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Date: Tue, 26 Feb 2013 10:23:35 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Jean Delvare <khali@...ux-fr.org>
Cc: lm-sensors@...sensors.org, linux-kernel@...r.kernel.org,
Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH v5 07/12] hwmon: (nct6775) Add power management support
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
drivers/hwmon/nct6775.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)
diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c
index ac8be97..96e2ee1 100644
--- a/drivers/hwmon/nct6775.c
+++ b/drivers/hwmon/nct6775.c
@@ -508,6 +508,12 @@ struct nct6775_data {
u16 have_temp;
u16 have_temp_fixed;
u16 have_in;
+#ifdef CONFIG_PM
+ /* Remember extra register values over suspend/resume */
+ u8 vbat;
+ u8 fandiv1;
+ u8 fandiv2;
+#endif
};
struct nct6775_sio_data {
@@ -2267,10 +2273,90 @@ static int nct6775_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
+static int nct6775_suspend(struct device *dev)
+{
+ struct nct6775_data *data = nct6775_update_device(dev);
+ struct nct6775_sio_data *sio_data = dev->platform_data;
+
+ mutex_lock(&data->update_lock);
+ data->vbat = nct6775_read_value(data, data->REG_VBAT);
+ if (sio_data->kind == nct6775) {
+ data->fandiv1 = nct6775_read_value(data, NCT6775_REG_FANDIV1);
+ data->fandiv2 = nct6775_read_value(data, NCT6775_REG_FANDIV2);
+ }
+ mutex_unlock(&data->update_lock);
+
+ return 0;
+}
+
+static int nct6775_resume(struct device *dev)
+{
+ struct nct6775_data *data = dev_get_drvdata(dev);
+ struct nct6775_sio_data *sio_data = dev->platform_data;
+ int i, j;
+
+ mutex_lock(&data->update_lock);
+ data->bank = 0xff; /* Force initial bank selection */
+
+ /* Restore limits */
+ for (i = 0; i < data->in_num; i++) {
+ if (!(data->have_in & (1 << i)))
+ continue;
+
+ nct6775_write_value(data, data->REG_IN_MINMAX[0][i],
+ data->in[i][1]);
+ nct6775_write_value(data, data->REG_IN_MINMAX[1][i],
+ data->in[i][2]);
+ }
+
+ for (i = 0; i < 5; i++) {
+ if (!(data->has_fan_min & (1 << i)))
+ continue;
+
+ nct6775_write_value(data, data->REG_FAN_MIN[i],
+ data->fan_min[i]);
+ }
+
+ for (i = 0; i < NUM_TEMP; i++) {
+ if (!(data->have_temp & (1 << i)))
+ continue;
+
+ for (j = 1; j < 4; j++)
+ if (data->reg_temp[j][i])
+ nct6775_write_temp(data, data->reg_temp[j][i],
+ data->temp[j][i]);
+ }
+
+ /* Restore other settings */
+ nct6775_write_value(data, data->REG_VBAT, data->vbat);
+ if (sio_data->kind == nct6775) {
+ nct6775_write_value(data, NCT6775_REG_FANDIV1, data->fandiv1);
+ nct6775_write_value(data, NCT6775_REG_FANDIV2, data->fandiv2);
+ }
+
+ /* Force re-reading all values */
+ data->valid = false;
+ mutex_unlock(&data->update_lock);
+
+ return 0;
+}
+
+static const struct dev_pm_ops nct6775_dev_pm_ops = {
+ .suspend = nct6775_suspend,
+ .resume = nct6775_resume,
+};
+
+#define NCT6775_DEV_PM_OPS (&nct6775_dev_pm_ops)
+#else
+#define NCT6775_DEV_PM_OPS NULL
+#endif /* CONFIG_PM */
+
static struct platform_driver nct6775_driver = {
.driver = {
.owner = THIS_MODULE,
.name = DRVNAME,
+ .pm = NCT6775_DEV_PM_OPS,
},
.probe = nct6775_probe,
.remove = nct6775_remove,
--
1.7.9.7
--
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