From 4dc70713dc24dceeea7f106828674744a6294860 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Thu, 24 Feb 2022 10:12:23 +0000 Subject: [PATCH] irqchip/qcom-pdc: Kill non-wakeup irqdomain A careful look at the way the PDC driver works shows that: - all interrupts are in the same space - all interrupts are treated the same And yet the driver creates two domains based on whether the interrupt gets mapped directly or from the pinctrl code, which is obviously a waste of resources. Kill the non-wakeup domain and unify all the interrupt handling. Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20220224101226.88373-3-maz@kernel.org --- drivers/irqchip/qcom-pdc.c | 84 ++++++---------------------------------------- 1 file changed, 10 insertions(+), 74 deletions(-) diff --git a/drivers/irqchip/qcom-pdc.c b/drivers/irqchip/qcom-pdc.c index 3b214c4..5be5314 100644 --- a/drivers/irqchip/qcom-pdc.c +++ b/drivers/irqchip/qcom-pdc.c @@ -21,7 +21,6 @@ #include #include -#define PDC_MAX_IRQS 168 #define PDC_MAX_GPIO_IRQS 256 #define CLEAR_INTR(reg, intr) (reg & ~(1 << intr)) @@ -228,51 +227,6 @@ static int qcom_pdc_alloc(struct irq_domain *domain, unsigned int virq, if (ret) return ret; - ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq, - &qcom_pdc_gic_chip, NULL); - if (ret) - return ret; - - region = get_pin_region(hwirq); - if (!region) - return irq_domain_disconnect_hierarchy(domain->parent, virq); - - if (type & IRQ_TYPE_EDGE_BOTH) - type = IRQ_TYPE_EDGE_RISING; - - if (type & IRQ_TYPE_LEVEL_MASK) - type = IRQ_TYPE_LEVEL_HIGH; - - parent_fwspec.fwnode = domain->parent->fwnode; - parent_fwspec.param_count = 3; - parent_fwspec.param[0] = 0; - parent_fwspec.param[1] = pin_to_hwirq(region, hwirq); - parent_fwspec.param[2] = type; - - return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, - &parent_fwspec); -} - -static const struct irq_domain_ops qcom_pdc_ops = { - .translate = qcom_pdc_translate, - .alloc = qcom_pdc_alloc, - .free = irq_domain_free_irqs_common, -}; - -static int qcom_pdc_gpio_alloc(struct irq_domain *domain, unsigned int virq, - unsigned int nr_irqs, void *data) -{ - struct irq_fwspec *fwspec = data; - struct irq_fwspec parent_fwspec; - struct pdc_pin_region *region; - irq_hw_number_t hwirq; - unsigned int type; - int ret; - - ret = qcom_pdc_translate(domain, fwspec, &hwirq, &type); - if (ret) - return ret; - if (hwirq == GPIO_NO_WAKE_IRQ) return irq_domain_disconnect_hierarchy(domain, virq); @@ -301,16 +255,9 @@ static int qcom_pdc_gpio_alloc(struct irq_domain *domain, unsigned int virq, &parent_fwspec); } -static int qcom_pdc_gpio_domain_select(struct irq_domain *d, - struct irq_fwspec *fwspec, - enum irq_domain_bus_token bus_token) -{ - return bus_token == DOMAIN_BUS_WAKEUP; -} - -static const struct irq_domain_ops qcom_pdc_gpio_ops = { - .select = qcom_pdc_gpio_domain_select, - .alloc = qcom_pdc_gpio_alloc, +static const struct irq_domain_ops qcom_pdc_ops = { + .translate = qcom_pdc_translate, + .alloc = qcom_pdc_alloc, .free = irq_domain_free_irqs_common, }; @@ -361,7 +308,7 @@ static int pdc_setup_pin_mapping(struct device_node *np) static int qcom_pdc_init(struct device_node *node, struct device_node *parent) { - struct irq_domain *parent_domain, *pdc_domain, *pdc_gpio_domain; + struct irq_domain *parent_domain, *pdc_domain; int ret; pdc_base = of_iomap(node, 0); @@ -383,32 +330,21 @@ static int qcom_pdc_init(struct device_node *node, struct device_node *parent) goto fail; } - pdc_domain = irq_domain_create_hierarchy(parent_domain, 0, PDC_MAX_IRQS, - of_fwnode_handle(node), - &qcom_pdc_ops, NULL); - if (!pdc_domain) { - pr_err("%pOF: GIC domain add failed\n", node); - ret = -ENOMEM; - goto fail; - } - - pdc_gpio_domain = irq_domain_create_hierarchy(parent_domain, + pdc_domain = irq_domain_create_hierarchy(parent_domain, IRQ_DOMAIN_FLAG_QCOM_PDC_WAKEUP, PDC_MAX_GPIO_IRQS, of_fwnode_handle(node), - &qcom_pdc_gpio_ops, NULL); - if (!pdc_gpio_domain) { - pr_err("%pOF: PDC domain add failed for GPIO domain\n", node); + &qcom_pdc_ops, NULL); + if (!pdc_domain) { + pr_err("%pOF: PDC domain add failed\n", node); ret = -ENOMEM; - goto remove; + goto fail; } - irq_domain_update_bus_token(pdc_gpio_domain, DOMAIN_BUS_WAKEUP); + irq_domain_update_bus_token(pdc_domain, DOMAIN_BUS_WAKEUP); return 0; -remove: - irq_domain_remove(pdc_domain); fail: kfree(pdc_region); iounmap(pdc_base); -- 2.7.4