diff options
| -rw-r--r-- | drivers/irqchip/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/irqchip/Makefile | 2 | ||||
| -rw-r--r-- | drivers/irqchip/irqchip.c | 30 | ||||
| -rw-r--r-- | drivers/irqchip/irqchip.h | 29 | ||||
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 12 | ||||
| -rw-r--r-- | include/linux/irqchip.h | 16 |
6 files changed, 92 insertions, 1 deletions
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index 62ca575..93dfd8f 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -1,3 +1,7 @@ +config IRQCHIP + def_bool y + depends on OF_IRQ + config VERSATILE_FPGA_IRQ bool select IRQ_DOMAIN diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index bf4609a..29b78c9 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -1,3 +1,5 @@ +obj-$(CONFIG_IRQCHIP) += irqchip.o + obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2835.o obj-$(CONFIG_ARCH_SUNXI) += irq-sunxi.o obj-$(CONFIG_VERSATILE_FPGA_IRQ) += irq-versatile-fpga.o diff --git a/drivers/irqchip/irqchip.c b/drivers/irqchip/irqchip.c new file mode 100644 index 0000000..f496afc --- /dev/null +++ b/drivers/irqchip/irqchip.c @@ -0,0 +1,30 @@ +/* + * Copyright (C) 2012 Thomas Petazzoni + * + * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> + * + * 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 <linux/init.h> +#include <linux/of_irq.h> + +#include "irqchip.h" + +/* + * 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_end); + +extern struct of_device_id __irqchip_begin[]; + +void __init irqchip_init(void) +{ + of_irq_init(__irqchip_begin); +} diff --git a/drivers/irqchip/irqchip.h b/drivers/irqchip/irqchip.h new file mode 100644 index 0000000..e445ba2 --- /dev/null +++ b/drivers/irqchip/irqchip.h @@ -0,0 +1,29 @@ +/* + * Copyright (C) 2012 Thomas Petazzoni + * + * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> + * + * 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. + */ + +#ifndef _IRQCHIP_H +#define _IRQCHIP_H + +/* + * This macro must be used by the different irqchip drivers to declare + * the association between their DT compatible string and their + * initialization function. + * + * @name: name that must be unique accross all IRQCHIP_DECLARE of the + * same file. + * @compstr: compatible string of the irqchip driver + * @fn: initialization function + */ +#define IRQCHIP_DECLARE(name,compstr,fn) \ + static const struct of_device_id irqchip_of_match_##name \ + __used __section(__irqchip_of_table) \ + = { .compatible = compstr, .data = fn } + +#endif diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index d1ea7ce..c80c599 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -149,6 +149,15 @@ #define TRACE_SYSCALLS() #endif +#ifdef CONFIG_IRQCHIP +#define IRQCHIP_OF_MATCH_TABLE() \ + . = ALIGN(8); \ + VMLINUX_SYMBOL(__irqchip_begin) = .; \ + *(__irqchip_of_table) \ + *(__irqchip_of_end) +#else +#define IRQCHIP_OF_MATCH_TABLE() +#endif #define KERNEL_DTB() \ STRUCT_ALIGN(); \ @@ -493,7 +502,8 @@ DEV_DISCARD(init.rodata) \ CPU_DISCARD(init.rodata) \ MEM_DISCARD(init.rodata) \ - KERNEL_DTB() + KERNEL_DTB() \ + IRQCHIP_OF_MATCH_TABLE() #define INIT_TEXT \ *(.init.text) \ diff --git a/include/linux/irqchip.h b/include/linux/irqchip.h new file mode 100644 index 0000000..e0006f1 --- /dev/null +++ b/include/linux/irqchip.h @@ -0,0 +1,16 @@ +/* + * Copyright (C) 2012 Thomas Petazzoni + * + * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> + * + * 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. + */ + +#ifndef _LINUX_IRQCHIP_H +#define _LINUX_IRQCHIP_H + +void irqchip_init(void); + +#endif |