2 * Copyright 2011 Freescale Semiconductor, Inc.
3 * Copyright 2011 Linaro Ltd.
5 * The code contained herein is licensed under the GNU General Public
6 * License. You may obtain a copy of the GNU General Public License
7 * Version 2 or later at the following locations:
9 * http://www.opensource.org/licenses/gpl-license.html
10 * http://www.gnu.org/copyleft/gpl.html
13 #include <linux/delay.h>
14 #include <linux/init.h>
16 #include <linux/irq.h>
17 #include <linux/irqdomain.h>
19 #include <linux/of_address.h>
20 #include <linux/of_irq.h>
21 #include <linux/of_platform.h>
22 #include <asm/hardware/cache-l2x0.h>
23 #include <asm/hardware/gic.h>
24 #include <asm/mach/arch.h>
25 #include <asm/mach/time.h>
26 #include <mach/common.h>
27 #include <mach/hardware.h>
29 void imx6q_restart(char mode, const char *cmd)
31 struct device_node *np;
32 void __iomem *wdog_base;
34 np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-wdt");
35 wdog_base = of_iomap(np, 0);
39 imx_src_prepare_restart();
42 writew_relaxed(1 << 2, wdog_base);
43 /* write twice to ensure the request will not get ignored */
44 writew_relaxed(1 << 2, wdog_base);
46 /* wait for reset to assert ... */
49 pr_err("Watchdog reset failed to assert reset\n");
51 /* delay to allow the serial port to show the message */
55 /* we'll take a jump through zero as a poor second */
59 static void __init imx6q_init_machine(void)
61 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
66 static void __init imx6q_map_io(void)
73 static int __init imx6q_gpio_add_irq_domain(struct device_node *np,
74 struct device_node *interrupt_parent)
76 static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS;
79 irq_domain_add_simple(np, gpio_irq_base);
84 static const struct of_device_id imx6q_irq_match[] __initconst = {
85 { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
86 { .compatible = "fsl,imx6q-gpio", .data = imx6q_gpio_add_irq_domain, },
90 static void __init imx6q_init_irq(void)
92 l2x0_of_init(0, ~0UL);
95 of_irq_init(imx6q_irq_match);
98 static void __init imx6q_timer_init(void)
103 static struct sys_timer imx6q_timer = {
104 .init = imx6q_timer_init,
107 static const char *imx6q_dt_compat[] __initdata = {
108 "fsl,imx6q-sabreauto",
112 DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad (Device Tree)")
113 .map_io = imx6q_map_io,
114 .init_irq = imx6q_init_irq,
115 .handle_irq = imx6q_handle_irq,
116 .timer = &imx6q_timer,
117 .init_machine = imx6q_init_machine,
118 .dt_compat = imx6q_dt_compat,
119 .restart = imx6q_restart,