From c4e1280abead1552e1764684079a43e222ccd163 Mon Sep 17 00:00:00 2001 From: Stefan Wahren Date: Tue, 12 Apr 2022 21:54:23 +0200 Subject: [PATCH] thermal/drivers/bcm2711: Don't clamp temperature at zero [ Upstream commit 106e0121e243de4da7d634338089a68a8da2abe9 ] The thermal sensor on BCM2711 is capable of negative temperatures, so don't clamp the measurements at zero. Since this was the only use for variable t, drop it. This change based on a patch by Dom Cobley, who also tested the fix. Fixes: 59b781352dc4 ("thermal: Add BCM2711 thermal driver") Signed-off-by: Stefan Wahren Acked-by: Florian Fainelli Link: https://lore.kernel.org/r/20220412195423.104511-1-stefan.wahren@i2se.com Signed-off-by: Daniel Lezcano Signed-off-by: Sasha Levin --- drivers/thermal/broadcom/bcm2711_thermal.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/thermal/broadcom/bcm2711_thermal.c b/drivers/thermal/broadcom/bcm2711_thermal.c index 1ec57d9ecf539..e9bef5c3414b6 100644 --- a/drivers/thermal/broadcom/bcm2711_thermal.c +++ b/drivers/thermal/broadcom/bcm2711_thermal.c @@ -38,7 +38,6 @@ static int bcm2711_get_temp(void *data, int *temp) int offset = thermal_zone_get_offset(priv->thermal); u32 val; int ret; - long t; ret = regmap_read(priv->regmap, AVS_RO_TEMP_STATUS, &val); if (ret) @@ -50,9 +49,7 @@ static int bcm2711_get_temp(void *data, int *temp) val &= AVS_RO_TEMP_STATUS_DATA_MSK; /* Convert a HW code to a temperature reading (millidegree celsius) */ - t = slope * val + offset; - - *temp = t < 0 ? 0 : t; + *temp = slope * val + offset; return 0; }