diff options
| author | Marc Gonzalez <marc_gonzalez@sigmadesigns.com> | 2016-09-02 16:17:17 +0300 |
|---|---|---|
| committer | Zhang Rui <rui.zhang@intel.com> | 2016-09-27 09:02:16 +0300 |
| commit | 9dfe1a2f9a5a582931e9ecf3efd8dac5e1f89072 (patch) | |
| tree | eba37e4472af80abb6febba030bf0e3b343aaa4d /drivers/thermal/tango_thermal.c | |
| parent | e3da1cbed64a19babe91775e21fcd8887039e711 (diff) | |
| download | linux-9dfe1a2f9a5a582931e9ecf3efd8dac5e1f89072.tar.xz | |
thermal: tango: add resume support
When this platform is suspended, firmware powers the entire SoC down,
except a few hardware blocks waiting for wakeup events. There is no
context to save for this particular block.
Therefore, there is nothing useful for the driver to do on suspend;
so we define a NULL suspend hook. On resume, the driver initializes
the block exactly as is done in the probe callback.
Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Diffstat (limited to 'drivers/thermal/tango_thermal.c')
| -rw-r--r-- | drivers/thermal/tango_thermal.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/thermal/tango_thermal.c b/drivers/thermal/tango_thermal.c index 70e0d9f406e9..201304aeafeb 100644 --- a/drivers/thermal/tango_thermal.c +++ b/drivers/thermal/tango_thermal.c @@ -64,6 +64,12 @@ static const struct thermal_zone_of_device_ops ops = { .get_temp = tango_get_temp, }; +static void tango_thermal_init(struct tango_thermal_priv *priv) +{ + writel(0, priv->base + TEMPSI_CFG); + writel(CMD_ON, priv->base + TEMPSI_CMD); +} + static int tango_thermal_probe(struct platform_device *pdev) { struct resource *res; @@ -79,14 +85,22 @@ static int tango_thermal_probe(struct platform_device *pdev) if (IS_ERR(priv->base)) return PTR_ERR(priv->base); + platform_set_drvdata(pdev, priv); priv->thresh_idx = IDX_MIN; - writel(0, priv->base + TEMPSI_CFG); - writel(CMD_ON, priv->base + TEMPSI_CMD); + tango_thermal_init(priv); tzdev = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, priv, &ops); return PTR_ERR_OR_ZERO(tzdev); } +static int __maybe_unused tango_thermal_resume(struct device *dev) +{ + tango_thermal_init(dev_get_drvdata(dev)); + return 0; +} + +static SIMPLE_DEV_PM_OPS(tango_thermal_pm, NULL, tango_thermal_resume); + static const struct of_device_id tango_sensor_ids[] = { { .compatible = "sigma,smp8758-thermal", @@ -99,6 +113,7 @@ static struct platform_driver tango_thermal_driver = { .driver = { .name = "tango-thermal", .of_match_table = tango_sensor_ids, + .pm = &tango_thermal_pm, }, }; |