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irqchip/irq-realtek-rtl: Activate multiple parents

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Until now the driver exactly registers a single parent interrupt.
Relax this to make use of all defined interrupts in the device tree.

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260605211646.2101652-8-markus.stockhausen@gmx.de
This commit is contained in:
Markus Stockhausen 2026-06-05 23:16:46 +02:00 committed by Thomas Gleixner
parent 291e30ea93
commit 4940e7daf4
1 changed files with 48 additions and 40 deletions
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88
drivers/irqchip/irq-realtek-rtl.c
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@ -175,64 +175,72 @@ static void realtek_irq_dispatch(struct irq_desc *desc)
static int __init realtek_setup_parents(struct device_node *node)
{
int err, parent_irq, num_parents = of_irq_count(node);
int p, cnt, err, parent_irq, num_parents = of_irq_count(node);
struct realtek_ictl_output *output;
struct irq_data *parent_data;
struct of_phandle_args oirq;
struct irq_domain *domain;
output = kcalloc(1, sizeof(*output), GFP_KERNEL);
cnt = max(1, num_parents);
output = kcalloc(cnt, sizeof(*output), GFP_KERNEL);
if (!output)
return -ENOMEM;
if (WARN_ON(!num_parents)) {
/*
* If DT contains no parent interrupts, assume MIPS IRQ 2 (HW0) is
* connected to the first output. This is the case for all known hardware.
*/
oirq.np = of_find_compatible_node(NULL, NULL,
"mti,cpu-interrupt-controller");
if (!oirq.np) {
for (p = 0; p < cnt; p++) {
if (WARN_ON(!num_parents)) {
/*
* If DT contains no parent interrupts, assume MIPS IRQ 2 (HW0) is
* connected to the first output. This is the case for all known hardware.
*/
oirq.np = of_find_compatible_node(NULL, NULL,
"mti,cpu-interrupt-controller");
if (!oirq.np) {
err = -EINVAL;
goto err_out;
}
oirq.args_count = 1;
oirq.args[0] = 2;
parent_irq = irq_create_of_mapping(&oirq);
of_node_put(oirq.np);
} else {
parent_irq = of_irq_get(node, p);
}
if (parent_irq <= 0) {
err = parent_irq ? parent_irq : -ENODEV;
goto err_out;
}
parent_data = irq_get_irq_data(parent_irq);
if (!parent_data) {
err = -EINVAL;
goto err_out;
}
oirq.args_count = 1;
oirq.args[0] = 2;
parent_irq = irq_create_of_mapping(&oirq);
of_node_put(oirq.np);
} else {
parent_irq = of_irq_get(node, 0);
}
domain = irq_domain_create_linear(of_fwnode_handle(node), RTL_ICTL_NUM_INPUTS,
&irq_domain_ops, &output[p]);
if (!domain) {
err = -ENOMEM;
goto err_out;
}
if (parent_irq <= 0) {
err = parent_irq ? parent_irq : -ENODEV;
goto err_out;
output[p].domain = domain;
output[p].fwnode = of_fwnode_handle(node);
output[p].index = p;
output[p].parent_irq = parent_irq;
output[p].parent_hwirq = irqd_to_hwirq(parent_data);
irq_set_chained_handler_and_data(parent_irq, realtek_irq_dispatch, &output[p]);
}
parent_data = irq_get_irq_data(parent_irq);
if (!parent_data) {
err = -EINVAL;
goto err_out;
}
domain = irq_domain_create_linear(of_fwnode_handle(node), RTL_ICTL_NUM_INPUTS,
&irq_domain_ops, output);
if (!domain) {
err = -ENOMEM;
goto err_out;
}
output->domain = domain;
output->fwnode = of_fwnode_handle(node);
output->index = 0;
output->parent_irq = parent_irq;
output->parent_hwirq = irqd_to_hwirq(parent_data);
irq_set_chained_handler_and_data(parent_irq, realtek_irq_dispatch, output);
return 0;
err_out:
while (p--) {
irq_set_chained_handler_and_data(output[p].parent_irq, NULL, NULL);
irq_domain_remove(output[p].domain);
}
kfree(output);
return err;