Commit c73a6852 authored by Stephan Gerhold's avatar Stephan Gerhold Committed by Bjorn Andersson
Browse files

soc: qcom: smsm: Implement support for get_irqchip_state 



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: default avatarStephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20210712135703.324748-1-stephan@gerhold.net


Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
parent ad68c620

drivers/soc/qcom/smsm.c

+17 −0
Original line number Diff line number Diff line
@@ -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,

};



/**