Messages in this thread | | | From | Mark-PK Tsai <> | Subject | Re: [PATCH v2] irqchip/irq-mst: Support polarity configuration | Date | Mon, 8 Mar 2021 22:30:11 +0800 |
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From: Daniel Palmer <daniel@0x0f.com>
>On Mon, 8 Mar 2021 at 15:05, Mark-PK Tsai <mark-pk.tsai@mediatek.com> wrote: >> +static int mst_irq_chip_set_type(struct irq_data *data, unsigned int type) > > +{ >> + if (type != IRQ_TYPE_LEVEL_LOW && type != IRQ_TYPE_LEVEL_HIGH) >> + return -EINVAL; >> + > >Does this mean we can't do rising or falling edge interrupts?
Yes, the interrupt of mst-intc is either level high or level low. Actually the input signal can be pulse, but it will be converted to level by the latch in mst-intc.
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