mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
674d0ed858
vid_to_reg() returns -1 if it encounters an error. Return -EINVAL instead. Its only caller, atxp1_storevcore(), doesn't use the return code but returns -1 instead, which is wrong anyway as it means -EPERM. Use the return value from vid_to_reg() instead to report the error. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Jean Delvare <khali@linux-fr.org>
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/*
|
|
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>
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#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 */
|