1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/*
* Copyright 2011 Freescale Semiconductor, Inc.
* Copyright 2011 Linaro Ltd.
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/phy.h>
#include <linux/micrel_phy.h>
#include <asm/smp_twd.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/hardware/gic.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include <asm/system_misc.h>
#include <mach/common.h>
#include <mach/hardware.h>
void imx6q_restart(char mode, const char *cmd)
{
struct device_node *np;
void __iomem *wdog_base;
np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-wdt");
wdog_base = of_iomap(np, 0);
if (!wdog_base)
goto soft;
imx_src_prepare_restart();
/* enable wdog */
writew_relaxed(1 << 2, wdog_base);
/* write twice to ensure the request will not get ignored */
writew_relaxed(1 << 2, wdog_base);
/* wait for reset to assert ... */
mdelay(500);
pr_err("Watchdog reset failed to assert reset\n");
/* delay to allow the serial port to show the message */
mdelay(50);
soft:
/* we'll take a jump through zero as a poor second */
soft_restart(0);
}
/* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */
static int ksz9021rn_phy_fixup(struct phy_device *phydev)
{
if (IS_ENABLED(CONFIG_PHYLIB)) {
/* min rx data delay */
phy_write(phydev, 0x0b, 0x8105);
phy_write(phydev, 0x0c, 0x0000);
/* max rx/tx clock delay, min rx/tx control delay */
phy_write(phydev, 0x0b, 0x8104);
phy_write(phydev, 0x0c, 0xf0f0);
phy_write(phydev, 0x0b, 0x104);
}
return 0;
}
static void __init imx6q_sabrelite_init(void)
{
if (IS_ENABLED(CONFIG_PHYLIB))
phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
ksz9021rn_phy_fixup);
}
static void __init imx6q_init_machine(void)
{
if (of_machine_is_compatible("fsl,imx6q-sabrelite"))
imx6q_sabrelite_init();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
imx6q_pm_init();
}
static void __init imx6q_map_io(void)
{
imx_lluart_map_io();
imx_scu_map_io();
imx6q_clock_map_io();
}
static int __init imx6q_gpio_add_irq_domain(struct device_node *np,
struct device_node *interrupt_parent)
{
static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS;
gpio_irq_base -= 32;
irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops,
NULL);
return 0;
}
static const struct of_device_id imx6q_irq_match[] __initconst = {
{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
{ .compatible = "fsl,imx6q-gpio", .data = imx6q_gpio_add_irq_domain, },
{ /* sentinel */ }
};
static void __init imx6q_init_irq(void)
{
l2x0_of_init(0, ~0UL);
imx_src_init();
imx_gpc_init();
of_irq_init(imx6q_irq_match);
}
static void __init imx6q_timer_init(void)
{
mx6q_clocks_init();
twd_local_timer_of_register();
}
static struct sys_timer imx6q_timer = {
.init = imx6q_timer_init,
};
static const char *imx6q_dt_compat[] __initdata = {
"fsl,imx6q-arm2",
"fsl,imx6q-sabrelite",
"fsl,imx6q-sabresd",
"fsl,imx6q",
NULL,
};
DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad (Device Tree)")
.map_io = imx6q_map_io,
.init_irq = imx6q_init_irq,
.handle_irq = imx6q_handle_irq,
.timer = &imx6q_timer,
.init_machine = imx6q_init_machine,
.dt_compat = imx6q_dt_compat,
.restart = imx6q_restart,
MACHINE_END
|
