From mboxrd@z Thu Jan 1 00:00:00 1970 From: jiang.liu@linux.intel.com (Jiang Liu) Date: Fri, 26 Sep 2014 22:02:03 +0800 Subject: [RFT v2 02/24] genirq: Introduce helper functions to support stacked irq_chip In-Reply-To: <1411740145-30626-1-git-send-email-jiang.liu@linux.intel.com> References: <1411740145-30626-1-git-send-email-jiang.liu@linux.intel.com> Message-ID: <1411740145-30626-3-git-send-email-jiang.liu@linux.intel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Now we already support hierarchy irq_datas, so introduce several helpers to support stacked irq_chips. Signed-off-by: Jiang Liu --- include/linux/irq.h | 5 +++++ kernel/irq/chip.c | 17 +++++++++++++++++ 2 files changed, 22 insertions(+) diff --git a/include/linux/irq.h b/include/linux/irq.h index b1aa23eea711..07abf5a1cd8e 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -435,6 +435,11 @@ extern void handle_percpu_devid_irq(unsigned int irq, struct irq_desc *desc); extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc); extern void handle_nested_irq(unsigned int irq); +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY +extern void irq_chip_ack_parent(struct irq_data *data); +extern int irq_chip_retrigger_hierarchy(struct irq_data *data); +#endif + /* Handling of unhandled and spurious interrupts: */ extern void note_interrupt(unsigned int irq, struct irq_desc *desc, irqreturn_t action_ret); diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 46bd5e2190c3..58ed9eda091e 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -821,3 +821,20 @@ void irq_cpu_offline(void) raw_spin_unlock_irqrestore(&desc->lock, flags); } } + +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY +void irq_chip_ack_parent(struct irq_data *data) +{ + data = data->parent_data; + data->chip->irq_ack(data); +} + +int irq_chip_retrigger_hierarchy(struct irq_data *data) +{ + for (data = data->parent_data; data; data = data->parent_data) + if (data->chip && data->chip->irq_retrigger) + return data->chip->irq_retrigger(data); + + return -ENOSYS; +} +#endif -- 1.7.10.4