diff options
Diffstat (limited to 'include/linux/hwmon-vid.h')
| -rw-r--r-- | include/linux/hwmon-vid.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/linux/hwmon-vid.h b/include/linux/hwmon-vid.h new file mode 100644 index 000000000..9409e1d20 --- /dev/null +++ b/include/linux/hwmon-vid.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + hwmon-vid.h - VID/VRM/VRD voltage conversions + + Originally part of lm_sensors + Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> + With assistance from Trent Piepho <xyzzy@speakeasy.org> + +*/ + +#ifndef _LINUX_HWMON_VID_H +#define _LINUX_HWMON_VID_H + +int vid_from_reg(int val, u8 vrm); +u8 vid_which_vrm(void); + +/* vrm is the VRM/VRD document version multiplied by 10. + val is in mV to avoid floating point in the kernel. + Returned value is the 4-, 5- or 6-bit VID code. + Note that only VRM 9.x is supported for now. */ +static inline int vid_to_reg(int val, u8 vrm) +{ + switch (vrm) { + case 91: /* VRM 9.1 */ + case 90: /* VRM 9.0 */ + return ((val >= 1100) && (val <= 1850) ? + ((18499 - val * 10) / 25 + 5) / 10 : -1); + default: + return -EINVAL; + } +} + +#endif /* _LINUX_HWMON_VID_H */ |