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irqchip/ls-extirq: Convert to a platform driver to make it work again

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Starting with the blamed commit, the ls-extirq driver stopped working. This
is because ls-extirq, being one of the interrupt-map property abusers, does
not pass the DT checks added by the referenced commit, making it unable to
determine its interrupt parent:

  irq-ls-extirq: Cannot find parent domain
  OF: of_irq_init: Failed to init /soc/syscon@1f70000/interrupt-controller@14
      		   ((____ptrval____)), parent 0000000000000000

Instead of reverting the referenced commit, convert the ls-extirq to a
platform driver to avoid the irqchip_init() -> of_irq_init() code path
completely.

As part of the conversion, use the managed resources APIs and
dev_err_probe() so that there is no need for a .remove() callback or for
complicated error handling.

Fixes: 1b1f04d827 ("of/irq: Ignore interrupt parent for nodes without interrupts")
Co-developed-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260122134034.3274053-2-ioana.ciornei@nxp.com
This commit is contained in:
Ioana Ciornei 2026-01-22 15:40:33 +02:00 committed by Thomas Gleixner
parent 63804fed14
commit 05cd654829
1 changed files with 36 additions and 39 deletions
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75
drivers/irqchip/irq-ls-extirq.c
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@ -168,40 +168,34 @@ ls_extirq_parse_map(struct ls_extirq_data *priv, struct device_node *node)
return 0; return 0;
} }
static int __init static int ls_extirq_probe(struct platform_device *pdev)
ls_extirq_of_init(struct device_node *node, struct device_node *parent)
{ {
struct irq_domain *domain, *parent_domain; struct irq_domain *domain, *parent_domain;
struct device_node *node, *parent;
struct device *dev = &pdev->dev;
struct ls_extirq_data *priv; struct ls_extirq_data *priv;
int ret; int ret;
node = dev->of_node;
parent = of_irq_find_parent(node);
if (!parent)
return dev_err_probe(dev, -ENODEV, "Failed to get IRQ parent node\n");
parent_domain = irq_find_host(parent); parent_domain = irq_find_host(parent);
if (!parent_domain) { if (!parent_domain)
pr_err("Cannot find parent domain\n"); return dev_err_probe(dev, -EPROBE_DEFER, "Cannot find parent domain\n");
ret = -ENODEV;
goto err_irq_find_host;
}
priv = kzalloc(sizeof(*priv), GFP_KERNEL); priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv) { if (!priv)
ret = -ENOMEM; return dev_err_probe(dev, -ENOMEM, "Failed to allocate memory\n");
goto err_alloc_priv;
}
/* priv->intpcr = devm_of_iomap(dev, node, 0, NULL);
* All extirq OF nodes are under a scfg/syscon node with if (!priv->intpcr)
* the 'ranges' property return dev_err_probe(dev, -ENOMEM, "Cannot ioremap OF node %pOF\n", node);
*/
priv->intpcr = of_iomap(node, 0);
if (!priv->intpcr) {
pr_err("Cannot ioremap OF node %pOF\n", node);
ret = -ENOMEM;
goto err_iomap;
}
ret = ls_extirq_parse_map(priv, node); ret = ls_extirq_parse_map(priv, node);
if (ret) if (ret)
goto err_parse_map; return dev_err_probe(dev, ret, "Failed to parse IRQ map\n");
priv->big_endian = of_device_is_big_endian(node->parent); priv->big_endian = of_device_is_big_endian(node->parent);
priv->is_ls1021a_or_ls1043a = of_device_is_compatible(node, "fsl,ls1021a-extirq") || priv->is_ls1021a_or_ls1043a = of_device_is_compatible(node, "fsl,ls1021a-extirq") ||
@ -210,23 +204,26 @@ ls_extirq_of_init(struct device_node *node, struct device_node *parent)
domain = irq_domain_create_hierarchy(parent_domain, 0, priv->nirq, of_fwnode_handle(node), domain = irq_domain_create_hierarchy(parent_domain, 0, priv->nirq, of_fwnode_handle(node),
&extirq_domain_ops, priv); &extirq_domain_ops, priv);
if (!domain) { if (!domain)
ret = -ENOMEM; return dev_err_probe(dev, -ENOMEM, "Failed to add IRQ domain\n");
goto err_add_hierarchy;
}
return 0; return 0;
err_add_hierarchy:
err_parse_map:
iounmap(priv->intpcr);
err_iomap:
kfree(priv);
err_alloc_priv:
err_irq_find_host:
return ret;
} }
IRQCHIP_DECLARE(ls1021a_extirq, "fsl,ls1021a-extirq", ls_extirq_of_init); static const struct of_device_id ls_extirq_dt_ids[] = {
IRQCHIP_DECLARE(ls1043a_extirq, "fsl,ls1043a-extirq", ls_extirq_of_init); { .compatible = "fsl,ls1021a-extirq" },
IRQCHIP_DECLARE(ls1088a_extirq, "fsl,ls1088a-extirq", ls_extirq_of_init); { .compatible = "fsl,ls1043a-extirq" },
{ .compatible = "fsl,ls1088a-extirq" },
{}
};
MODULE_DEVICE_TABLE(of, ls_extirq_dt_ids);
static struct platform_driver ls_extirq_driver = {
.probe = ls_extirq_probe,
.driver = {
.name = "ls-extirq",
.of_match_table = ls_extirq_dt_ids,
}
};
builtin_platform_driver(ls_extirq_driver);