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irqchip: atmel-aic: Implement RTC irq fixup 

Provide an implementation to fix RTC irqs before enabling the irqchip.

This was previously done in arch/arm/mach-at91/sysirq_mask.c but as we're
trying to use standard implementation (IRQCHIP_DECLARE and automatic call
of irqchip_init within arch/arm/kernel/irq.c) we need to do those fixups
in the irqchip driver.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Link: https://lkml.kernel.org/r/1405016741-2407-3-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
hifive-unleashed-5.1
Boris BREZILLON 2014-07-10 20:25:40 +02:00 committed by Jason Cooper
parent b2f579b58e
commit 3d61467f9b
2 changed files with 30 additions and 0 deletions
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28
drivers/irqchip/irq-atmel-aic-common.c
View File

@ -139,6 +139,34 @@ static void __init aic_common_ext_irq_of_init(struct irq_domain *domain)
}
}
#define AT91_RTC_IDR 0x24
#define AT91_RTC_IMR 0x28
#define AT91_RTC_IRQ_MASK 0x1f
void __init aic_common_rtc_irq_fixup(struct device_node *root)
{
struct device_node *np;
void __iomem *regs;
np = of_find_compatible_node(root, NULL, "atmel,at91rm9200-rtc");
if (!np)
np = of_find_compatible_node(root, NULL,
"atmel,at91sam9x5-rtc");
if (!np)
return;
regs = of_iomap(np, 0);
of_node_put(np);
if (!regs)
return;
writel(AT91_RTC_IRQ_MASK, regs + AT91_RTC_IDR);
iounmap(regs);
}
void __init aic_common_irq_fixup(const struct of_device_id *matches)
{
struct device_node *root = of_find_node_by_path("/");

2
drivers/irqchip/irq-atmel-aic-common.h
View File

@ -32,6 +32,8 @@ struct irq_domain *__init aic_common_of_init(struct device_node *node,
const struct irq_domain_ops *ops,
const char *name, int nirqs);
void __init aic_common_rtc_irq_fixup(struct device_node *root);
void __init aic_common_irq_fixup(const struct of_device_id *matches);
#endif /* __IRQ_ATMEL_AIC_COMMON_H */