On Friday 20 November 2015 17:17:13 Joshua Henderson wrote:
> +Example
> +-------
> +
> +evic: interrupt-controller@1f810000 {
> + compatible = "microchip,evic-v2";
> + interrupt-controller;
> + #interrupt-cells = <3>;
> + reg = <0x1f810000 0x1000>;
> + device_type="evic-v2";
> +};
This is not a correct use of device_type. Just drop that property.
> diff --git a/include/dt-bindings/interrupt-controller/microchip,pic32mz-evic.h b/include/dt-bindings/interrupt-controller/microchip,pic32mz-evic.h
> new file mode 100644
> index 0000000..2c466b8
> --- /dev/null
> +++ b/include/dt-bindings/interrupt-controller/microchip,pic32mz-evic.h
> @@ -0,0 +1,238 @@
> +/*
> + * This header provides constants for the MICROCHIP PIC32 EVIC.
> + */
> +
> +#ifndef _DT_BINDINGS_INTERRUPT_CONTROLLER_MICROCHIP_EVIC_H
> +#define _DT_BINDINGS_INTERRUPT_CONTROLLER_MICROCHIP_EVIC_H
> +
> +#include <dt-bindings/interrupt-controller/irq.h>
> +
> +/* Hardware interrupt number */
> +#define CORE_TIMER_INTERRUPT 0
> +#define CORE_SOFTWARE_INTERRUPT_0 1
> +#define CORE_SOFTWARE_INTERRUPT_1 2
> +#define EXTERNAL_INTERRUPT_0 3
> +#define TIMER1 4
A header file like this is just going to make everyone's life
miserable. Try to remove as much as possible here: normally
you can just use the numbers from the data sheet that match
the actual hardware registers, and put them into the dts file.
> +/* Interrupt priority bits */
> +#define PRI_0 0 /* Note:This priority disables the interrupt! */
> +#define PRI_1 1
> +#define PRI_2 2
> +#define PRI_3 3
> +#define PRI_4 4
> +#define PRI_5 5
> +#define PRI_6 6
> +#define PRI_7 7
> +/* Interrupt subpriority bits */
> +#define SUB_PRI_0 0
> +#define SUB_PRI_1 1
> +#define SUB_PRI_2 2
> +#define SUB_PRI_3 3
These are obviously silly and should be removed/
> +#define PRI_MASK 0x7 /* 3 bit priority mask */
> +#define SUBPRI_MASK 0x3 /* 2 bit subpriority mask */
> +#define INT_MASK 0x1F /* 5 bit pri and subpri mask */
> +#define NR_EXT_IRQS 5 /* 5 external interrupts sources */
> +
> +#define MICROCHIP_EVIC_MIN_PRIORITY 0
> +#define MICROCHIP_EVIC_MAX_PRIORITY INT_MASK
> +
> +#define INT_PRI(pri, subpri) \
> + (((pri & PRI_MASK) << 2) | (subpri & SUBPRI_MASK))
> +
> +#define DEFINE_INT(irq, pri) { irq, pri }
> +
> +#define DEFAULT_INT_PRI INT_PRI(2, 0)
Is it required to have a specific priority configured for each line?
If these are software selectable, it's probably better to not put
them into DT in the first place.
If you absolutely need them, I would suggest using two separate cells
for pri and subpri so you can avoid the macro.
Arnd
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