STS_A to STS_C register results in all three
+ * STS registers being reset. Since it does not matter which
+ * value is written, all three registers are cleared on a
+ * single byte write, so we just use 0x0 to clear.
+ */
+ ret = twl_i2c_write_u8(TWL_MODULE_PIH, 0x00, REG_INT_STS_A);
if (ret)
pr_warning("twl6030: I2C error in clearing PIH ISR\n");