Hello li jie,
To add IRQ in dts file, you may try something like:
irq@50000 {
compatible = "irq";
reg = <0x50000 0x160>;
interrupts = <interrupt-number level-sense interrupt-type type-specific>;
};
The four cell description is in /Documentation\devicetree\bindings\powerpc\fsl\mpic.txt as:
<1st-cell> interrupt-number
Identifies the interrupt source. The meaning
depends on the type of interrupt.
Note: If the interrupt-type cell is undefined
(i.e. #interrupt-cells = 2), this cell
should be interpreted the same as for
interrupt-type 0-- i.e. an external or
normal SoC device interrupt.
<2nd-cell> level-sense information, encoded as follows:
0 = low-to-high edge triggered
1 = active low level-sensitive
2 = active high level-sensitive
3 = high-to-low edge triggered
<3rd-cell> interrupt-type
The following types are supported:
0 = external or normal SoC device interrupt
The interrupt-number cell contains
the SoC device interrupt number. The
type-specific cell is undefined. The
interrupt-number is derived from the
MPIC a block of registers referred to as
the "Interrupt Source Configuration Registers".
Each source has 32-bytes of registers
(vector/priority and destination) in this
region. So interrupt 0 is at offset 0x0,
interrupt 1 is at offset 0x20, and so on.
1 = error interrupt
The interrupt-number cell contains
the SoC device interrupt number for
the error interrupt. The type-specific
cell identifies the specific error
interrupt number.
2 = MPIC inter-processor interrupt (IPI)
The interrupt-number cell identifies
the MPIC IPI number. The type-specific
cell is undefined.
3 = MPIC timer interrupt
The interrupt-number cell identifies
the MPIC timer number. The type-specific
cell is undefined.
<4th-cell> type-specific information
The type-specific cell is encoded as follows:
- For interrupt-type 1 (error interrupt),
the type-specific cell contains the
bit number of the error interrupt in the
Error Interrupt Summary Register.
But from your other thread, you specify the IRQ is connected to reset button. I am puzzled here about your logic, is this hard reset signal? This signal is also used to trigger external interrupt? Can you please be more specific on this?
P1010E connected to AR8035 and IRQ1 to reset help!!!!!
Have a great day,
Lunmin
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