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@xxxxxxxxxxx>
---
drivers/soc/qcom/smsm.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/soc/qcom/smsm.c b/drivers/soc/qcom/smsm.c
index 1d3d5e3ec2b0..a48f9db98836 100644
--- a/drivers/soc/qcom/smsm.c
+++ b/drivers/soc/qcom/smsm.c
@@ -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,
};
/**
--
2.32.0
