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gpio: intel_apl: don't enable interrupt if line is output

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Hardware does not seem to support triggering interrupts to
itself by setting line as both input/output and setting
output to desired level. So just say interrupt triggering
is not supported when line is set to output.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This commit is contained in:
Daniel Leung 2020-05-15 15:33:15 -07:00 • committed by Carles Cufí
commit e4734e088a
1 changed files with 11 additions and 0 deletions
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11
drivers/gpio/gpio_intel_apl.c
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@ -333,6 +333,17 @@ static int gpio_intel_apl_pin_interrupt_configure(struct device *dev,
return -ENOTSUP;
}
/*
* Do not enable interrupt with pin as output.
* Hardware does not seem to support triggering
* interrupt by setting line as both input/output
* and then setting output to desired level.
* So just say not supported.
*/
if ((cfg0 & PAD_CFG0_TXDIS) == 0U) {
return -ENOTSUP;
}
if (mode == GPIO_INT_MODE_LEVEL) {
/* level trigger */
cfg0 |= PAD_CFG0_RXEVCFG_LEVEL;