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soc: qcom: smsm: Implement support for get_irqchip_state

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At the moment there is no way for drivers to get the current state
of the interrupt signal reported by a remote processor. The irqchip
API has generic functionality for this, using irq_get_irqchip_state().

Implement support for getting the IRQCHIP_STATE_LINE_LEVEL by reading
the remote state and checking the bit for the specified IRQ.

Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20210712135703.324748-1-stephan@gerhold.net
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Stephan Gerhold 2021-07-12 15:57:02 +02:00 committed by Bjorn Andersson
parent ad68c620b7
commit c73a6852b4
1 changed files with 17 additions and 0 deletions
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17
drivers/soc/qcom/smsm.c
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@ -299,11 +299,28 @@ static int smsm_set_irq_type(struct irq_data *irqd, unsigned int type)
return 0;
}
static int smsm_get_irqchip_state(struct irq_data *irqd,
enum irqchip_irq_state which, bool *state)
{
struct smsm_entry *entry = irq_data_get_irq_chip_data(irqd);
irq_hw_number_t irq = irqd_to_hwirq(irqd);
u32 val;
if (which != IRQCHIP_STATE_LINE_LEVEL)
return -EINVAL;
val = readl(entry->remote_state);
*state = !!(val & BIT(irq));
return 0;
}
static struct irq_chip smsm_irq_chip = {
.name = "smsm",
.irq_mask = smsm_mask_irq,
.irq_unmask = smsm_unmask_irq,
.irq_set_type = smsm_set_irq_type,
.irq_get_irqchip_state = smsm_get_irqchip_state,
};
/**