[PATCH V11 2/6] thermal: of-thermal: Implement signed coefficient support

From: Stefan Wahren <stefan.wahren-eS4NqCHxEME@public.gmane.org>
To: Eduardo Valentin
	<edubezval-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Zhang Rui <rui.zhang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	kernel-TqfNSX0MhmxHKSADF0wUEw@public.gmane.org
Cc: Eric Anholt <eric-WhKQ6XTQaPysTnJN9+BGXg@public.gmane.org>,
	Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Frank Rowand
	<frowand.list-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Florian Fainelli
	<f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	linux-rpi-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Stefan Wahren <stefan.wahren-eS4NqCHxEME@public.gmane.org>
Subject: [PATCH V11 2/6] thermal: of-thermal: Implement signed coefficient support
Date: Sun, 12 Mar 2017 22:11:01 +0000	[thread overview]
Message-ID: <1489356665-3175-3-git-send-email-stefan.wahren@i2se.com> (raw)
In-Reply-To: <1489356665-3175-1-git-send-email-stefan.wahren-eS4NqCHxEME@public.gmane.org>

Use the new function of_property_read_s32_array() to prepare
of-thermal for negative coefficients. These are used by
the upcoming bcm2835_thermal driver.

Signed-off-by: Stefan Wahren <stefan.wahren-eS4NqCHxEME@public.gmane.org>
---
 drivers/thermal/of-thermal.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
index d04ec3b..491d58a 100644
--- a/drivers/thermal/of-thermal.c
+++ b/drivers/thermal/of-thermal.c
@@ -821,7 +821,8 @@ __init *thermal_of_build_thermal_zone(struct device_node *np)
 	struct device_node *child = NULL, *gchild;
 	struct __thermal_zone *tz;
 	int ret, i;
-	u32 prop, coef[2];
+	u32 prop;
+	s32 coef[2];
 
 	if (!np) {
 		pr_err("no thermal zone np\n");
@@ -851,7 +852,7 @@ __init *thermal_of_build_thermal_zone(struct device_node *np)
 	 * one sensor per thermal zone. Thus, we are considering
 	 * only the first two values as slope and offset.
 	 */
-	ret = of_property_read_u32_array(np, "coefficients", coef, 2);
+	ret = of_property_read_s32_array(np, "coefficients", coef, 2);
 	if (ret == 0) {
 		tz->slope = coef[0];
 		tz->offset = coef[1];
-- 
1.7.9.5

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