diff options
| author |   Marc Zyngier <maz@kernel.org> | 2022-02-24 10:12:22 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-03-01 10:06:24 +0000 |
| commit | 8d4c998919320206f8832dc413e23fdd27ef2274 (patch) | |
| tree | fb5f85c590497034ac2a648669188a26f5eae35a /drivers/irqchip/qcom-pdc.c | |
| parent | Linux 5.17-rc3 (diff) | |
| download | linux-dev-8d4c998919320206f8832dc413e23fdd27ef2274.tar.xz linux-dev-8d4c998919320206f8832dc413e23fdd27ef2274.zip | |
irqchip/qcom-pdc: Kill PDC_NO_PARENT_IRQ
PDC_NO_PARENT_IRQ is pretty pointless, as all it indicates is
that the PDC terminates the interrupt hierarchy. Which is
exactly the same as not having a mapping in the GIC space.
This is also bad practice to treat the absence of a hwirq
as a hwirq itself.
Just explicitly use the region mapping pointer, and drop
the definition.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Maulik Shah <quic_mkshah@quicinc.com>
Link: https://lore.kernel.org/r/20220224101226.88373-2-maz@kernel.org
Diffstat (limited to 'drivers/irqchip/qcom-pdc.c')
| -rw-r--r-- | drivers/irqchip/qcom-pdc.c | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/drivers/irqchip/qcom-pdc.c b/drivers/irqchip/qcom-pdc.c index 173e6520e06e..3b214c4e6755 100644 --- a/drivers/irqchip/qcom-pdc.c +++ b/drivers/irqchip/qcom-pdc.c @@ -30,14 +30,14 @@ #define IRQ_ENABLE_BANK 0x10 #define IRQ_i_CFG 0x110 -#define PDC_NO_PARENT_IRQ ~0UL - struct pdc_pin_region { u32 pin_base; u32 parent_base; u32 cnt; }; +#define pin_to_hwirq(r, p) ((r)->parent_base + (p) - (r)->pin_base) + static DEFINE_RAW_SPINLOCK(pdc_lock); static void __iomem *pdc_base; static struct pdc_pin_region *pdc_region; @@ -186,19 +186,17 @@ static struct irq_chip qcom_pdc_gic_chip = { .irq_set_affinity = irq_chip_set_affinity_parent, }; -static irq_hw_number_t get_parent_hwirq(int pin) +static struct pdc_pin_region *get_pin_region(int pin) { int i; - struct pdc_pin_region *region; for (i = 0; i < pdc_region_cnt; i++) { - region = &pdc_region[i]; - if (pin >= region->pin_base && - pin < region->pin_base + region->cnt) - return (region->parent_base + pin - region->pin_base); + if (pin >= pdc_region[i].pin_base && + pin < pdc_region[i].pin_base + pdc_region[i].cnt) + return &pdc_region[i]; } - return PDC_NO_PARENT_IRQ; + return NULL; } static int qcom_pdc_translate(struct irq_domain *d, struct irq_fwspec *fwspec, @@ -221,7 +219,8 @@ static int qcom_pdc_alloc(struct irq_domain *domain, unsigned int virq, { struct irq_fwspec *fwspec = data; struct irq_fwspec parent_fwspec; - irq_hw_number_t hwirq, parent_hwirq; + struct pdc_pin_region *region; + irq_hw_number_t hwirq; unsigned int type; int ret; @@ -234,8 +233,8 @@ static int qcom_pdc_alloc(struct irq_domain *domain, unsigned int virq, if (ret) return ret; - parent_hwirq = get_parent_hwirq(hwirq); - if (parent_hwirq == PDC_NO_PARENT_IRQ) + region = get_pin_region(hwirq); + if (!region) return irq_domain_disconnect_hierarchy(domain->parent, virq); if (type & IRQ_TYPE_EDGE_BOTH) @@ -247,7 +246,7 @@ static int qcom_pdc_alloc(struct irq_domain *domain, unsigned int virq, parent_fwspec.fwnode = domain->parent->fwnode; parent_fwspec.param_count = 3; parent_fwspec.param[0] = 0; - parent_fwspec.param[1] = parent_hwirq; + parent_fwspec.param[1] = pin_to_hwirq(region, hwirq); parent_fwspec.param[2] = type; return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, @@ -265,7 +264,8 @@ static int qcom_pdc_gpio_alloc(struct irq_domain *domain, unsigned int virq, { struct irq_fwspec *fwspec = data; struct irq_fwspec parent_fwspec; - irq_hw_number_t hwirq, parent_hwirq; + struct pdc_pin_region *region; + irq_hw_number_t hwirq; unsigned int type; int ret; @@ -281,8 +281,8 @@ static int qcom_pdc_gpio_alloc(struct irq_domain *domain, unsigned int virq, if (ret) return ret; - parent_hwirq = get_parent_hwirq(hwirq); - if (parent_hwirq == PDC_NO_PARENT_IRQ) + region = get_pin_region(hwirq); + if (!region) return irq_domain_disconnect_hierarchy(domain->parent, virq); if (type & IRQ_TYPE_EDGE_BOTH) @@ -294,7 +294,7 @@ static int qcom_pdc_gpio_alloc(struct irq_domain *domain, unsigned int virq, parent_fwspec.fwnode = domain->parent->fwnode; parent_fwspec.param_count = 3; parent_fwspec.param[0] = 0; - parent_fwspec.param[1] = parent_hwirq; + parent_fwspec.param[1] = pin_to_hwirq(region, hwirq); parent_fwspec.param[2] = type; return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, |