f198500283
Both IRQCHIP_DECLARE() and IRQCHIP_MATCH() use an underlying of_device_id() structure to encode the matching property and the init callback. However, this callback is stored in as a void * pointer, which obviously defeat any attempt at stronger type checking. Work around this by providing a new macro that builds on top of the __typecheck() primitive, and that can be used to warn when there is a discrepency between the drivers and core code. Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211020104527.3066268-1-maz@kernel.org
85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/*
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* Copyright (C) 2012 Thomas Petazzoni
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*
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* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#ifndef _LINUX_IRQCHIP_H
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#define _LINUX_IRQCHIP_H
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#include <linux/acpi.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_irq.h>
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#include <linux/platform_device.h>
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/* Undefined on purpose */
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extern of_irq_init_cb_t typecheck_irq_init_cb;
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#define typecheck_irq_init_cb(fn) \
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(__typecheck(typecheck_irq_init_cb, &fn) ? fn : fn)
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/*
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* This macro must be used by the different irqchip drivers to declare
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* the association between their DT compatible string and their
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* initialization function.
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*
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* @name: name that must be unique across all IRQCHIP_DECLARE of the
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* same file.
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* @compstr: compatible string of the irqchip driver
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* @fn: initialization function
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*/
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#define IRQCHIP_DECLARE(name, compat, fn) \
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OF_DECLARE_2(irqchip, name, compat, typecheck_irq_init_cb(fn))
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extern int platform_irqchip_probe(struct platform_device *pdev);
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#define IRQCHIP_PLATFORM_DRIVER_BEGIN(drv_name) \
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static const struct of_device_id drv_name##_irqchip_match_table[] = {
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#define IRQCHIP_MATCH(compat, fn) { .compatible = compat, \
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.data = typecheck_irq_init_cb(fn), },
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#define IRQCHIP_PLATFORM_DRIVER_END(drv_name) \
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{}, \
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}; \
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MODULE_DEVICE_TABLE(of, drv_name##_irqchip_match_table); \
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static struct platform_driver drv_name##_driver = { \
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.probe = platform_irqchip_probe, \
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.driver = { \
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.name = #drv_name, \
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.owner = THIS_MODULE, \
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.of_match_table = drv_name##_irqchip_match_table, \
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.suppress_bind_attrs = true, \
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}, \
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}; \
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builtin_platform_driver(drv_name##_driver)
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/*
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* This macro must be used by the different irqchip drivers to declare
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* the association between their version and their initialization function.
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*
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* @name: name that must be unique across all IRQCHIP_ACPI_DECLARE of the
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* same file.
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* @subtable: Subtable to be identified in MADT
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* @validate: Function to be called on that subtable to check its validity.
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* Can be NULL.
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* @data: data to be checked by the validate function.
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* @fn: initialization function
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*/
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#define IRQCHIP_ACPI_DECLARE(name, subtable, validate, data, fn) \
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ACPI_DECLARE_SUBTABLE_PROBE_ENTRY(irqchip, name, \
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ACPI_SIG_MADT, subtable, \
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validate, data, fn)
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#ifdef CONFIG_IRQCHIP
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void irqchip_init(void);
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#else
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static inline void irqchip_init(void) {}
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#endif
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#endif
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