On 8/29/2024 11:52 AM, Rob Herring wrote:

On Wed, Aug 28, 2024 at 01:37:20PM -0700, Nikunj Kela wrote:

quoted

Add interrupt specifier for extended SPI interrupts.

What's an "extended SPI"? Is this a GIC spec thing? If so, what version?

Extended SPI is an extended range of SPI interrupts supported by GIC.

Excerpt below from
Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml

"The 1st cell is the interrupt type; 0 for SPI interrupts, 1 for PPI
interrupts, 2 for interrupts in the Extended SPI range, 3 for the
Extended PPI range. Other values are reserved for future use."

"The 2nd cell contains the interrupt number for the interrupt type. SPI
interrupts are in the range [0-987]. PPI interrupts are in the range
[0-15]. Extented SPI interrupts are in the range [0-1023]. Extended PPI
interrupts are in the range [0-127]."

quoted

Qualcomm SA8255p platform uses extended SPI for SCMI 'a2p' doorbells.

Signed-off-by: Nikunj Kela <redacted>
---
 include/dt-bindings/interrupt-controller/arm-gic.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/dt-bindings/interrupt-controller/arm-gic.h b/include/dt-bindings/interrupt-controller/arm-gic.h
index 35b6f69b7db6..9c06248446b7 100644
--- a/include/dt-bindings/interrupt-controller/arm-gic.h
+++ b/include/dt-bindings/interrupt-controller/arm-gic.h

@@ -12,6 +12,7 @@
 
 #define GIC_SPI 0
 #define GIC_PPI 1
+#define GIC_ESPI 2
 
 /*
  * Interrupt specifier cell 2.

-- 
2.34.1