diff options
| author | Ludovic Desroches <ludovic.desroches@atmel.com> | 2012-06-20 18:13:30 +0400 |
|---|---|---|
| committer | Nicolas Ferre <nicolas.ferre@atmel.com> | 2012-07-02 16:26:58 +0400 |
| commit | f8a073ee378b9893aee0749c3868a6ecfb0c1636 (patch) | |
| tree | 7d51d97410bb03bc6ca8b431b3df8592b206b7f7 /arch/arm/mach-at91 | |
| parent | c65739437045c351a2a0ddb834719b9d616d4d47 (diff) | |
| download | linux-f8a073ee378b9893aee0749c3868a6ecfb0c1636.tar.xz | |
ARM: at91: add of irq priorities support
Add a third cell to define irq priority.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Reviewed-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Diffstat (limited to 'arch/arm/mach-at91')
| -rw-r--r-- | arch/arm/mach-at91/include/mach/at91_aic.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-at91/irq.c | 34 |
2 files changed, 34 insertions, 3 deletions
diff --git a/arch/arm/mach-at91/include/mach/at91_aic.h b/arch/arm/mach-at91/include/mach/at91_aic.h index c1413ed1172d..3af7272a4060 100644 --- a/arch/arm/mach-at91/include/mach/at91_aic.h +++ b/arch/arm/mach-at91/include/mach/at91_aic.h @@ -28,6 +28,9 @@ extern void __iomem *at91_aic_base; .extern at91_aic_base #endif +#define AT91_AIC_IRQ_MIN_PRIORITY 0 +#define AT91_AIC_IRQ_MAX_PRIORITY 7 + #define AT91_AIC_SMR(n) ((n) * 4) /* Source Mode Registers 0-31 */ #define AT91_AIC_PRIOR (7 << 0) /* Priority Level */ #define AT91_AIC_SRCTYPE (3 << 5) /* Interrupt Source Type */ diff --git a/arch/arm/mach-at91/irq.c b/arch/arm/mach-at91/irq.c index df8605fd7bad..db8e14112eda 100644 --- a/arch/arm/mach-at91/irq.c +++ b/arch/arm/mach-at91/irq.c @@ -30,6 +30,7 @@ #include <linux/of_irq.h> #include <linux/irqdomain.h> #include <linux/err.h> +#include <linux/slab.h> #include <mach/hardware.h> #include <asm/irq.h> @@ -42,6 +43,7 @@ void __iomem *at91_aic_base; static struct irq_domain *at91_aic_domain; static struct device_node *at91_aic_np; +static unsigned int *at91_aic_irq_priorities; static void at91_aic_mask_irq(struct irq_data *d) { @@ -177,8 +179,9 @@ static int at91_aic_irq_map(struct irq_domain *h, unsigned int virq, /* Put virq number in Source Vector Register */ at91_aic_write(AT91_AIC_SVR(hw), virq); - /* Active Low interrupt, without priority */ - at91_aic_write(AT91_AIC_SMR(hw), AT91_AIC_SRCTYPE_LOW); + /* Active Low interrupt, with priority */ + at91_aic_write(AT91_AIC_SMR(hw), + AT91_AIC_SRCTYPE_LOW | at91_aic_irq_priorities[hw]); irq_set_chip_and_handler(virq, &at91_aic_chip, handle_fasteoi_irq); set_irq_flags(virq, IRQF_VALID | IRQF_PROBE); @@ -186,9 +189,28 @@ static int at91_aic_irq_map(struct irq_domain *h, unsigned int virq, return 0; } +static int at91_aic_irq_domain_xlate(struct irq_domain *d, struct device_node *ctrlr, + const u32 *intspec, unsigned int intsize, + irq_hw_number_t *out_hwirq, unsigned int *out_type) +{ + if (WARN_ON(intsize < 3)) + return -EINVAL; + if (WARN_ON(intspec[0] >= NR_AIC_IRQS)) + return -EINVAL; + if (WARN_ON((intspec[2] < AT91_AIC_IRQ_MIN_PRIORITY) + || (intspec[2] > AT91_AIC_IRQ_MAX_PRIORITY))) + return -EINVAL; + + *out_hwirq = intspec[0]; + *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK; + at91_aic_irq_priorities[*out_hwirq] = intspec[2]; + + return 0; +} + static struct irq_domain_ops at91_aic_irq_ops = { .map = at91_aic_irq_map, - .xlate = irq_domain_xlate_twocell, + .xlate = at91_aic_irq_domain_xlate, }; int __init at91_aic_of_init(struct device_node *node, @@ -198,6 +220,12 @@ int __init at91_aic_of_init(struct device_node *node, const __be32 *p; u32 val; + at91_aic_irq_priorities = kzalloc(NR_AIC_IRQS + * sizeof(*at91_aic_irq_priorities), + GFP_KERNEL); + if (!at91_aic_irq_priorities) + return -ENOMEM; + at91_aic_base = of_iomap(node, 0); at91_aic_np = node; |