Re: [PATCH 1/3] mfd: cpcap: Fix interrupt to use level interrupt

Lee Jones
2017-04-11T09:54:51Z

On Mon, 03 Apr 2017, Tony Lindgren wrote:

> I made a mistake assuming the device tree configuration for interrupt
> triggering was somehow passed to the SPI device but it's not.
>
> In the Motorola Linux kernel tree CPCAP PMIC is configured as a rising
> edge triggered interrupt, but then then it's interrupt handler keeps
> looping until the GPIO line goes down. So the CPCAP interrupt is clearly
> a level interrupt and not an edge interrupt.
>
> Earlier when I tried to configure it as level interrupt using the
> device tree, I did not account that the triggering only gets passed
> to the SPI core and it also needs to be specified in the CPCAP driver
> when we do devm_regmap_add_irq_chip().
>
> Fixes: 56e1d40d3bea ("mfd: cpcap: Add minimal support")
> Cc: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
> Cc: Marcel Partap <mpartap@gmx.net>
> Cc: Michael Scott <michael.scott@linaro.org>
> Cc: Sebastian Reichel <sre@kernel.org>
> Signed-off-by: Tony Lindgren <tony@atomide.com>
> ---
> drivers/mfd/motorola-cpcap.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)

Applied, thanks.

> diff --git a/drivers/mfd/motorola-cpcap.c b/drivers/mfd/motorola-cpcap.c
> --- a/drivers/mfd/motorola-cpcap.c
> +++ b/drivers/mfd/motorola-cpcap.c
> @@ -126,7 +126,7 @@ static int cpcap_init_irq_chip(struct cpcap_ddata *cpcap, int irq_chip,
>
> ret = devm_regmap_add_irq_chip(&cpcap->spi->dev, cpcap->regmap,
> cpcap->spi->irq,
> - IRQF_TRIGGER_RISING |
> + irq_get_trigger_type(cpcap->spi->irq) |
> IRQF_SHARED, -1,
> chip, &cpcap->irqdata[irq_chip]);
> if (ret) {

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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