diff options
| -rw-r--r-- | drivers/mfd/twl6030-irq.c | 119 |
1 files changed, 69 insertions, 50 deletions
diff --git a/drivers/mfd/twl6030-irq.c b/drivers/mfd/twl6030-irq.c index f7da261..1b03ce9 100644 --- a/drivers/mfd/twl6030-irq.c +++ b/drivers/mfd/twl6030-irq.c @@ -86,11 +86,11 @@ static int twl6030_interrupt_mapping[24] = { }; /*----------------------------------------------------------------------*/ -static unsigned twl6030_irq_base; static int twl_irq; static bool twl_irq_wake_enabled; static atomic_t twl6030_wakeirqs = ATOMIC_INIT(0); +struct irq_domain *irq_domain; static int twl6030_irq_pm_notifier(struct notifier_block *notifier, unsigned long pm_event, void *unused) @@ -138,6 +138,7 @@ static struct notifier_block twl6030_irq_pm_notifier_block = { static irqreturn_t twl6030_irq_thread(int irq, void *data) { int i, ret; + struct irq_domain *irq_domain = (struct irq_domain *)data; union { u8 bytes[4]; u32 int_sts; @@ -161,9 +162,14 @@ static irqreturn_t twl6030_irq_thread(int irq, void *data) for (i = 0; sts.int_sts; sts.int_sts >>= 1, i++) if (sts.int_sts & 0x1) { - int module_irq = twl6030_irq_base + - twl6030_interrupt_mapping[i]; - handle_nested_irq(module_irq); + int module_irq = + irq_find_mapping(irq_domain, + twl6030_interrupt_mapping[i]); + if (module_irq) + handle_nested_irq(module_irq); + else + pr_err("twl6030_irq: Unmapped PIH ISR %u detected\n", + i); pr_debug("twl6030_irq: PIH ISR %u, virq%u\n", i, module_irq); } @@ -186,19 +192,6 @@ static irqreturn_t twl6030_irq_thread(int irq, void *data) /*----------------------------------------------------------------------*/ -static inline void activate_irq(int irq) -{ -#ifdef CONFIG_ARM - /* ARM requires an extra step to clear IRQ_NOREQUEST, which it - * sets on behalf of every irq_chip. Also sets IRQ_NOPROBE. - */ - set_irq_flags(irq, IRQF_VALID); -#else - /* same effect on other architectures */ - irq_set_noprobe(irq); -#endif -} - static int twl6030_irq_set_wake(struct irq_data *d, unsigned int on) { if (on) @@ -279,7 +272,7 @@ int twl6030_mmc_card_detect_config(void) return ret; } - return twl6030_irq_base + MMCDETECT_INTR_OFFSET; + return irq_find_mapping(irq_domain, MMCDETECT_INTR_OFFSET); } EXPORT_SYMBOL(twl6030_mmc_card_detect_config); @@ -308,28 +301,54 @@ int twl6030_mmc_card_detect(struct device *dev, int slot) } EXPORT_SYMBOL(twl6030_mmc_card_detect); +static struct irq_chip twl6030_irq_chip; + +static int twl6030_irq_map(struct irq_domain *d, unsigned int virq, + irq_hw_number_t hwirq) +{ + irq_set_chip_data(virq, &twl6030_irq_chip); + irq_set_chip_and_handler(virq, &twl6030_irq_chip, handle_simple_irq); + irq_set_nested_thread(virq, true); + irq_set_parent(virq, twl_irq); + +#ifdef CONFIG_ARM + /* + * ARM requires an extra step to clear IRQ_NOREQUEST, which it + * sets on behalf of every irq_chip. Also sets IRQ_NOPROBE. + */ + set_irq_flags(virq, IRQF_VALID); +#else + /* same effect on other architectures */ + irq_set_noprobe(virq); +#endif + + return 0; +} + +static void twl6030_irq_unmap(struct irq_domain *d, unsigned int virq) +{ +#ifdef CONFIG_ARM + set_irq_flags(virq, 0); +#endif + irq_set_chip_and_handler(virq, NULL, NULL); + irq_set_chip_data(virq, NULL); +} + +static struct irq_domain_ops twl6030_irq_domain_ops = { + .map = twl6030_irq_map, + .unmap = twl6030_irq_unmap, + .xlate = irq_domain_xlate_onetwocell, +}; + int twl6030_init_irq(struct device *dev, int irq_num) { struct device_node *node = dev->of_node; - int nr_irqs, irq_base, irq_end; - static struct irq_chip twl6030_irq_chip; + int nr_irqs; int status; - int i; u8 mask[3]; nr_irqs = TWL6030_NR_IRQS; - irq_base = irq_alloc_descs(-1, 0, nr_irqs, 0); - if (IS_ERR_VALUE(irq_base)) { - dev_err(dev, "Fail to allocate IRQ descs\n"); - return irq_base; - } - - irq_domain_add_legacy(node, nr_irqs, irq_base, 0, - &irq_domain_simple_ops, NULL); - - irq_end = irq_base + nr_irqs; - mask[0] = 0xFF; mask[1] = 0xFF; mask[2] = 0xFF; @@ -346,8 +365,6 @@ int twl6030_init_irq(struct device *dev, int irq_num) return status; } - twl6030_irq_base = irq_base; - /* * install an irq handler for each of the modules; * clone dummy irq_chip since PIH can't *do* anything @@ -357,21 +374,18 @@ int twl6030_init_irq(struct device *dev, int irq_num) twl6030_irq_chip.irq_set_type = NULL; twl6030_irq_chip.irq_set_wake = twl6030_irq_set_wake; - for (i = irq_base; i < irq_end; i++) { - irq_set_chip_and_handler(i, &twl6030_irq_chip, - handle_simple_irq); - irq_set_chip_data(i, (void *)irq_num); - irq_set_nested_thread(i, true); - irq_set_parent(i, irq_num); - activate_irq(i); + irq_domain = irq_domain_add_linear(node, nr_irqs, + &twl6030_irq_domain_ops, NULL); + if (!irq_domain) { + dev_err(dev, "Can't add irq_domain\n"); + return -ENOMEM; } - dev_info(dev, "PIH (irq %d) nested IRQs %d..%d\n", - irq_num, irq_base, irq_end); + dev_info(dev, "PIH (irq %d) nested IRQs\n", irq_num); /* install an irq handler to demultiplex the TWL6030 interrupt */ status = request_threaded_irq(irq_num, NULL, twl6030_irq_thread, - IRQF_ONESHOT, "TWL6030-PIH", NULL); + IRQF_ONESHOT, "TWL6030-PIH", irq_domain); if (status < 0) { dev_err(dev, "could not claim irq %d: %d\n", irq_num, status); goto fail_irq; @@ -379,23 +393,28 @@ int twl6030_init_irq(struct device *dev, int irq_num) twl_irq = irq_num; register_pm_notifier(&twl6030_irq_pm_notifier_block); - return irq_base; + return 0; fail_irq: - for (i = irq_base; i < irq_end; i++) - irq_set_chip_and_handler(i, NULL, NULL); - + irq_domain_remove(irq_domain); return status; } int twl6030_exit_irq(void) { - if (twl_irq) { unregister_pm_notifier(&twl6030_irq_pm_notifier_block); free_irq(twl_irq, NULL); + /* + * TODO: IRQ domain and allocated nested IRQ descriptors + * should be freed somehow here. Now It can't be done, because + * child devices will not be deleted during removing of + * TWL Core driver and they will still contain allocated + * virt IRQs in their Resources tables. + * The same prevents us from using devm_request_threaded_irq() + * in this module. + */ } - return 0; } |
