1 files changed, 74 insertions, 1 deletions

diff --git a/drivers/hwmon/w83627hf.c b/drivers/hwmon/w83627hf.c
index 7f68b8309d10..9170746e9743 100644
--- a/drivers/hwmon/w83627hf.c
+++ b/drivers/hwmon/w83627hf.c
@@ -5,7 +5,7 @@
  *                            Philip Edelbrock <phil@netroedge.com>,
  *                            and Mark Studebaker <mdsxyz123@yahoo.com>
  * Ported to 2.6 by Bernhard C. Schrenk <clemy@clemy.org>
- * Copyright (c) 2007  Jean Delvare <khali@linux-fr.org>
+ * Copyright (c) 2007 - 1012  Jean Delvare <khali@linux-fr.org>
  *
  * 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
@@ -389,6 +389,12 @@ struct w83627hf_data {
                                  */
         u8 vrm;
         u8 vrm_ovt;             /* Register value, 627THF/637HF/687THF only */
+
+#ifdef CONFIG_PM
+        /* Remember extra register values over suspend/resume */
+        u8 scfg1;
+        u8 scfg2;
+#endif
 };
 
 
@@ -401,10 +407,77 @@ static void w83627hf_update_fan_div(struct w83627hf_data *data);
 static struct w83627hf_data *w83627hf_update_device(struct device *dev);
 static void w83627hf_init_device(struct platform_device *pdev);
 
+#ifdef CONFIG_PM
+static int w83627hf_suspend(struct device *dev)
+{
+        struct w83627hf_data *data = w83627hf_update_device(dev);
+
+        mutex_lock(&data->update_lock);
+        data->scfg1 = w83627hf_read_value(data, W83781D_REG_SCFG1);
+        data->scfg2 = w83627hf_read_value(data, W83781D_REG_SCFG2);
+        mutex_unlock(&data->update_lock);
+
+        return 0;
+}
+
+static int w83627hf_resume(struct device *dev)
+{
+        struct w83627hf_data *data = dev_get_drvdata(dev);
+        int i, num_temps = (data->type == w83697hf) ? 2 : 3;
+
+        /* Restore limits */
+        mutex_lock(&data->update_lock);
+        for (i = 0; i <= 8; i++) {
+                /* skip missing sensors */
+                if (((data->type == w83697hf) && (i == 1)) ||
+                    ((data->type != w83627hf && data->type != w83697hf)
+                    && (i == 5 || i == 6)))
+                        continue;
+                w83627hf_write_value(data, W83781D_REG_IN_MAX(i),
+                                     data->in_max[i]);
+                w83627hf_write_value(data, W83781D_REG_IN_MIN(i),
+                                     data->in_min[i]);
+        }
+        for (i = 0; i <= 2; i++)
+                w83627hf_write_value(data, W83627HF_REG_FAN_MIN(i),
+                                     data->fan_min[i]);
+        for (i = 0; i < num_temps; i++) {
+                w83627hf_write_value(data, w83627hf_reg_temp_over[i],
+                                     data->temp_max[i]);
+                w83627hf_write_value(data, w83627hf_reg_temp_hyst[i],
+                                     data->temp_max_hyst[i]);
+        }
+
+        /* Fixup BIOS bugs */
+        if (data->type == w83627thf || data->type == w83637hf ||
+            data->type == w83687thf)
+                w83627hf_write_value(data, W83627THF_REG_VRM_OVT_CFG,
+                                     data->vrm_ovt);
+        w83627hf_write_value(data, W83781D_REG_SCFG1, data->scfg1);
+        w83627hf_write_value(data, W83781D_REG_SCFG2, data->scfg2);
+
+        /* Force re-reading all values */
+        data->valid = 0;
+        mutex_unlock(&data->update_lock);
+
+        return 0;
+}
+
+static const struct dev_pm_ops w83627hf_dev_pm_ops = {
+        .suspend = w83627hf_suspend,
+        .resume = w83627hf_resume,
+};
+
+#define W83627HF_DEV_PM_OPS     (&w83627hf_dev_pm_ops)
+#else
+#define W83627HF_DEV_PM_OPS     NULL
+#endif /* CONFIG_PM */
+
 static struct platform_driver w83627hf_driver = {
         .driver = {
                 .owner  = THIS_MODULE,
                 .name   = DRVNAME,
+                .pm     = W83627HF_DEV_PM_OPS,
         },
         .probe          = w83627hf_probe,
         .remove         = w83627hf_remove,