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thermal: rcar_gen3_thermal: add suspend and resume support 

To restore operation it's easiest to reinitialise all TSCs. In order to
do this the current trip window needs to be stored in the TSC structure
so that it can be restored upon resume.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Niklas Söderlund 2017-03-29 20:43:56 +02:00 committed by Eduardo Valentin
parent cc4d072b66
commit 75f78d6d9e
1 changed files with 35 additions and 0 deletions
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35
drivers/thermal/rcar_gen3_thermal.c
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@ -82,6 +82,8 @@ struct rcar_gen3_thermal_tsc {
void __iomem *base;
struct thermal_zone_device *zone;
struct equation_coefs coef;
int low;
int high;
};
struct rcar_gen3_thermal_priv {
@ -217,6 +219,9 @@ static int rcar_gen3_thermal_set_trips(void *devdata, int low, int high)
rcar_gen3_thermal_write(tsc, REG_GEN3_IRQTEMP2,
rcar_gen3_thermal_mcelsius_to_temp(tsc, high));
tsc->low = low;
tsc->high = high;
return 0;
}
@ -454,9 +459,39 @@ error_unregister:
return ret;
}
static int __maybe_unused rcar_gen3_thermal_suspend(struct device *dev)
{
struct rcar_gen3_thermal_priv *priv = dev_get_drvdata(dev);
rcar_thermal_irq_set(priv, false);
return 0;
}
static int __maybe_unused rcar_gen3_thermal_resume(struct device *dev)
{
struct rcar_gen3_thermal_priv *priv = dev_get_drvdata(dev);
unsigned int i;
for (i = 0; i < priv->num_tscs; i++) {
struct rcar_gen3_thermal_tsc *tsc = priv->tscs[i];
priv->data->thermal_init(tsc);
rcar_gen3_thermal_set_trips(tsc, tsc->low, tsc->high);
}
rcar_thermal_irq_set(priv, true);
return 0;
}
static SIMPLE_DEV_PM_OPS(rcar_gen3_thermal_pm_ops, rcar_gen3_thermal_suspend,
rcar_gen3_thermal_resume);
static struct platform_driver rcar_gen3_thermal_driver = {
.driver = {
.name = "rcar_gen3_thermal",
.pm = &rcar_gen3_thermal_pm_ops,
.of_match_table = rcar_gen3_thermal_dt_ids,
},
.probe = rcar_gen3_thermal_probe,