Commit 02d02728 authored Apr 01, 2014 by Peter Ujfalusi Committed by Lee Jones Jun 03, 2014

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 <peter.ujfalusi@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

parent d137be00

drivers/mfd/twl6040.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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,

Admin message