1 /* 2 * arch/arm/mach-orion5x/irq.c 3 * 4 * Core IRQ functions for Marvell Orion System On Chip 5 * 6 * Maintainer: Tzachi Perelstein <tzachi@marvell.com> 7 * 8 * This file is licensed under the terms of the GNU General Public 9 * License version 2. This program is licensed "as is" without any 10 * warranty of any kind, whether express or implied. 11 */ 12 #include <linux/gpio.h> 13 #include <linux/kernel.h> 14 #include <linux/init.h> 15 #include <linux/irq.h> 16 #include <linux/io.h> 17 #include <mach/bridge-regs.h> 18 #include <plat/irq.h> 19 #include "common.h" 20 21 static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) 22 { 23 BUG_ON(irq < IRQ_ORION5X_GPIO_0_7 || irq > IRQ_ORION5X_GPIO_24_31); 24 25 orion_gpio_irq_handler((irq - IRQ_ORION5X_GPIO_0_7) << 3); 26 } 27 28 void __init orion5x_init_irq(void) 29 { 30 orion_irq_init(0, (void __iomem *)MAIN_IRQ_MASK); 31 32 /* 33 * Initialize gpiolib for GPIOs 0-31. 34 */ 35 orion_gpio_init(0, 32, GPIO_VIRT_BASE, 0, IRQ_ORION5X_GPIO_START); 36 irq_set_chained_handler(IRQ_ORION5X_GPIO_0_7, gpio_irq_handler); 37 irq_set_chained_handler(IRQ_ORION5X_GPIO_8_15, gpio_irq_handler); 38 irq_set_chained_handler(IRQ_ORION5X_GPIO_16_23, gpio_irq_handler); 39 irq_set_chained_handler(IRQ_ORION5X_GPIO_24_31, gpio_irq_handler); 40 } 41