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irqchip: atmel-aic: Add irq fixup for RTT block 

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Link: https://lkml.kernel.org/r/1415003464-29239-2-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Boris BREZILLON 2014-11-03 09:31:00 +01:00 committed by Jason Cooper
parent f114040e3e
commit 4185315a9a
2 changed files with 28 additions and 0 deletions
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26
drivers/irqchip/irq-atmel-aic-common.c
View File

@ -167,6 +167,32 @@ void __init aic_common_rtc_irq_fixup(struct device_node *root)
iounmap(regs);
}
#define AT91_RTT_MR 0x00 /* Real-time Mode Register */
#define AT91_RTT_ALMIEN (1 << 16) /* Alarm Interrupt Enable */
#define AT91_RTT_RTTINCIEN (1 << 17) /* Real Time Timer Increment Interrupt Enable */
void __init aic_common_rtt_irq_fixup(struct device_node *root)
{
struct device_node *np;
void __iomem *regs;
/*
* The at91sam9263 SoC has 2 instances of the RTT block, hence we
* iterate over the DT to find each occurrence.
*/
for_each_compatible_node(np, NULL, "atmel,at91sam9260-rtt") {
regs = of_iomap(np, 0);
if (!regs)
continue;
writel(readl(regs + AT91_RTT_MR) &
~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN),
regs + AT91_RTT_MR);
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

@ -34,6 +34,8 @@ struct irq_domain *__init aic_common_of_init(struct device_node *node,
void __init aic_common_rtc_irq_fixup(struct device_node *root);
void __init aic_common_rtt_irq_fixup(struct device_node *root);
void __init aic_common_irq_fixup(const struct of_device_id *matches);
#endif /* __IRQ_ATMEL_AIC_COMMON_H */