[RESEND PATCH v4] thermal: tango: add resume support
From: Marc Gonzalez <hidden>
Date: 2016-09-07 08:30:41
Also in:
linux-pm
Subsystem:
the rest, thermal · Maintainers:
Linus Torvalds, Rafael J. Wysocki, Daniel Lezcano
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. Reviewed-by: Kevin Hilman <khilman@baylibre.com> Signed-off-by: Marc Gonzalez <redacted> --- Add Kevin's Reviewed-by tag. Earlier versions of this patch were reviewed by Kevin and Thierry. The current form is preferred by Arnd. Rui, could you take this patch before the next merge window opens? --- drivers/thermal/tango_thermal.c | 19 +++++++++++++++++-- 1 file 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, }, };
--
2.9.0