From 02d02728ea8bb33dee221d7dcfeb3022d7635927 Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Tue, 1 Apr 2014 16:45:01 +0300 Subject: [PATCH] mfd: twl6040: Clear the interrupt ID register before requesting IRQ If for some reason the boot loader enabled the audpwron GPIO we will have pending IRQs to be handled. This seams to break twl6040 for some reason leading to non working i2c communication (i2c timeouts). Clearing the INTID register after we requested the audpwron GPIO (and set it to low) will ensure that the chip will operate normally in this case as well. Signed-off-by: Peter Ujfalusi Signed-off-by: Lee Jones --- drivers/mfd/twl6040.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c index 6e88f25832fb..03dbff3597a2 100644 --- a/drivers/mfd/twl6040.c +++ b/drivers/mfd/twl6040.c @@ -679,6 +679,9 @@ static int twl6040_probe(struct i2c_client *client, GPIOF_OUT_INIT_LOW, "audpwron"); if (ret) goto gpio_err; + + /* Clear any pending interrupt */ + twl6040_reg_read(twl6040, TWL6040_REG_INTID); } ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT, -- 2.20.1