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Subject[PATCH v4 2/4] irqchip: dw-apb-ictl: prepare for support hierarchy irq domain
Date
Rename some functions and variables in advance, to make the next patch
looks more clear. The details are as follows:
1. rename dw_apb_ictl_handler() to dw_apb_ictl_handle_irq_cascaded().
2. change (1 << hwirq) to BIT(hwirq).

In function dw_apb_ictl_init():
1. rename local variable irq to parent_irq.
2. add "const struct irq_domain_ops *domain_ops = &irq_generic_chip_ops",
then replace &irq_generic_chip_ops in other places with domain_ops.

No functional change.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Tested-by: Haoyu Lv <lvhaoyu@huawei.com>
---
drivers/irqchip/irq-dw-apb-ictl.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/irqchip/irq-dw-apb-ictl.c b/drivers/irqchip/irq-dw-apb-ictl.c
index e4550e9c810ba94..5458004242e9d20 100644
--- a/drivers/irqchip/irq-dw-apb-ictl.c
+++ b/drivers/irqchip/irq-dw-apb-ictl.c
@@ -26,7 +26,7 @@
#define APB_INT_FINALSTATUS_H 0x34
#define APB_INT_BASE_OFFSET 0x04

-static void dw_apb_ictl_handler(struct irq_desc *desc)
+static void dw_apb_ictl_handle_irq_cascaded(struct irq_desc *desc)
{
struct irq_domain *d = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -43,7 +43,7 @@ static void dw_apb_ictl_handler(struct irq_desc *desc)
u32 virq = irq_find_mapping(d, gc->irq_base + hwirq);

generic_handle_irq(virq);
- stat &= ~(1 << hwirq);
+ stat &= ~BIT(hwirq);
}
}

@@ -73,12 +73,13 @@ static int __init dw_apb_ictl_init(struct device_node *np,
struct irq_domain *domain;
struct irq_chip_generic *gc;
void __iomem *iobase;
- int ret, nrirqs, irq, i;
+ int ret, nrirqs, parent_irq, i;
u32 reg;
+ const struct irq_domain_ops *domain_ops = &irq_generic_chip_ops;

/* Map the parent interrupt for the chained handler */
- irq = irq_of_parse_and_map(np, 0);
- if (irq <= 0) {
+ parent_irq = irq_of_parse_and_map(np, 0);
+ if (parent_irq <= 0) {
pr_err("%pOF: unable to parse irq\n", np);
return -EINVAL;
}
@@ -120,8 +121,7 @@ static int __init dw_apb_ictl_init(struct device_node *np,
else
nrirqs = fls(readl_relaxed(iobase + APB_INT_ENABLE_L));

- domain = irq_domain_add_linear(np, nrirqs,
- &irq_generic_chip_ops, NULL);
+ domain = irq_domain_add_linear(np, nrirqs, domain_ops, NULL);
if (!domain) {
pr_err("%pOF: unable to add irq domain\n", np);
ret = -ENOMEM;
@@ -146,7 +146,8 @@ static int __init dw_apb_ictl_init(struct device_node *np,
gc->chip_types[0].chip.irq_resume = dw_apb_ictl_resume;
}

- irq_set_chained_handler_and_data(irq, dw_apb_ictl_handler, domain);
+ irq_set_chained_handler_and_data(parent_irq,
+ dw_apb_ictl_handle_irq_cascaded, domain);

return 0;

--
1.8.3

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