Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * Copyright (C) 2012 Thomas Petazzoni
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * This file is licensed under the terms of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * License version 2.  This program is licensed "as is" without any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * warranty of any kind, whether express or implied.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/of_irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/irqchip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  * This special of_device_id is the sentinel at the end of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)  * of_device_id[] array of all irqchips. It is automatically placed at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)  * the end of the array by the linker, thanks to being part of a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)  * special section.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static const struct of_device_id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) irqchip_of_match_end __used __section("__irqchip_of_table_end");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) extern struct of_device_id __irqchip_of_table[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) void __init irqchip_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	of_irq_init(__irqchip_of_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	acpi_probe_device_table(irqchip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) int platform_irqchip_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	struct device_node *np = pdev->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	struct device_node *par_np = of_irq_find_parent(np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	of_irq_init_cb_t irq_init_cb = of_device_get_match_data(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	if (!irq_init_cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	if (par_np == np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		par_np = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	 * If there's a parent interrupt controller and  none of the parent irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	 * domains have been registered, that means the parent interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	 * controller has not been initialized yet.  it's not time for this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	 * interrupt controller to initialize. So, defer probe of this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	 * interrupt controller. The actual initialization callback of this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	 * interrupt controller can check for specific domains as necessary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	if (par_np && !irq_find_matching_host(par_np, DOMAIN_BUS_ANY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 		return -EPROBE_DEFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	return irq_init_cb(np, par_np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) EXPORT_SYMBOL_GPL(platform_irqchip_probe);