diff options
| author | Marek Behún <kabel@kernel.org> | 2024-08-07 18:41:03 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-08-08 17:15:01 +0200 |
| commit | d6ca3f440239fb4fa85228ead4c5e8b286645b7e (patch) | |
| tree | 3400e6d63b23f18fdb07d531ad5c81a9b679b4ab /drivers | |
| parent | irqchip/armada-370-xp: Iterate only valid bits of the per-CPU interrupt cause... (diff) | |
| download | linux-d6ca3f440239fb4fa85228ead4c5e8b286645b7e.tar.xz linux-d6ca3f440239fb4fa85228ead4c5e8b286645b7e.zip | |
irqchip/armada-370-xp: Allow mapping only per-CPU interrupts
On platforms where MPIC is not the top-level interrupt controller the
driver currently only supports handling of the per-CPU interrupts (the
first 29 interrupts). This is obvious from the code of
mpic_handle_cascade_irq(), which reads only one cause register.
Bound the number of available interrupts in the interrupt domain to 29 for
these platforms.
The corresponding device-trees refer only to per-CPU interrupts via MPIC,
the other interrupts are referred to via GIC.
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/irqchip/irq-armada-370-xp.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c index 36d1bac8a99f..4f3f99af12b2 100644 --- a/drivers/irqchip/irq-armada-370-xp.c +++ b/drivers/irqchip/irq-armada-370-xp.c @@ -848,6 +848,19 @@ static int __init mpic_of_init(struct device_node *node, struct device_node *par for (irq_hw_number_t i = 0; i < nr_irqs; i++) writel(i, mpic->base + MPIC_INT_CLEAR_ENABLE); + /* + * Initialize mpic->parent_irq before calling any other functions, since + * it is used to distinguish between IPI and non-IPI platforms. + */ + mpic->parent_irq = irq_of_parse_and_map(node, 0); + + /* + * On non-IPI platforms the driver currently supports only the per-CPU + * interrupts (the first 29 interrupts). See mpic_handle_cascade_irq(). + */ + if (!mpic_is_ipi_available(mpic)) + nr_irqs = MPIC_PER_CPU_IRQS_NR; + mpic->domain = irq_domain_add_linear(node, nr_irqs, &mpic_irq_ops, mpic); if (!mpic->domain) { pr_err("%pOF: Unable to add IRQ domain\n", node); @@ -856,12 +869,6 @@ static int __init mpic_of_init(struct device_node *node, struct device_node *par irq_domain_update_bus_token(mpic->domain, DOMAIN_BUS_WIRED); - /* - * Initialize mpic->parent_irq before calling any other functions, since - * it is used to distinguish between IPI and non-IPI platforms. - */ - mpic->parent_irq = irq_of_parse_and_map(node, 0); - /* Setup for the boot CPU */ mpic_perf_init(mpic); mpic_smp_cpu_init(mpic); |