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Subject[PATCH 2/3] irqchip: atmel-aic: Implement RTC irq fixup
Date
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>
---
drivers/irqchip/irq-atmel-aic-common.c | 28 ++++++++++++++++++++++++++++
drivers/irqchip/irq-atmel-aic-common.h | 2 ++
2 files changed, 30 insertions(+)

diff --git a/drivers/irqchip/irq-atmel-aic-common.c b/drivers/irqchip/irq-atmel-aic-common.c
index 4705bdb..6ae3cdee 100644
--- a/drivers/irqchip/irq-atmel-aic-common.c
+++ b/drivers/irqchip/irq-atmel-aic-common.c
@@ -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("/");
diff --git a/drivers/irqchip/irq-atmel-aic-common.h b/drivers/irqchip/irq-atmel-aic-common.h
index aa0a42c..90aa00e 100644
--- a/drivers/irqchip/irq-atmel-aic-common.h
+++ b/drivers/irqchip/irq-atmel-aic-common.h
@@ -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 */
--
1.8.3.2


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