diff options
| author | Boris BREZILLON <boris.brezillon@free-electrons.com> | 2014-11-03 09:31:00 +0100 |
|---|---|---|
| committer | Jason Cooper <jason@lakedaemon.net> | 2014-11-09 05:36:38 +0100 |
| commit | 4185315a9ad3d2ae0ee2fdb7e8f2f75a3f3c5e66 (patch) | |
| tree | 09e8f3e20ed6f35ecb5d06a7b0fb14fa5337385c /drivers | |
| parent | Linux 3.18-rc1 (diff) | |
| download | linux-4185315a9ad3d2ae0ee2fdb7e8f2f75a3f3c5e66.tar.xz linux-4185315a9ad3d2ae0ee2fdb7e8f2f75a3f3c5e66.zip | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/irqchip/irq-atmel-aic-common.c | 26 | ||||
| -rw-r--r-- | drivers/irqchip/irq-atmel-aic-common.h | 2 |
2 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 6ae3cdee0681..656cfe336837 100644 --- a/drivers/irqchip/irq-atmel-aic-common.c +++ b/drivers/irqchip/irq-atmel-aic-common.c @@ -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("/"); diff --git a/drivers/irqchip/irq-atmel-aic-common.h b/drivers/irqchip/irq-atmel-aic-common.h index 90aa00e918d6..603f0a9d5411 100644 --- a/drivers/irqchip/irq-atmel-aic-common.h +++ b/drivers/irqchip/irq-atmel-aic-common.h @@ -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 */ |