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19#include <linux/kernel.h>
20#include <linux/clk.h>
21#include <linux/io.h>
22#include <linux/err.h>
23#include <linux/delay.h>
24#include <linux/of.h>
25#include <linux/of_address.h>
26
27#include <asm/system_misc.h>
28#include <asm/proc-fns.h>
29#include <asm/mach-types.h>
30#include <asm/hardware/cache-l2x0.h>
31
32#include "common.h"
33#include "hardware.h"
34
35static void __iomem *wdog_base;
36static struct clk *wdog_clk;
37
38
39
40
41void mxc_restart(enum reboot_mode mode, const char *cmd)
42{
43 unsigned int wcr_enable;
44
45 if (!wdog_base)
46 goto reset_fallback;
47
48 if (!IS_ERR(wdog_clk))
49 clk_enable(wdog_clk);
50
51 if (cpu_is_mx1())
52 wcr_enable = (1 << 0);
53 else
54 wcr_enable = (1 << 2);
55
56
57 __raw_writew(wcr_enable, wdog_base);
58
59
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62
63
64
65 __raw_writew(wcr_enable, wdog_base);
66 __raw_writew(wcr_enable, wdog_base);
67
68
69 mdelay(500);
70
71 pr_err("%s: Watchdog reset failed to assert reset\n", __func__);
72
73
74 mdelay(50);
75
76reset_fallback:
77
78 soft_restart(0);
79}
80
81void __init mxc_arch_reset_init(void __iomem *base)
82{
83 wdog_base = base;
84
85 wdog_clk = clk_get_sys("imx2-wdt.0", NULL);
86 if (IS_ERR(wdog_clk))
87 pr_warn("%s: failed to get wdog clock\n", __func__);
88 else
89 clk_prepare(wdog_clk);
90}
91
92void __init mxc_arch_reset_init_dt(void)
93{
94 struct device_node *np;
95
96 np = of_find_compatible_node(NULL, NULL, "fsl,imx21-wdt");
97 wdog_base = of_iomap(np, 0);
98 WARN_ON(!wdog_base);
99
100 wdog_clk = of_clk_get(np, 0);
101 if (IS_ERR(wdog_clk))
102 pr_warn("%s: failed to get wdog clock\n", __func__);
103 else
104 clk_prepare(wdog_clk);
105}
106
107#ifdef CONFIG_CACHE_L2X0
108void __init imx_init_l2cache(void)
109{
110 void __iomem *l2x0_base;
111 struct device_node *np;
112 unsigned int val;
113
114 np = of_find_compatible_node(NULL, NULL, "arm,pl310-cache");
115 if (!np)
116 goto out;
117
118 l2x0_base = of_iomap(np, 0);
119 if (!l2x0_base) {
120 of_node_put(np);
121 goto out;
122 }
123
124
125 val = readl_relaxed(l2x0_base + L310_PREFETCH_CTRL);
126 val |= 0x70800000;
127
128
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135
136 if (cpu_is_imx6q())
137 val &= ~(1 << 30 | 1 << 23);
138 writel_relaxed(val, l2x0_base + L310_PREFETCH_CTRL);
139
140 iounmap(l2x0_base);
141 of_node_put(np);
142
143out:
144 l2x0_of_init(0, ~0);
145}
146#endif
147