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irqchip/lpc32xx: Switch to dynamic chip name output

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Instead of overriding the name field with the device name, use
the relevant callback. This allows us to make the irq_chip structure
const.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220209162607.1118325-5-maz@kernel.org
This commit is contained in:
Marc Zyngier 2022-02-09 16:26:01 +00:00
parent 745f1fb91f
commit 365550239f
1 changed files with 22 additions and 12 deletions
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34
drivers/irqchip/irq-lpc32xx.c
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@ -11,6 +11,7 @@
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <asm/exception.h>
@ -25,8 +26,8 @@
struct lpc32xx_irq_chip {
void __iomem *base;
phys_addr_t addr;
struct irq_domain *domain;
struct irq_chip chip;
};
static struct lpc32xx_irq_chip *lpc32xx_mic_irqc;
@ -118,6 +119,24 @@ static int lpc32xx_irq_set_type(struct irq_data *d, unsigned int type)
return 0;
}
static void lpc32xx_irq_print_chip(struct irq_data *d, struct seq_file *p)
{
struct lpc32xx_irq_chip *ic = irq_data_get_irq_chip_data(d);
if (ic == lpc32xx_mic_irqc)
seq_printf(p, "%08x.mic", ic->addr);
else
seq_printf(p, "%08x.sic", ic->addr);
}
static const struct irq_chip lpc32xx_chip = {
.irq_ack = lpc32xx_irq_ack,
.irq_mask = lpc32xx_irq_mask,
.irq_unmask = lpc32xx_irq_unmask,
.irq_set_type = lpc32xx_irq_set_type,
.irq_print_chip = lpc32xx_irq_print_chip,
};
static void __exception_irq_entry lpc32xx_handle_irq(struct pt_regs *regs)
{
struct lpc32xx_irq_chip *ic = lpc32xx_mic_irqc;
@ -153,7 +172,7 @@ static int lpc32xx_irq_domain_map(struct irq_domain *id, unsigned int virq,
struct lpc32xx_irq_chip *ic = id->host_data;
irq_set_chip_data(virq, ic);
irq_set_chip_and_handler(virq, &ic->chip, handle_level_irq);
irq_set_chip_and_handler(virq, &lpc32xx_chip, handle_level_irq);
irq_set_status_flags(virq, IRQ_LEVEL);
irq_set_noprobe(virq);
@ -183,6 +202,7 @@ static int __init lpc32xx_of_ic_init(struct device_node *node,
if (!irqc)
return -ENOMEM;
irqc->addr = addr;
irqc->base = of_iomap(node, 0);
if (!irqc->base) {
pr_err("%pOF: unable to map registers\n", node);
@ -190,21 +210,11 @@ static int __init lpc32xx_of_ic_init(struct device_node *node,
return -EINVAL;
}
irqc->chip.irq_ack = lpc32xx_irq_ack;
irqc->chip.irq_mask = lpc32xx_irq_mask;
irqc->chip.irq_unmask = lpc32xx_irq_unmask;
irqc->chip.irq_set_type = lpc32xx_irq_set_type;
if (is_mic)
irqc->chip.name = kasprintf(GFP_KERNEL, "%08x.mic", addr);
else
irqc->chip.name = kasprintf(GFP_KERNEL, "%08x.sic", addr);
irqc->domain = irq_domain_add_linear(node, NR_LPC32XX_IC_IRQS,
&lpc32xx_irq_domain_ops, irqc);
if (!irqc->domain) {
pr_err("unable to add irq domain\n");
iounmap(irqc->base);
kfree(irqc->chip.name);
kfree(irqc);
return -ENODEV;
}