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authorAnkur Raina <Ankur.Raina@kpitcummins.com>2013-07-05 18:48:30 +0530
committerSamuel Ortiz <sameo@linux.intel.com>2013-07-31 02:02:53 +0200
commit4b3b4a501dee3cee869f8bacb55f2cd30044cc9b (patch)
tree76b8a0c63f989996929296dee22f435d1e5d1f64 /drivers/mfd/da9055-core.c
parentaa32acadcf0acc9c0017f084363048a3cc3e683d (diff)
downloadlinux-linaro-stable-4b3b4a501dee3cee869f8bacb55f2cd30044cc9b.tar.gz
mfd: Fix for DA9055 driver initialization
This patch clears all the events received while powering up DA9055. While powering up DA9055, both power sequencer and gpio events are received. These events remain uncleared after boot up, due to which further event handling also fails. DA9055 has three event registers. The event register bits are set to '1' on receiving an event. The events can be cleared on writing a '1' to the set bit, which would then clear that bit to '0'. After applying this patch we have a clean state after boot up. Signed-off-by: Ankur Raina <Ankur.Raina@kpitcummins.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/da9055-core.c')
-rw-r--r--drivers/mfd/da9055-core.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/mfd/da9055-core.c b/drivers/mfd/da9055-core.c
index 49cb23d37469..e4c0596723ab 100644
--- a/drivers/mfd/da9055-core.c
+++ b/drivers/mfd/da9055-core.c
@@ -381,6 +381,7 @@ int da9055_device_init(struct da9055 *da9055)
{
struct da9055_pdata *pdata = da9055->dev->platform_data;
int ret;
+ uint8_t clear_events[3] = {0xFF, 0xFF, 0xFF};
if (pdata && pdata->init != NULL)
pdata->init(da9055);
@@ -390,6 +391,10 @@ int da9055_device_init(struct da9055 *da9055)
else
da9055->irq_base = pdata->irq_base;
+ ret = da9055_group_write(da9055, DA9055_REG_EVENT_A, 3, clear_events);
+ if (ret < 0)
+ return ret;
+
ret = regmap_add_irq_chip(da9055->regmap, da9055->chip_irq,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
da9055->irq_base, &da9055_regmap_irq_chip,