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authorMarc Gonzalez <marc_gonzalez@sigmadesigns.com>2016-09-02 16:17:17 +0300
committerZhang Rui <rui.zhang@intel.com>2016-09-27 09:02:16 +0300
commit9dfe1a2f9a5a582931e9ecf3efd8dac5e1f89072 (patch)
treeeba37e4472af80abb6febba030bf0e3b343aaa4d /drivers/thermal/tango_thermal.c
parente3da1cbed64a19babe91775e21fcd8887039e711 (diff)
downloadlinux-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.c19
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,
},
};