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>
diff --git a/drivers/irqchip/irq-atmel-aic-common.c b/drivers/irqchip/irq-atmel-aic-common.c
index 6ae3cdee..656cfe3 100644
--- a/drivers/irqchip/irq-atmel-aic-common.c
+++ b/drivers/irqchip/irq-atmel-aic-common.c
@@ -167,6 +167,32 @@
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("/");