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
|
From 6637a098eabb13d068c66e83e5bb0954a5266486 Mon Sep 17 00:00:00 2001
From: Matthieu Crapet <mcrapet@gmail.com>
Date: Sun, 4 Jan 2009 14:36:38 +0100
Subject: [PATCH] EP93xx Power Management Routines
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Signed-off-by: Petr Štetiar <ynezz@true.cz>
---
arch/arm/mach-ep93xx/Makefile | 3 +
arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h | 1 +
arch/arm/mach-ep93xx/pm.c | 77 +++++++++++++++++++++++
3 files changed, 81 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-ep93xx/pm.c
diff --git a/arch/arm/mach-ep93xx/Makefile b/arch/arm/mach-ep93xx/Makefile
index bbf8f9a..2f65745 100644
--- a/arch/arm/mach-ep93xx/Makefile
+++ b/arch/arm/mach-ep93xx/Makefile
@@ -17,3 +17,6 @@ obj-$(CONFIG_MACH_GESBC9312) += gesbc9312.o
obj-$(CONFIG_MACH_MICRO9) += micro9.o
obj-$(CONFIG_MACH_TS72XX) += ts72xx.o
obj-$(CONFIG_MACH_TS72XX_SBCINFO) += ts72xx_sbcinfo.o
+
+# Power Management
+obj-$(CONFIG_PM) += pm.o
diff --git a/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h b/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h
index c0a8a95..f5218de 100644
--- a/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h
+++ b/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h
@@ -135,6 +135,7 @@
#define EP93XX_SYSCON_CLOCK_SET2 EP93XX_SYSCON_REG(0x24)
#define EP93XX_SYSCON_DEVICE_CONFIG EP93XX_SYSCON_REG(0x80)
#define EP93XX_SYSCON_DEVICE_CONFIG_CRUNCH_ENABLE 0x00800000
+#define EP93XX_SYSCON_DEVICE_CONFIG_SHENA 0x00000001
#define EP93XX_SYSCON_SWLOCK EP93XX_SYSCON_REG(0xc0)
#define EP93XX_SYSCON_CHIPID EP93XX_SYSCON_REG(0x94)
diff --git a/arch/arm/mach-ep93xx/pm.c b/arch/arm/mach-ep93xx/pm.c
new file mode 100644
index 0000000..0c4ba53
--- /dev/null
+++ b/arch/arm/mach-ep93xx/pm.c
@@ -0,0 +1,77 @@
+/*
+ * arch/arm/mach-ep93xx/pm.c
+ *
+ * EP93xx Power Management Routines
+ *
+ * Based on pm.c from Andre Renaud, Bluewater Systems Ltd.
+ *
+ * (c) Copyright 2008 Matthieu Crapet <mcrapet@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/suspend.h>
+#include <linux/sched.h>
+#include <linux/proc_fs.h>
+#include <linux/interrupt.h>
+#include <linux/sysfs.h>
+#include <linux/module.h>
+#include <mach/hardware.h>
+
+
+static inline void ep93xx_standby(void)
+{
+ u32 v;
+ v = __raw_readl(EP93XX_SYSCON_DEVICE_CONFIG);
+ v |= EP93XX_SYSCON_DEVICE_CONFIG_SHENA;
+ __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
+ __raw_writel(v, EP93XX_SYSCON_DEVICE_CONFIG);
+
+ v = __raw_readl(EP93XX_SYSCON_STANDBY);
+
+ asm("nop; nop; nop; nop; nop");
+}
+
+static inline void ep93xx_resume(void)
+{
+ u32 v;
+
+ v = __raw_readl(EP93XX_SYSCON_DEVICE_CONFIG);
+ v &= ~EP93XX_SYSCON_DEVICE_CONFIG_SHENA;
+ __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
+ __raw_writel(v, EP93XX_SYSCON_DEVICE_CONFIG);
+}
+
+static int suspend_ep93xx_enter(suspend_state_t state)
+{
+ switch (state) {
+ case PM_SUSPEND_STANDBY:
+ case PM_SUSPEND_MEM:
+ ep93xx_standby(); /* go zzz */
+ ep93xx_resume();
+ }
+ return 0;
+}
+
+static int suspend_ep93xx_valid(suspend_state_t state)
+{
+ return (state == PM_SUSPEND_STANDBY) ||
+ (state == PM_SUSPEND_MEM);
+}
+
+
+static struct platform_suspend_ops ep93xx_suspend_ops = {
+ .enter = suspend_ep93xx_enter,
+ .valid = suspend_ep93xx_valid,
+};
+
+static int __init ep93xx_pm_init(void)
+{
+ pr_info("ep93xx: Power Management\n");
+ suspend_set_ops(&ep93xx_suspend_ops);
+ return 0;
+}
+__initcall(ep93xx_pm_init);
--
1.6.0.4
|
