diff options
| author | Andrew Bresticker <abrestic@chromium.org> | 2014-09-18 23:47:26 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-11-24 07:44:56 +0100 |
| commit | 4a6a3ea392306b04fc687d4314efba562121cc9a (patch) | |
| tree | 108812971050e86179140b7754d335b54b134509 /drivers/irqchip/irq-mips-gic.c | |
| parent | irqchip: mips-gic: Probe for number of external interrupts (diff) | |
| download | linux-4a6a3ea392306b04fc687d4314efba562121cc9a.tar.xz linux-4a6a3ea392306b04fc687d4314efba562121cc9a.zip | |
irqchip: mips-gic: Use separate edge/level irq_chips
GIC edge-triggered interrupts must be acknowledged by clearing the edge
detector via a write to GIC_SH_WEDGE. Create a separate edge-triggered
irq_chip with the appropriate irq_ack() callback. This also allows us
to get rid of gic_irq_flags.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Reviewed-by: Qais Yousef <qais.yousef@imgtec.com>
Tested-by: Qais Yousef <qais.yousef@imgtec.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jeffrey Deans <jeffrey.deans@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Jonas Gorski <jogo@openwrt.org>
Cc: John Crispin <blogic@openwrt.org>
Cc: David Daney <ddaney.cavm@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7818/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'drivers/irqchip/irq-mips-gic.c')
| -rw-r--r-- | drivers/irqchip/irq-mips-gic.c | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c index 3cd91d34973d..64d7d571df62 100644 --- a/drivers/irqchip/irq-mips-gic.c +++ b/drivers/irqchip/irq-mips-gic.c @@ -24,7 +24,6 @@ unsigned int gic_frequency; unsigned int gic_present; unsigned long _gic_base; -unsigned int gic_irq_flags[GIC_NUM_INTRS]; unsigned int gic_cpu_pin; struct gic_pcpu_mask { @@ -45,6 +44,7 @@ static struct gic_intrmask_regs intrmask_regs[NR_CPUS]; static DEFINE_SPINLOCK(gic_lock); static struct irq_domain *gic_irq_domain; static int gic_shared_intrs; +static struct irq_chip gic_level_irq_controller, gic_edge_irq_controller; static void __gic_irq_dispatch(void); @@ -229,9 +229,7 @@ static void gic_ack_irq(struct irq_data *d) { unsigned int irq = d->hwirq; - /* Clear edge detector */ - if (gic_irq_flags[irq] & GIC_TRIG_EDGE) - GICWRITE(GIC_REG(SHARED, GIC_SH_WEDGE), irq); + GICWRITE(GIC_REG(SHARED, GIC_SH_WEDGE), irq); } static int gic_set_type(struct irq_data *d, unsigned int type) @@ -276,11 +274,13 @@ static int gic_set_type(struct irq_data *d, unsigned int type) } if (is_edge) { - gic_irq_flags[irq] |= GIC_TRIG_EDGE; - __irq_set_handler_locked(d->irq, handle_edge_irq); + __irq_set_chip_handler_name_locked(d->irq, + &gic_edge_irq_controller, + handle_edge_irq, NULL); } else { - gic_irq_flags[irq] &= ~GIC_TRIG_EDGE; - __irq_set_handler_locked(d->irq, handle_level_irq); + __irq_set_chip_handler_name_locked(d->irq, + &gic_level_irq_controller, + handle_level_irq, NULL); } spin_unlock_irqrestore(&gic_lock, flags); @@ -318,7 +318,17 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *cpumask, } #endif -static struct irq_chip gic_irq_controller = { +static struct irq_chip gic_level_irq_controller = { + .name = "MIPS GIC", + .irq_mask = gic_mask_irq, + .irq_unmask = gic_unmask_irq, + .irq_set_type = gic_set_type, +#ifdef CONFIG_SMP + .irq_set_affinity = gic_set_affinity, +#endif +}; + +static struct irq_chip gic_edge_irq_controller = { .name = "MIPS GIC", .irq_ack = gic_ack_irq, .irq_mask = gic_mask_irq, @@ -431,7 +441,6 @@ static void __init gic_basic_init(int numvpes) GIC_SET_POLARITY(i, GIC_POL_POS); GIC_SET_TRIGGER(i, GIC_TRIG_LEVEL); GIC_CLR_INTR_MASK(i); - gic_irq_flags[i] = 0; } vpe_local_setup(numvpes); @@ -442,7 +451,8 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq, { unsigned long flags; - irq_set_chip_and_handler(virq, &gic_irq_controller, handle_level_irq); + irq_set_chip_and_handler(virq, &gic_level_irq_controller, + handle_level_irq); spin_lock_irqsave(&gic_lock, flags); GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_MAP_TO_PIN(hw)), |