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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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7dc2e1134a
Merge common irq mapping code between PowerPC and Microblaze. This patch merges of_irq_find_parent(), of_irq_map_raw() and of_irq_map_one(). The functions are dependent on one another, so all three are merged in a single patch. Other than cosmetic difference (ie. DBG() vs. pr_debug()), the implementations are identical. of_irq_to_resource() is also merged, but in this case the implementations are different. This patch drops the microblaze version and uses the powerpc implementation unchanged. The microblaze version essentially open-coded irq_of_parse_and_map() which it does not need to do. Therefore the powerpc version is safe to adopt. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Michal Simek <monstr@monstr.eu> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Stephen Rothwell <sfr@canb.auug.org.au>
71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
#ifndef __OF_IRQ_H
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#define __OF_IRQ_H
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#if defined(CONFIG_OF)
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struct of_irq;
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/of.h>
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/*
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* irq_of_parse_and_map() is used ba all OF enabled platforms; but SPARC
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* implements it differently. However, the prototype is the same for all,
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* so declare it here regardless of the CONFIG_OF_IRQ setting.
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*/
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extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
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#if defined(CONFIG_OF_IRQ)
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/**
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* of_irq - container for device_node/irq_specifier pair for an irq controller
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* @controller: pointer to interrupt controller device tree node
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* @size: size of interrupt specifier
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* @specifier: array of cells @size long specifing the specific interrupt
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*
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* This structure is returned when an interrupt is mapped. The controller
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* field needs to be put() after use
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*/
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#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
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struct of_irq {
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struct device_node *controller; /* Interrupt controller node */
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u32 size; /* Specifier size */
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u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
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};
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/*
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* Workarounds only applied to 32bit powermac machines
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*/
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#define OF_IMAP_OLDWORLD_MAC 0x00000001
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#define OF_IMAP_NO_PHANDLE 0x00000002
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#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
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extern unsigned int of_irq_workarounds;
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extern struct device_node *of_irq_dflt_pic;
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extern int of_irq_map_oldworld(struct device_node *device, int index,
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struct of_irq *out_irq);
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#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
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#define of_irq_workarounds (0)
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#define of_irq_dflt_pic (NULL)
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static inline int of_irq_map_oldworld(struct device_node *device, int index,
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struct of_irq *out_irq)
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{
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return -EINVAL;
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}
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#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
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extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
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u32 ointsize, const u32 *addr,
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struct of_irq *out_irq);
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extern int of_irq_map_one(struct device_node *device, int index,
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struct of_irq *out_irq);
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extern unsigned int irq_create_of_mapping(struct device_node *controller,
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const u32 *intspec,
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unsigned int intsize);
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extern int of_irq_to_resource(struct device_node *dev, int index,
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struct resource *r);
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#endif /* CONFIG_OF_IRQ */
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#endif /* CONFIG_OF */
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#endif /* __OF_IRQ_H */
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