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D16855.diff

Index: head/sys/dev/amdtemp/amdtemp.c
===================================================================
--- head/sys/dev/amdtemp/amdtemp.c
+++ head/sys/dev/amdtemp/amdtemp.c
@@ -115,8 +115,15 @@
/*
* Reported Temperature, Family 17h
+ *
+ * According to AMD OSRR for 17H, section 4.2.1, bits 31-21 of this register
+ * provide the current temp. bit 19, when clear, means the temp is reported in
+ * a range 0.."225C" (probable typo for 255C), and when set changes the range
+ * to -49..206C.
*/
-#define AMDTEMP_17H_CUR_TMP 0x59800
+#define AMDTEMP_17H_CUR_TMP 0x59800
+#define AMDTEMP_17H_CUR_TMP_RANGE_SEL (1 << 19)
+#define AMDTEMP_17H_CUR_TMP_RANGE_OFF 490
/*
* Thermaltrip Status Register (Family 0Fh only)
@@ -595,13 +602,15 @@
amdtemp_gettemp17h(device_t dev, amdsensor_t sensor)
{
struct amdtemp_softc *sc = device_get_softc(dev);
- uint32_t temp;
+ uint32_t temp, val;
int error;
- error = amdsmn_read(sc->sc_smn, AMDTEMP_17H_CUR_TMP, &temp);
+ error = amdsmn_read(sc->sc_smn, AMDTEMP_17H_CUR_TMP, &val);
KASSERT(error == 0, ("amdsmn_read"));
- temp = ((temp >> 21) & 0x7ff) * 5 / 4;
+ temp = ((val >> 21) & 0x7ff) * 5 / 4;
+ if ((val & AMDTEMP_17H_CUR_TMP_RANGE_SEL) != 0)
+ temp -= AMDTEMP_17H_CUR_TMP_RANGE_OFF;
temp += AMDTEMP_ZERO_C_TO_K + sc->sc_offset * 10;
return (temp);

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