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authorBoris BREZILLON <boris.brezillon@free-electrons.com>2014-07-10 20:25:40 +0200
committerJason Cooper <jason@lakedaemon.net>2014-07-17 15:38:54 +0200
commit3d61467f9bab36aee786f762730b73565dbef3bf (patch)
tree233f2998088b3e660005aafc68b2c06bf289d9c1 /drivers/irqchip/irq-atmel-aic-common.c
parentirqchip: atmel-aic: Add irq fixup infrastructure (diff)
downloadlinux-3d61467f9bab36aee786f762730b73565dbef3bf.tar.xz
linux-3d61467f9bab36aee786f762730b73565dbef3bf.zip
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>
Diffstat (limited to 'drivers/irqchip/irq-atmel-aic-common.c')
-rw-r--r--drivers/irqchip/irq-atmel-aic-common.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-atmel-aic-common.c b/drivers/irqchip/irq-atmel-aic-common.c
index 4705bdbc6e7b..6ae3cdee0681 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("/");