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irqchip/al-fic: Add support for irq retrigger 

Introduce interrupts retrigger support for Amazon's Annapurna Labs Fabric
Interrupt Controller.

Signed-off-by: Talel Shenhar <talel@amazon.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1568018358-18985-1-git-send-email-talel@amazon.com
This commit is contained in:
Talel Shenhar 2019-09-09 11:39:18 +03:00 committed by Marc Zyngier
parent c9c96e30ec
commit 9c426b770b
1 changed files with 12 additions and 0 deletions
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12
drivers/irqchip/irq-al-fic.c
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@ -15,6 +15,7 @@
/* FIC Registers */
#define AL_FIC_CAUSE 0x00
#define AL_FIC_SET_CAUSE 0x08
#define AL_FIC_MASK 0x10
#define AL_FIC_CONTROL 0x28
@ -126,6 +127,16 @@ static void al_fic_irq_handler(struct irq_desc *desc)
chained_irq_exit(irqchip, desc);
}
static int al_fic_irq_retrigger(struct irq_data *data)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data);
struct al_fic *fic = gc->private;
writel_relaxed(BIT(data->hwirq), fic->base + AL_FIC_SET_CAUSE);
return 1;
}
static int al_fic_register(struct device_node *node,
struct al_fic *fic)
{
@ -159,6 +170,7 @@ static int al_fic_register(struct device_node *node,
gc->chip_types->chip.irq_unmask = irq_gc_mask_clr_bit;
gc->chip_types->chip.irq_ack = irq_gc_ack_clr_bit;
gc->chip_types->chip.irq_set_type = al_fic_irq_set_type;
gc->chip_types->chip.irq_retrigger = al_fic_irq_retrigger;
gc->chip_types->chip.flags = IRQCHIP_SKIP_SET_WAKE;
gc->private = fic;