1 files changed, 133 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/ppc4xx_suspend.c b/arch/powerpc/sysdev/ppc4xx_suspend.c
new file mode 100644
index 00000000000..9aab914fdaf
--- /dev/null
+++ b/arch/powerpc/sysdev/ppc4xx_suspend.c
@@ -0,0 +1,133 @@
+/*
+ * PowerPC 4xx suspend and standby support
+ *
+ * (C) Copyright 2009, Applied Micro Circuits Corporation
+ * Victor Gallardo (vgallardo@amcc.com)
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/suspend.h>
+#include <linux/kobject.h>
+#include <linux/string.h>
+#include <asm/ppc4xx_cpm.h>
+
+#define CONFIG_PM_DEBUG
+
+#if defined(CONFIG_PM_DEBUG)
+#	define PM_DEBUG(fmt, arg...) printk(KERN_DEBUG fmt, ## arg)
+#else
+#	define PM_DEBUG(fmt, arg...) ((void)0)
+#endif
+
+
+static int suspend_mode = CPM_PM_DOZE;
+
+static ssize_t ppc_4xx_suspend_available_modes_show(struct kobject *kobj,
+			struct kobj_attribute *attr, char *buf)
+{
+	char *s = buf;
+	int i;
+
+	for (i = 0; i < CPM_PM_MODES_MAX; i++) {
+		s += sprintf(s, "%s ", cpm_mode_name(i));
+	}
+
+	*(s-1) = '\n'; /* convert the last space to a newline */
+
+	return (s - buf);
+}
+
+static ssize_t ppc_4xx_suspend_mode_show(struct kobject *kobj,
+			struct kobj_attribute *attr, char *buf)
+{
+	char *s = buf;
+	s += sprintf(s, "%s\n", cpm_mode_name(suspend_mode));
+	return (s - buf);
+}
+
+static ssize_t ppc_4xx_suspend_mode_store(struct kobject *kobj,
+			struct kobj_attribute *attr, const char *buf, size_t n)
+{
+	int i;
+	char *p;
+	int len;
+
+	p = memchr(buf, '\n', n);
+	len = p ? p - buf : n;
+
+	for (i = 0; i < CPM_PM_MODES_MAX; i++) {
+		if (strncmp(buf, cpm_mode_name(i), len) == 0) {
+			suspend_mode = i;
+			return n;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static struct kobj_attribute ppc_4xx_suspend_available_modes_attr =
+	__ATTR(suspend_available_modes, 0444,
+	       ppc_4xx_suspend_available_modes_show, NULL);
+
+static struct kobj_attribute ppc_4xx_suspend_mode_attr =
+	__ATTR(suspend_mode, 0644,
+	       ppc_4xx_suspend_mode_show, ppc_4xx_suspend_mode_store);
+
+
+static int ppc4xx_suspend_valid(suspend_state_t state)
+{
+	return ((state == PM_SUSPEND_STANDBY) || (state == PM_SUSPEND_MEM));
+}
+
+static int ppc4xx_suspend_enter(suspend_state_t state)
+{
+	PM_DEBUG("%s\n", __func__);
+	switch (state) {
+	case PM_SUSPEND_STANDBY:
+	case PM_SUSPEND_MEM:
+		cpm_pm_suspend(state, suspend_mode);
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static struct platform_suspend_ops ppc4xx_suspend_ops = {
+	.valid = ppc4xx_suspend_valid,
+	.enter = ppc4xx_suspend_enter,
+};
+
+int __init ppc4xx_suspend_init(void)
+{
+	int err;
+	suspend_set_ops(&ppc4xx_suspend_ops);
+	PM_DEBUG("Create sysfs power");
+	err = sysfs_create_file(power_kobj, 
+		&ppc_4xx_suspend_mode_attr.attr);
+	
+	err = sysfs_create_file(power_kobj, 
+		&ppc_4xx_suspend_available_modes_attr.attr);
+	return 0;
+}
+
+arch_initcall(ppc4xx_suspend_init);
+