[U-Boot] [PATCH 10/18] imx: ventana: gsc: fix negative temperature readings

[Tim Harvey]

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

Signed-off-by: Tim Harvey <tharvey at gateworks.com>
---
 board/gateworks/gw_ventana/gsc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/board/gateworks/gw_ventana/gsc.c b/board/gateworks/gw_ventana/gsc.c
index 2555824..c626ba2 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
-- 
1.9.1