microblaze: Add irq_create_{of_,}mapping functions (c6ba01a4) · Commits · 戴 / test

arch/microblaze/include/asm/irq.h

+36 −1

Original line number	Diff line number	Diff line
		@@ -14,6 +14,12 @@

		#include <linux/interrupt.h>

		/* This type is the placeholder for a hardware interrupt number. It has to
		* be big enough to enclose whatever representation is used by a given
		* platform.
		*/
		typedef unsigned long irq_hw_number_t;

		extern unsigned int nr_irq;

		#define NO_IRQ (-1)
		@@ -21,7 +27,8 @@ extern unsigned int nr_irq;
		struct pt_regs;
		extern void do_IRQ(struct pt_regs *regs);

		/* irq_of_parse_and_map - Parse and Map an interrupt into linux virq space
		/**
		* irq_of_parse_and_map - Parse and Map an interrupt into linux virq space
		* @device: Device node of the device whose interrupt is to be mapped
		* @index: Index of the interrupt to map
		*
		@@ -40,4 +47,32 @@ static inline void irq_dispose_mapping(unsigned int virq)
		return;
		}

		struct irq_host;

		/**
		* irq_create_mapping - Map a hardware interrupt into linux virq space
		* @host: host owning this hardware interrupt or NULL for default host
		* @hwirq: hardware irq number in that host space
		*
		* Only one mapping per hardware interrupt is permitted. Returns a linux
		* virq number.
		* If the sense/trigger is to be specified, set_irq_type() should be called
		* on the number returned from that call.
		*/
		extern unsigned int irq_create_mapping(struct irq_host *host,
		irq_hw_number_t hwirq);

		/**
		* irq_create_of_mapping - Map a hardware interrupt into linux virq space
		* @controller: Device node of the interrupt controller
		* @inspec: Interrupt specifier from the device-tree
		* @intsize: Size of the interrupt specifier from the device-tree
		*
		* This function is identical to irq_create_mapping except that it takes
		* as input informations straight from the device-tree (typically the results
		* of the of_irq_map_*() functions.
		*/
		extern unsigned int irq_create_of_mapping(struct device_node *controller,
		u32 *intspec, unsigned int intsize);

		#endif /* _ASM_MICROBLAZE_IRQ_H */

arch/microblaze/kernel/irq.c

+15 −0

Original line number	Diff line number	Diff line
		@@ -93,3 +93,18 @@ skip:
		}
		return 0;
		}

		/* MS: There is no any advance mapping mechanism. We are using simple 32bit
		intc without any cascades or any connection that's why mapping is 1:1 */
		unsigned int irq_create_mapping(struct irq_host *host, irq_hw_number_t hwirq)
		{
		return hwirq;
		}
		EXPORT_SYMBOL_GPL(irq_create_mapping);

		unsigned int irq_create_of_mapping(struct device_node *controller,
		u32 *intspec, unsigned int intsize)
		{
		return intspec[0];
		}
		EXPORT_SYMBOL_GPL(irq_create_of_mapping);

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