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| author | Darren Stevens <darren@stevens-zone.net> | 2018-08-19 21:21:47 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-12-20 22:21:20 +1100 |
| commit | 0428a5f494a003c98c1d1fc98aae605c288dc066 (patch) | |
| tree | c505e0957a78441bb8a41c99dcb7488376dd9d01 /arch/powerpc/platforms | |
| parent | 68f211a4d1e5882e881bbb84b6505908dde5f625 (diff) | |
| download | talos-obmc-linux-0428a5f494a003c98c1d1fc98aae605c288dc066.tar.gz talos-obmc-linux-0428a5f494a003c98c1d1fc98aae605c288dc066.zip | |
powerpc/pasemi: Add Nemo board IRQ initroutine
Add a IRQ init routine for the Nemo board which inits and attatches
the i8259 found in the SB600, and a cascade routine to dispatch the
interrupts.
Signed-off-by: Darren Stevens <darren@stevens-zone.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/pasemi/setup.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c index 9a6eb04cca83..fd33e94338b2 100644 --- a/arch/powerpc/platforms/pasemi/setup.c +++ b/arch/powerpc/platforms/pasemi/setup.c @@ -34,6 +34,7 @@ #include <asm/prom.h> #include <asm/iommu.h> #include <asm/machdep.h> +#include <asm/i8259.h> #include <asm/mpic.h> #include <asm/smp.h> #include <asm/time.h> @@ -183,6 +184,42 @@ static int __init pas_setup_mce_regs(void) } machine_device_initcall(pasemi, pas_setup_mce_regs); +#ifdef CONFIG_PPC_PASEMI_NEMO +static void sb600_8259_cascade(struct irq_desc *desc) +{ + struct irq_chip *chip = irq_desc_get_chip(desc); + unsigned int cascade_irq = i8259_irq(); + + if (cascade_irq) + generic_handle_irq(cascade_irq); + + chip->irq_eoi(&desc->irq_data); +} + +static void nemo_init_IRQ(struct mpic *mpic) +{ + struct device_node *np; + int gpio_virq; + /* Connect the SB600's legacy i8259 controller */ + np = of_find_node_by_path("/pxp@0,e0000000"); + i8259_init(np, 0); + of_node_put(np); + + gpio_virq = irq_create_mapping(NULL, 3); + irq_set_irq_type(gpio_virq, IRQ_TYPE_LEVEL_HIGH); + irq_set_chained_handler(gpio_virq, sb600_8259_cascade); + mpic_unmask_irq(irq_get_irq_data(gpio_virq)); + + irq_set_default_host(mpic->irqhost); +} + +#else + +static inline void nemo_init_IRQ(struct mpic *mpic) +{ +} +#endif + static __init void pas_init_IRQ(void) { struct device_node *np; |
