From: Tim Harvey <tharvey@gateworks.com>
Date: Tue, 24 May 2016 18:03:51 +0000 (-0700)
Subject: imx: ventana: gsc: fix negative temperature readings
X-Git-Tag: v2016.07-rc2~49^2~19
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=82a17e75da0d812c2e583e733efd1e67e7488933;p=u-boot

imx: ventana: gsc: fix negative temperature readings

The GSC Temperature sensor is a 2's complement value - adjust accordingly
for negative temperatures.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
---

diff --git a/board/gateworks/gw_ventana/gsc.c b/board/gateworks/gw_ventana/gsc.c
index 2555824259..c626ba25e7 100644
--- a/board/gateworks/gw_ventana/gsc.c
+++ b/board/gateworks/gw_ventana/gsc.c
@@ -71,6 +71,8 @@ static void read_hwmon(const char *name, uint reg, uint size)
 		puts("fRD\n");
 	} else {
 		ui = buf[0] | (buf[1]<<8) | (buf[2]<<16);
+		if (reg == GSC_HWMON_TEMP && ui > 0x8000)
+			ui -= 0xffff;
 		if (ui == 0xffffff)
 			puts("invalid\n");
 		else