diff options
Diffstat (limited to 'arch/avr32/mach-at32ap/intc.c')
| -rw-r--r-- | arch/avr32/mach-at32ap/intc.c | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/arch/avr32/mach-at32ap/intc.c b/arch/avr32/mach-at32ap/intc.c index 644a3fb8c16..994c4545e2b 100644 --- a/arch/avr32/mach-at32ap/intc.c +++ b/arch/avr32/mach-at32ap/intc.c @@ -22,6 +22,10 @@ struct intc { void __iomem *regs; struct irq_chip chip; struct sys_device sysdev; +#ifdef CONFIG_PM + unsigned long suspend_ipr; + unsigned long saved_ipr[64]; +#endif }; extern struct platform_device at32_intc0_device; @@ -138,8 +142,56 @@ fail: panic("Interrupt controller initialization failed!\n"); } +#ifdef CONFIG_PM +void intc_set_suspend_handler(unsigned long offset) +{ + intc0.suspend_ipr = offset; +} + +static int intc_suspend(struct sys_device *sdev, pm_message_t state) +{ + struct intc *intc = container_of(sdev, struct intc, sysdev); + int i; + + if (unlikely(!irqs_disabled())) { + pr_err("intc_suspend: called with interrupts enabled\n"); + return -EINVAL; + } + + if (unlikely(!intc->suspend_ipr)) { + pr_err("intc_suspend: suspend_ipr not initialized\n"); + return -EINVAL; + } + + for (i = 0; i < 64; i++) { + intc->saved_ipr[i] = intc_readl(intc, INTPR0 + 4 * i); + intc_writel(intc, INTPR0 + 4 * i, intc->suspend_ipr); + } + + return 0; +} + +static int intc_resume(struct sys_device *sdev) +{ + struct intc *intc = container_of(sdev, struct intc, sysdev); + int i; + + WARN_ON(!irqs_disabled()); + + for (i = 0; i < 64; i++) + intc_writel(intc, INTPR0 + 4 * i, intc->saved_ipr[i]); + + return 0; +} +#else +#define intc_suspend NULL +#define intc_resume NULL +#endif + static struct sysdev_class intc_class = { - .name = "intc", + .name = "intc", + .suspend = intc_suspend, + .resume = intc_resume, }; static int __init intc_init_sysdev(void) |