On 2/27/25 5:24 AM, Yixun Lan wrote:
The is a prerequisite patch to support parsing three-cell
interrupts which encoded as <instance hwirq irqflag>,
the translate function will always retrieve irq number and
flag from last two cells.
Signed-off-by: Yixun Lan <dlan@xxxxxxxxxx>
---
kernel/irq/irqdomain.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index ec6d8e72d980f604ded2bfa2143420e0e0095920..cb874ab5e54a4763d601122becd63b6d759e55d2 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -1208,10 +1208,17 @@ int irq_domain_translate_twocell(struct irq_domain *d,
unsigned long *out_hwirq,
unsigned int *out_type)
{
This function is meant for "twocell". There is also another function
irq_domain_translate_onecell(). Why don't you just create
irq_domain_translate_threecell" instead?
-Alex
+ u32 irq, type;
+
if (WARN_ON(fwspec->param_count < 2))
return -EINVAL;
- *out_hwirq = fwspec->param[0];
- *out_type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK;
+
+ irq = fwspec->param_count - 2;
+ type = fwspec->param_count - 1;
+
+ *out_hwirq = fwspec->param[irq];
+ *out_type = fwspec->param[type] & IRQ_TYPE_SENSE_MASK;
+
return 0;
}
EXPORT_SYMBOL_GPL(irq_domain_translate_twocell);
