irq.c 1.0 KB

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  1. /*
  2. * arch/arm/plat-orion/irq.c
  3. *
  4. * Marvell Orion SoC IRQ handling.
  5. *
  6. * This file is licensed under the terms of the GNU General Public
  7. * License version 2. This program is licensed "as is" without any
  8. * warranty of any kind, whether express or implied.
  9. */
  10. #include <linux/kernel.h>
  11. #include <linux/init.h>
  12. #include <linux/irq.h>
  13. #include <linux/irqdomain.h>
  14. #include <linux/io.h>
  15. #include <linux/of_address.h>
  16. #include <linux/of_irq.h>
  17. #include <asm/exception.h>
  18. #include <plat/irq.h>
  19. #include <plat/orion-gpio.h>
  20. void __init orion_irq_init(unsigned int irq_start, void __iomem *maskaddr)
  21. {
  22. struct irq_chip_generic *gc;
  23. struct irq_chip_type *ct;
  24. /*
  25. * Mask all interrupts initially.
  26. */
  27. writel(0, maskaddr);
  28. gc = irq_alloc_generic_chip("orion_irq", 1, irq_start, maskaddr,
  29. handle_level_irq);
  30. ct = gc->chip_types;
  31. ct->chip.irq_mask = irq_gc_mask_clr_bit;
  32. ct->chip.irq_unmask = irq_gc_mask_set_bit;
  33. irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_MASK_CACHE,
  34. IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
  35. }