diff options
Diffstat (limited to 'drivers/base/regmap/regmap-irq.c')
| -rw-r--r-- | drivers/base/regmap/regmap-irq.c | 97 |
1 files changed, 70 insertions, 27 deletions
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c index 0d233cc1c7fa..db5305b37c9d 100644 --- a/drivers/base/regmap/regmap-irq.c +++ b/drivers/base/regmap/regmap-irq.c @@ -15,6 +15,7 @@ #include <linux/regmap.h> #include <linux/irq.h> #include <linux/interrupt.h> +#include <linux/irqdomain.h> #include <linux/slab.h> #include "internal.h" @@ -26,6 +27,7 @@ struct regmap_irq_chip_data { struct regmap_irq_chip *chip; int irq_base; + struct irq_domain *domain; void *status_reg_buf; unsigned int *status_buf; @@ -37,7 +39,7 @@ static inline const struct regmap_irq *irq_to_regmap_irq(struct regmap_irq_chip_data *data, int irq) { - return &data->chip->irqs[irq - data->irq_base]; + return &data->chip->irqs[irq]; } static void regmap_irq_lock(struct irq_data *data) @@ -74,7 +76,7 @@ static void regmap_irq_enable(struct irq_data *data) { struct regmap_irq_chip_data *d = irq_data_get_irq_chip_data(data); struct regmap *map = d->map; - const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->irq); + const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->hwirq); d->mask_buf[irq_data->reg_offset / map->reg_stride] &= ~irq_data->mask; } @@ -83,7 +85,7 @@ static void regmap_irq_disable(struct irq_data *data) { struct regmap_irq_chip_data *d = irq_data_get_irq_chip_data(data); struct regmap *map = d->map; - const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->irq); + const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->hwirq); d->mask_buf[irq_data->reg_offset / map->reg_stride] |= irq_data->mask; } @@ -153,7 +155,7 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) for (i = 0; i < chip->num_irqs; i++) { if (data->status_buf[chip->irqs[i].reg_offset / map->reg_stride] & chip->irqs[i].mask) { - handle_nested_irq(data->irq_base + i); + handle_nested_irq(irq_find_mapping(data->domain, i)); handled = true; } } @@ -164,6 +166,31 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) return IRQ_NONE; } +static int regmap_irq_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + struct regmap_irq_chip_data *data = h->host_data; + + irq_set_chip_data(virq, data); + irq_set_chip_and_handler(virq, ®map_irq_chip, handle_edge_irq); + irq_set_nested_thread(virq, 1); + + /* ARM needs us to explicitly flag the IRQ as valid + * and will set them noprobe when we do so. */ +#ifdef CONFIG_ARM + set_irq_flags(virq, IRQF_VALID); +#else + irq_set_noprobe(virq); +#endif + + return 0; +} + +static struct irq_domain_ops regmap_domain_ops = { + .map = regmap_irq_map, + .xlate = irq_domain_xlate_twocell, +}; + /** * regmap_add_irq_chip(): Use standard regmap IRQ controller handling * @@ -184,7 +211,7 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags, struct regmap_irq_chip_data **data) { struct regmap_irq_chip_data *d; - int cur_irq, i; + int i; int ret = -ENOMEM; for (i = 0; i < chip->num_irqs; i++) { @@ -195,11 +222,13 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags, return -EINVAL; } - irq_base = irq_alloc_descs(irq_base, 0, chip->num_irqs, 0); - if (irq_base < 0) { - dev_warn(map->dev, "Failed to allocate IRQs: %d\n", - irq_base); - return irq_base; + if (irq_base) { + irq_base = irq_alloc_descs(irq_base, 0, chip->num_irqs, 0); + if (irq_base < 0) { + dev_warn(map->dev, "Failed to allocate IRQs: %d\n", + irq_base); + return irq_base; + } } d = kzalloc(sizeof(*d), GFP_KERNEL); @@ -249,33 +278,31 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags, } } - /* Register them with genirq */ - for (cur_irq = irq_base; - cur_irq < chip->num_irqs + irq_base; - cur_irq++) { - irq_set_chip_data(cur_irq, d); - irq_set_chip_and_handler(cur_irq, ®map_irq_chip, - handle_edge_irq); - irq_set_nested_thread(cur_irq, 1); - - /* ARM needs us to explicitly flag the IRQ as valid - * and will set them noprobe when we do so. */ -#ifdef CONFIG_ARM - set_irq_flags(cur_irq, IRQF_VALID); -#else - irq_set_noprobe(cur_irq); -#endif + if (irq_base) + d->domain = irq_domain_add_legacy(map->dev->of_node, + chip->num_irqs, irq_base, 0, + ®map_domain_ops, d); + else + d->domain = irq_domain_add_linear(map->dev->of_node, + chip->num_irqs, + ®map_domain_ops, d); + if (!d->domain) { + dev_err(map->dev, "Failed to create IRQ domain\n"); + ret = -ENOMEM; + goto err_alloc; } ret = request_threaded_irq(irq, NULL, regmap_irq_thread, irq_flags, chip->name, d); if (ret != 0) { dev_err(map->dev, "Failed to request IRQ %d: %d\n", irq, ret); - goto err_alloc; + goto err_domain; } return 0; +err_domain: + /* Should really dispose of the domain but... */ err_alloc: kfree(d->mask_buf_def); kfree(d->mask_buf); @@ -298,6 +325,7 @@ void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *d) return; free_irq(irq, d); + /* We should unmap the domain but... */ kfree(d->mask_buf_def); kfree(d->mask_buf); kfree(d->status_reg_buf); @@ -315,6 +343,21 @@ EXPORT_SYMBOL_GPL(regmap_del_irq_chip); */ int regmap_irq_chip_get_base(struct regmap_irq_chip_data *data) { + WARN_ON(!data->irq_base); return data->irq_base; } EXPORT_SYMBOL_GPL(regmap_irq_chip_get_base); + +/** + * regmap_irq_get_virq(): Map an interrupt on a chip to a virtual IRQ + * + * Useful for drivers to request their own IRQs. + * + * @data: regmap_irq controller to operate on. + * @irq: index of the interrupt requested in the chip IRQs + */ +int regmap_irq_get_virq(struct regmap_irq_chip_data *data, int irq) +{ + return irq_create_mapping(data->domain, irq); +} +EXPORT_SYMBOL_GPL(regmap_irq_get_virq); |