diff options
Diffstat (limited to 'arch/arm/mach-orion5x/irq.c')
| -rw-r--r-- | arch/arm/mach-orion5x/irq.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/arm/mach-orion5x/irq.c b/arch/arm/mach-orion5x/irq.c new file mode 100644 index 000000000..cd4bac4d7 --- /dev/null +++ b/arch/arm/mach-orion5x/irq.c @@ -0,0 +1,65 @@ +/* + * arch/arm/mach-orion5x/irq.c + * + * Core IRQ functions for Marvell Orion System On Chip + * + * Maintainer: Tzachi Perelstein <tzachi@marvell.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/gpio.h> +#include <linux/kernel.h> +#include <linux/irq.h> +#include <linux/io.h> +#include <mach/bridge-regs.h> +#include <plat/orion-gpio.h> +#include <plat/irq.h> +#include <asm/exception.h> +#include "common.h" + +static int __initdata gpio0_irqs[4] = { + IRQ_ORION5X_GPIO_0_7, + IRQ_ORION5X_GPIO_8_15, + IRQ_ORION5X_GPIO_16_23, + IRQ_ORION5X_GPIO_24_31, +}; + +#ifdef CONFIG_MULTI_IRQ_HANDLER +/* + * Compiling with both non-DT and DT support enabled, will + * break asm irq handler used by non-DT boards. Therefore, + * we provide a C-style irq handler even for non-DT boards, + * if MULTI_IRQ_HANDLER is set. + */ + +asmlinkage void +__exception_irq_entry orion5x_legacy_handle_irq(struct pt_regs *regs) +{ + u32 stat; + + stat = readl_relaxed(MAIN_IRQ_CAUSE); + stat &= readl_relaxed(MAIN_IRQ_MASK); + if (stat) { + unsigned int hwirq = __fls(stat); + handle_IRQ(hwirq, regs); + return; + } +} +#endif + +void __init orion5x_init_irq(void) +{ + orion_irq_init(0, MAIN_IRQ_MASK); + +#ifdef CONFIG_MULTI_IRQ_HANDLER + set_handle_irq(orion5x_legacy_handle_irq); +#endif + + /* + * Initialize gpiolib for GPIOs 0-31. + */ + orion_gpio_init(NULL, 0, 32, GPIO_VIRT_BASE, 0, + IRQ_ORION5X_GPIO_START, gpio0_irqs); +} |