2  * hwmon-vid.c - VID/VRM/VRD voltage conversions
6  * Partly imported from i2c-vid.h of the lm_sensors project
29 #include <linux/hwmon-vid.h>
32  * Common code for decoding VID pins.
44  * Table 74. VID Code Voltages
46  * These CPU models (K8 revision <= E) have 5 VID pins. See also:
52  * Table 71. VID Code Voltages
54  * These CPU models (K8 revision >= F) have 6 VID pins. See also:
78  * val is the 4-bit or more VID code.
80  * Some VID have some bits in uV scale, this is rounded to mV.
84 	int vid;  in vid_from_reg()  local
94 			vid = 1087500 - (val & 0x1f) * 25000;  in vid_from_reg()
96 			vid = 1862500 - (val & 0x1f) * 25000;  in vid_from_reg()
98 			vid -= 12500;  in vid_from_reg()
99 		return (vid + 500) / 1000;  in vid_from_reg()
118 	case 26:		/* AMD family 10h to 15h, serial VID */  in vid_from_reg()
196 	 * In theory, all NPT family 0Fh processors have 6 VID pins and should
198 	 * 6th VID pin because it is never needed. So we use the 5 VID pin
241  * VID tables, so we have to figure out first, which one must be
243  * 7-bit VID), 13 (Pentium M 6-bit VID) or 131 (Pentium M 6-bit VID
249 	unsigned int vid, brand, __maybe_unused dummy;  in get_via_model_d_vrm()  local
254 	rdmsr(0x198, dummy, vid);  in get_via_model_d_vrm()
255 	vid &= 0xff;  in get_via_model_d_vrm()
260 	if (vid > 0x3f) {  in get_via_model_d_vrm()
261 		pr_info("Using %d-bit VID table for VIA %s CPU\n",  in get_via_model_d_vrm()
265 		pr_info("Using %d-bit VID table for VIA %s CPU\n",  in get_via_model_d_vrm()
294 		return 0;	/* doesn't have VID */  in vid_which_vrm()
316 MODULE_DESCRIPTION("hwmon-vid driver");