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Commit 4b3b4a50 authored by Ankur Raina's avatar Ankur Raina Committed by Samuel Ortiz
Browse files

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: default avatarAnkur Raina <Ankur.Raina@kpitcummins.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent aa32acad

drivers/mfd/da9055-core.c

+5 −0
Original line number Original line Diff line number Diff line
@@ -381,6 +381,7 @@ int da9055_device_init(struct da9055 *da9055) 
{

{

	struct da9055_pdata *pdata = da9055->dev->platform_data;

	struct da9055_pdata *pdata = da9055->dev->platform_data;

	int ret;

	int ret;

	uint8_t clear_events[3] = {0xFF, 0xFF, 0xFF};





	if (pdata && pdata->init != NULL)

	if (pdata && pdata->init != NULL)

		pdata->init(da9055);

		pdata->init(da9055);
@@ -390,6 +391,10 @@ int da9055_device_init(struct da9055 *da9055) 
	else

	else

		da9055->irq_base = pdata->irq_base;

		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,

	ret = regmap_add_irq_chip(da9055->regmap, da9055->chip_irq,

				  IRQF_TRIGGER_LOW | IRQF_ONESHOT,

				  IRQF_TRIGGER_LOW | IRQF_ONESHOT,

				  da9055->irq_base, &da9055_regmap_irq_chip,

				  da9055->irq_base, &da9055_regmap_irq_chip,