[Xen-devel] [for-4.7 1/5] drivers/pl011: ACPI: The interrupt should always be high level triggered

[Julien Grall <julien.grall@xxxxxxx>]

The SPCR does not specify if the interrupt is edge or level triggered.
So the configuration needs to be hardcoded in the code.

Based on the PL011 TRM (see 2.2.8 in ARM DDI 0183G), the interrupt generated
will be active high. This wording implies the interrupt should be high level
triggered. Note that a rising edge triggered interrupt would be described as
"high going edge".

Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
---
 xen/drivers/char/pl011.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/drivers/char/pl011.c b/xen/drivers/char/pl011.c
index fa22edf..88d8488 100644
--- a/xen/drivers/char/pl011.c
+++ b/xen/drivers/char/pl011.c
@@ -327,7 +327,7 @@ static int __init pl011_acpi_uart_init(const void *data)
     }
 
     /* trigger/polarity information is not available in spcr */
-    irq_set_type(spcr->interrupt, IRQ_TYPE_EDGE_BOTH);
+    irq_set_type(spcr->interrupt, IRQ_TYPE_LEVEL_MASK);
 
     res = pl011_uart_init(spcr->interrupt, spcr->serial_port.address,
                           PAGE_SIZE);
-- 
1.9.1


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