diff options
author | James Hogan <james.hogan@imgtec.com> | 2012-10-09 10:54:47 +0100 |
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committer | James Hogan <james.hogan@imgtec.com> | 2013-03-02 20:09:48 +0000 |
commit | 5698c50d9da4ab2f57d98c64ea97675dcaf2a608 (patch) | |
tree | 5b82a24daa8bbb85703489340cbfdcb00a2f20a4 /include/linux/irqchip | |
parent | 63047ea36070d11f902ab7d09a5a18aea037c0f7 (diff) | |
download | op-kernel-dev-5698c50d9da4ab2f57d98c64ea97675dcaf2a608.zip op-kernel-dev-5698c50d9da4ab2f57d98c64ea97675dcaf2a608.tar.gz |
metag: Internal and external irqchips
Meta core internal interrupts (from HWSTATMETA and friends) are vectored
onto the TR1 core trigger for the current thread. This is demultiplexed
in irq-metag.c to individual Linux IRQs for each internal interrupt.
External SoC interrupts (from HWSTATEXT and friends) are vectored onto
the TR2 core trigger for the current thread. This is demultiplexed in
irq-metag-ext.c to individual Linux IRQs for each external SoC interrupt.
The external irqchip has devicetree bindings for configuring the number
of irq banks and the type of masking available.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Rob Landley <rob@landley.net>
Cc: Dom Cobley <popcornmix@gmail.com>
Cc: Simon Arlott <simon@fire.lp0.eu>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: linux-doc@vger.kernel.org
Diffstat (limited to 'include/linux/irqchip')
-rw-r--r-- | include/linux/irqchip/metag-ext.h | 33 | ||||
-rw-r--r-- | include/linux/irqchip/metag.h | 24 |
2 files changed, 57 insertions, 0 deletions
diff --git a/include/linux/irqchip/metag-ext.h b/include/linux/irqchip/metag-ext.h new file mode 100644 index 0000000..697af0f --- /dev/null +++ b/include/linux/irqchip/metag-ext.h @@ -0,0 +1,33 @@ +/* + * Copyright (C) 2012 Imagination Technologies + */ + +#ifndef _LINUX_IRQCHIP_METAG_EXT_H_ +#define _LINUX_IRQCHIP_METAG_EXT_H_ + +struct irq_data; +struct platform_device; + +/* called from core irq code at init */ +int init_external_IRQ(void); + +/* + * called from SoC init_irq() callback to dynamically indicate the lack of + * HWMASKEXT registers. + */ +void meta_intc_no_mask(void); + +/* + * These allow SoCs to specialise the interrupt controller from their init_irq + * callbacks. + */ + +extern struct irq_chip meta_intc_edge_chip; +extern struct irq_chip meta_intc_level_chip; + +/* this should be called in the mask callback */ +void meta_intc_mask_irq_simple(struct irq_data *data); +/* this should be called in the unmask callback */ +void meta_intc_unmask_irq_simple(struct irq_data *data); + +#endif /* _LINUX_IRQCHIP_METAG_EXT_H_ */ diff --git a/include/linux/irqchip/metag.h b/include/linux/irqchip/metag.h new file mode 100644 index 0000000..4ebdfb3 --- /dev/null +++ b/include/linux/irqchip/metag.h @@ -0,0 +1,24 @@ +/* + * Copyright (C) 2011 Imagination Technologies + */ + +#ifndef _LINUX_IRQCHIP_METAG_H_ +#define _LINUX_IRQCHIP_METAG_H_ + +#include <linux/errno.h> + +#ifdef CONFIG_METAG_PERFCOUNTER_IRQS +extern int init_internal_IRQ(void); +extern int internal_irq_map(unsigned int hw); +#else +static inline int init_internal_IRQ(void) +{ + return 0; +} +static inline int internal_irq_map(unsigned int hw) +{ + return -EINVAL; +} +#endif + +#endif /* _LINUX_IRQCHIP_METAG_H_ */ |