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authorjmcneill <jmcneill@NetBSD.org>2014-11-21 22:31:09 +0000
committerjmcneill <jmcneill@NetBSD.org>2014-11-21 22:31:09 +0000
commitb89a6c8647a72a6216e0d0e9620bf5bea1b7ecda (patch)
tree17cb399c9584118674704167338286040e5375de /sys/dev
parentc7df815efb4b8c20b83c4c30d54ae225d3c64ad4 (diff)
Change internal temperature base from -267.7C to -243.7C. The AXP223
datasheet says that the value is between -267.7C and 165.8C in steps of 0.1C, but this doesn't make sense for a 12-bit field. If we take the maximum value and subtract 4095 we get -243.7C, effectively adding +24C to the reported temp. On my A31 board, this changes a chilly 15.3C to a more reasonable 39.3C.
Diffstat (limited to 'sys/dev')
-rw-r--r--sys/dev/i2c/axp22x.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/sys/dev/i2c/axp22x.c b/sys/dev/i2c/axp22x.c
index 6b3c21ee951..e2038fe2e08 100644
--- a/sys/dev/i2c/axp22x.c
+++ b/sys/dev/i2c/axp22x.c
@@ -1,4 +1,4 @@
-/* $NetBSD: axp22x.c,v 1.1 2014/10/12 23:58:42 jmcneill Exp $ */
+/* $NetBSD: axp22x.c,v 1.2 2014/11/21 22:31:09 jmcneill Exp $ */
/*-
* Copyright (c) 2014 Jared D. McNeill <jmcneill@invisible.ca>
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: axp22x.c,v 1.1 2014/10/12 23:58:42 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: axp22x.c,v 1.2 2014/11/21 22:31:09 jmcneill Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -108,8 +108,8 @@ axp22x_sensors_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
if (error) {
edata->state = ENVSYS_SINVALID;
} else {
- /* between -267.7C and 165.8C, step +0.1C */
- edata->value_cur = (((buf[0] << 4) | (buf[1] & 0xf)) - 2677)
+ /* between -243.7C and 165.8C, step +0.1C */
+ edata->value_cur = (((buf[0] << 4) | (buf[1] & 0xf)) - 2437)
* 100000 + 273150000;
edata->state = ENVSYS_SVALID;
}