From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/irqchip/irqchip.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 drivers/irqchip/irqchip.c (limited to 'drivers/irqchip/irqchip.c') diff --git a/drivers/irqchip/irqchip.c b/drivers/irqchip/irqchip.c new file mode 100644 index 0000000000..1eeb0d0156 --- /dev/null +++ b/drivers/irqchip/irqchip.c @@ -0,0 +1,64 @@ +/* + * Copyright (C) 2012 Thomas Petazzoni + * + * Thomas Petazzoni + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include +#include +#include +#include +#include +#include + +/* + * This special of_device_id is the sentinel at the end of the + * of_device_id[] array of all irqchips. It is automatically placed at + * the end of the array by the linker, thanks to being part of a + * special section. + */ +static const struct of_device_id +irqchip_of_match_end __used __section("__irqchip_of_table_end"); + +extern struct of_device_id __irqchip_of_table[]; + +void __init irqchip_init(void) +{ + of_irq_init(__irqchip_of_table); + acpi_probe_device_table(irqchip); +} + +int platform_irqchip_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct device_node *par_np = of_irq_find_parent(np); + of_irq_init_cb_t irq_init_cb = of_device_get_match_data(&pdev->dev); + + if (!irq_init_cb) { + of_node_put(par_np); + return -EINVAL; + } + + if (par_np == np) + par_np = NULL; + + /* + * If there's a parent interrupt controller and none of the parent irq + * domains have been registered, that means the parent interrupt + * controller has not been initialized yet. it's not time for this + * interrupt controller to initialize. So, defer probe of this + * interrupt controller. The actual initialization callback of this + * interrupt controller can check for specific domains as necessary. + */ + if (par_np && !irq_find_matching_host(par_np, DOMAIN_BUS_ANY)) { + of_node_put(par_np); + return -EPROBE_DEFER; + } + + return irq_init_cb(np, par_np); +} +EXPORT_SYMBOL_GPL(platform_irqchip_probe); -- cgit v1.2.3