1 /* 2 * Copyright (C) 2012 Thomas Petazzoni 3 * 4 * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> 5 * 6 * This file is licensed under the terms of the GNU General Public 7 * License version 2. This program is licensed "as is" without any 8 * warranty of any kind, whether express or implied. 9 */ 10 11 #ifndef _LINUX_IRQCHIP_H 12 #define _LINUX_IRQCHIP_H 13 14 #include <linux/acpi.h> 15 #include <linux/module.h> 16 #include <linux/of.h> 17 #include <linux/of_irq.h> 18 #include <linux/platform_device.h> 19 20 /* Undefined on purpose */ 21 extern of_irq_init_cb_t typecheck_irq_init_cb; 22 23 #define typecheck_irq_init_cb(fn) \ 24 (__typecheck(typecheck_irq_init_cb, &fn) ? fn : fn) 25 26 /* 27 * This macro must be used by the different irqchip drivers to declare 28 * the association between their DT compatible string and their 29 * initialization function. 30 * 31 * @name: name that must be unique across all IRQCHIP_DECLARE of the 32 * same file. 33 * @compat: compatible string of the irqchip driver 34 * @fn: initialization function 35 */ 36 #define IRQCHIP_DECLARE(name, compat, fn) \ 37 OF_DECLARE_2(irqchip, name, compat, typecheck_irq_init_cb(fn)) 38 39 extern int platform_irqchip_probe(struct platform_device *pdev); 40 41 #define IRQCHIP_PLATFORM_DRIVER_BEGIN(drv_name) \ 42 static const struct of_device_id drv_name##_irqchip_match_table[] = { 43 44 #define IRQCHIP_MATCH(compat, fn) { .compatible = compat, \ 45 .data = typecheck_irq_init_cb(fn), }, 46 47 48 #define IRQCHIP_PLATFORM_DRIVER_END(drv_name, ...) \ 49 {}, \ 50 }; \ 51 MODULE_DEVICE_TABLE(of, drv_name##_irqchip_match_table); \ 52 static struct platform_driver drv_name##_driver = { \ 53 .probe = IS_ENABLED(CONFIG_IRQCHIP) ? \ 54 platform_irqchip_probe : NULL, \ 55 .driver = { \ 56 .name = #drv_name, \ 57 .owner = THIS_MODULE, \ 58 .of_match_table = drv_name##_irqchip_match_table, \ 59 .suppress_bind_attrs = true, \ 60 __VA_ARGS__ \ 61 }, \ 62 }; \ 63 builtin_platform_driver(drv_name##_driver) 64 65 /* 66 * This macro must be used by the different irqchip drivers to declare 67 * the association between their version and their initialization function. 68 * 69 * @name: name that must be unique across all IRQCHIP_ACPI_DECLARE of the 70 * same file. 71 * @subtable: Subtable to be identified in MADT 72 * @validate: Function to be called on that subtable to check its validity. 73 * Can be NULL. 74 * @data: data to be checked by the validate function. 75 * @fn: initialization function 76 */ 77 #define IRQCHIP_ACPI_DECLARE(name, subtable, validate, data, fn) \ 78 ACPI_DECLARE_SUBTABLE_PROBE_ENTRY(irqchip, name, \ 79 ACPI_SIG_MADT, subtable, \ 80 validate, data, fn) 81 82 #ifdef CONFIG_IRQCHIP 83 void irqchip_init(void); 84 #else 85 static inline void irqchip_init(void) {} 86 #endif 87 88 #endif 89