This patch adds support for Intel VRD 10.0 and AMD Opteron VID calculations.
It is based on the lm_sensors project CVS, r1.6.
Signed-off-by: Mark M. Hoffman <mhoffman at lightlink.com>
Index: linux-2.6.9-rc2/include/linux/i2c-vid.h
===================================================================
--- linux-2.6.9-rc2.orig/include/linux/i2c-vid.h 2004-09-15 22:45:16.094005498 -0400
+++ linux-2.6.9-rc2/include/linux/i2c-vid.h 2004-09-15 22:50:25.870720679 -0400
@@ -29,7 +29,22 @@
*/
/*
- Legal val values 00 - 1F.
+ AMD Opteron processors don't follow the Intel VRM spec.
+ I'm going to "make up" 2.4 as the VRM spec for the Opterons.
+ No good reason just a mnemonic for the 24x Opteron processor
+ series
+
+ Opteron VID encoding is:
+
+ 00000 = 1.550 V
+ 00001 = 1.525 V
+ . . . .
+ 11110 = 0.800 V
+ 11111 = 0.000 V (off)
+ */
+
+/*
+ Legal val values 0x00 - 0x1f; except for VRD 10.0, 0x00 - 0x3f.
vrm is the Intel VRM document version.
Note: vrm version is scaled by 10 and the return value is scaled by 1000
to avoid floating point in the kernel.
@@ -41,9 +56,28 @@ int i2c_which_vrm(void);
static inline int vid_from_reg(int val, int vrm)
{
+ int vid;
+
switch(vrm) {
+
case 0:
return 0;
+
+ case 100: /* VRD 10.0 */
+ if((val & 0x1f) == 0x1f)
+ return 0;
+ if((val & 0x1f) <= 0x09 || val == 0x0a)
+ vid = 10875 - (val & 0x1f) * 250;
+ else
+ vid = 18625 - (val & 0x1f) * 250;
+ if(val & 0x20)
+ vid -= 125;
+ vid /= 10; /* only return 3 dec. places for now */
+ return vid;
+
+ case 24: /* Opteron processor */
+ return(val == 0x1f ? 0 : 1550 - val * 25);
+
case 91: /* VRM 9.1 */
case 90: /* VRM 9.0 */
return(val == 0x1f ? 0 :
--
Mark M. Hoffman
mhoffman at lightlink.com
