From: "Niklas Söderlund" <niklas.soderlund+renesas@ragnatech.se>
To: linux-pm@vger.kernel.org,
Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: linux-renesas-soc@vger.kernel.org,
"Niklas Söderlund" <niklas.soderlund+renesas@ragnatech.se>
Subject: [PATCH v2 1/2] thermal: rcar_thermal: Remove temperature bound
Date: Fri, 17 Jan 2020 16:22:41 +0100 [thread overview]
Message-ID: <20200117152242.3804288-2-niklas.soderlund+renesas@ragnatech.se> (raw)
In-Reply-To: <20200117152242.3804288-1-niklas.soderlund+renesas@ragnatech.se>
The hardware manual states that the operation of the sensor is not
guaranteed outside the range of -45°C to 125°C, not that the readings
are invalid. Remove the bound check and try to deliver temperature
readings even if we are outside the guaranteed operation range.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
* Changes since v2
- Preserver the guaranteed operating range in a comment.
---
drivers/thermal/rcar_thermal.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c
index d0873de718da9218..f9c1fa10e6a2b3fd 100644
--- a/drivers/thermal/rcar_thermal.c
+++ b/drivers/thermal/rcar_thermal.c
@@ -275,12 +275,7 @@ static int rcar_thermal_get_current_temp(struct rcar_thermal_priv *priv,
tmp = MCELSIUS((priv->ctemp * 5) - 60);
mutex_unlock(&priv->lock);
- if ((tmp < MCELSIUS(-45)) || (tmp > MCELSIUS(125))) {
- struct device *dev = rcar_priv_to_dev(priv);
-
- dev_err(dev, "it couldn't measure temperature correctly\n");
- return -EIO;
- }
+ /* Guaranteed operating ragne is -45C to 125C. */
*temp = tmp;
--
2.24.1
next prev parent reply other threads:[~2020-01-17 15:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-17 15:22 [PATCH v2 0/2] thermal: rcar_{gen3_}thermal: Remove temperature Niklas Söderlund
2020-01-17 15:22 ` Niklas Söderlund [this message]
2020-01-17 16:05 ` [PATCH v2 1/2] thermal: rcar_thermal: Remove temperature bound Niklas Söderlund
2020-01-17 15:22 ` [PATCH v2 2/2] thermal: rcar_gen3_thermal: " Niklas Söderlund
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