diff options
| author | Grant Likely <grant.likely@secretlab.ca> | 2012-02-24 08:07:06 -0700 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2012-02-24 09:47:23 -0700 |
| commit | abd2363f6a5f1030b935e0bdc15cf917313b3b10 (patch) | |
| tree | 1f4546497af8162a60573203c5b017e2f7fed1f5 | |
| parent | b4e518547da042fdc65bd4bdafd046fed13337d5 (diff) | |
irq_domain/mips: Allow irq_domain on MIPS
This patch makes IRQ_DOMAIN usable on MIPS. It uses an ugly workaround
to preserve current behaviour so that MIPS has time to add irq_domain
registration to the irq controller drivers. The workaround will be
removed in Linux v3.6
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
| -rw-r--r-- | arch/mips/Kconfig | 1 | ||||
| -rw-r--r-- | arch/mips/include/asm/irq.h | 5 | ||||
| -rw-r--r-- | arch/mips/kernel/prom.c | 14 | ||||
| -rw-r--r-- | kernel/irq/irqdomain.c | 12 |
4 files changed, 14 insertions, 18 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 5ab6e89603c..edbbae17e82 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2327,6 +2327,7 @@ config USE_OF bool "Flattened Device Tree support" select OF select OF_EARLY_FLATTREE + select IRQ_DOMAIN help Include support for flattened device tree machine descriptions. diff --git a/arch/mips/include/asm/irq.h b/arch/mips/include/asm/irq.h index 2354c870a63..fb698dc09bc 100644 --- a/arch/mips/include/asm/irq.h +++ b/arch/mips/include/asm/irq.h @@ -11,15 +11,12 @@ #include <linux/linkage.h> #include <linux/smp.h> +#include <linux/irqdomain.h> #include <asm/mipsmtregs.h> #include <irq.h> -static inline void irq_dispose_mapping(unsigned int virq) -{ -} - #ifdef CONFIG_I8259 static inline int irq_canonicalize(int irq) { diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c index 6b8b4208481..558b5395795 100644 --- a/arch/mips/kernel/prom.c +++ b/arch/mips/kernel/prom.c @@ -60,20 +60,6 @@ void __init early_init_dt_setup_initrd_arch(unsigned long start, } #endif -/* - * irq_create_of_mapping - Hook to resolve OF irq specifier into a Linux irq# - * - * Currently the mapping mechanism is trivial; simple flat hwirq numbers are - * mapped 1:1 onto Linux irq numbers. Cascaded irq controllers are not - * supported. - */ -unsigned int irq_create_of_mapping(struct device_node *controller, - const u32 *intspec, unsigned int intsize) -{ - return intspec[0]; -} -EXPORT_SYMBOL_GPL(irq_create_of_mapping); - void __init early_init_devtree(void *params) { /* Setup flat device-tree pointer */ diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 25a498eb98a..af48e59bc2f 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -411,6 +411,18 @@ unsigned int irq_create_of_mapping(struct device_node *controller, domain = controller ? irq_find_host(controller) : irq_default_domain; if (!domain) { +#ifdef CONFIG_MIPS + /* + * Workaround to avoid breaking interrupt controller drivers + * that don't yet register an irq_domain. This is temporary + * code. ~~~gcl, Feb 24, 2012 + * + * Scheduled for removal in Linux v3.6. That should be enough + * time. + */ + if (intsize > 0) + return intspec[0]; +#endif printk(KERN_WARNING "irq: no irq domain found for %s !\n", controller->full_name); return 0; |