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Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull irq updates from Thomas Gleixner:
 "The irq departement delivers:

   - a cleanup series to get rid of mindlessly copied code.

   - another bunch of new pointlessly different interrupt chip drivers.

     Adding homebrewn irq chips (and timers) to SoCs must provide a
     value add which is beyond the imagination of mere mortals.

   - the usual SoC irq controller updates, IOW my second cat herding
     project"

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (44 commits)
  irqchip: gic-v3: Implement CPU PM notifier
  irqchip: gic-v3: Refactor gic_enable_redist to support both enabling and disabling
  irqchip: renesas-intc-irqpin: Add minimal runtime PM support
  irqchip: renesas-intc-irqpin: Add helper variable dev = &pdev->dev
  irqchip: atmel-aic5: Add sama5d4 support
  irqchip: atmel-aic5: The sama5d3 has 48 IRQs
  Documentation: bcm7120-l2: Add Broadcom BCM7120-style L2 binding
  irqchip: bcm7120-l2: Add Broadcom BCM7120-style Level 2 interrupt controller
  irqchip: renesas-irqc: Add binding docs for new R-Car Gen2 SoCs
  irqchip: renesas-irqc: Add DT binding documentation
  irqchip: renesas-intc-irqpin: Document SoC-specific bindings
  openrisc: Get rid of handle_IRQ
  arm64: Get rid of handle_IRQ
  ARM: omap2: irq: Convert to handle_domain_irq
  ARM: imx: tzic: Convert to handle_domain_irq
  ARM: imx: avic: Convert to handle_domain_irq
  irqchip: or1k-pic: Convert to handle_domain_irq
  irqchip: atmel-aic5: Convert to handle_domain_irq
  irqchip: atmel-aic: Convert to handle_domain_irq
  irqchip: gic-v3: Convert to handle_domain_irq
  ...
This commit is contained in:
Linus Torvalds 2014-10-09 06:42:04 -04:00
commit 782d59c5df
45 changed files with 1357 additions and 204 deletions
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3
kernel/irq/Kconfig
View file

@ -55,6 +55,9 @@ config GENERIC_IRQ_CHIP
config IRQ_DOMAIN
bool
config HANDLE_DOMAIN_IRQ
bool
config IRQ_DOMAIN_DEBUG
bool "Expose hardware/virtual IRQ mapping via debugfs"
depends on IRQ_DOMAIN && DEBUG_FS

42
kernel/irq/irqdesc.c
View file

@ -14,6 +14,7 @@
#include <linux/kernel_stat.h>
#include <linux/radix-tree.h>
#include <linux/bitmap.h>
#include <linux/irqdomain.h>
#include "internals.h"
@ -336,6 +337,47 @@ int generic_handle_irq(unsigned int irq)
}
EXPORT_SYMBOL_GPL(generic_handle_irq);
#ifdef CONFIG_HANDLE_DOMAIN_IRQ
/**
* __handle_domain_irq - Invoke the handler for a HW irq belonging to a domain
* @domain: The domain where to perform the lookup
* @hwirq: The HW irq number to convert to a logical one
* @lookup: Whether to perform the domain lookup or not
* @regs: Register file coming from the low-level handling code
*
* Returns: 0 on success, or -EINVAL if conversion has failed
*/
int __handle_domain_irq(struct irq_domain *domain, unsigned int hwirq,
bool lookup, struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
unsigned int irq = hwirq;
int ret = 0;
irq_enter();
#ifdef CONFIG_IRQ_DOMAIN
if (lookup)
irq = irq_find_mapping(domain, hwirq);
#endif
/*
* Some hardware gives randomly wrong interrupts. Rather
* than crashing, do something sensible.
*/
if (unlikely(!irq || irq >= nr_irqs)) {
ack_bad_irq(irq);
ret = -EINVAL;
} else {
generic_handle_irq(irq);
}
irq_exit();
set_irq_regs(old_regs);
return ret;
}
#endif
/* Dynamic interrupt handling */
/**