From 4b3b4a501dee3cee869f8bacb55f2cd30044cc9b Mon Sep 17 00:00:00 2001 From: Ankur Raina Date: Fri, 5 Jul 2013 18:48:30 +0530 Subject: [PATCH] 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 Signed-off-by: Lee Jones Signed-off-by: Samuel Ortiz --- drivers/mfd/da9055-core.c | 5 +++++ 1 file changed, 5 insertions(+) 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,