[V10,2/6] thermal: of-thermal: Implement signed coefficient support

Commit Message

Stefan Wahren March 3, 2017, 11:18 p.m. UTC

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 <[e-mail]>
---
 drivers/thermal/of-thermal.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Patch

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];