diff options
| -rw-r--r-- | drivers/hwmon/nct6775.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c index ffb56bb8c27d..56d7652d303b 100644 --- a/drivers/hwmon/nct6775.c +++ b/drivers/hwmon/nct6775.c @@ -511,6 +511,12 @@ 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 { @@ -2270,10 +2276,90 @@ 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, |