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siemens/nc_fpga: Add support for lowest FAN speed to FAN controller 

The functionality of the FAN controller is extended to provide a
lowest startup speed of the FAN. Add the parameter "fanmin" to
the fan_ctrl_t structure and initialize the value.

Change-Id: Ib2e093ed6f5fc29bbea879779eb4777eb371b937
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/20789
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This commit is contained in:
Werner Zeh 2017-07-27 13:48:18 +02:00 committed by Martin Roth
parent 909536a666
commit c38ab85cd4
2 changed files with 5 additions and 3 deletions
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3
src/drivers/siemens/nc_fpga/nc_fpga.c
View File

@ -1,7 +1,7 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Siemens AG.
* Copyright (C) 2016-2017 Siemens AG.
*
* 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
@ -73,6 +73,7 @@ static void init_fan_ctrl (void *base_adr)
FPGA_SET_PARAM(FANKi, ctrl->ki);
FPGA_SET_PARAM(FANKd, ctrl->kd);
FPGA_SET_PARAM(FANMaxSpeed, ctrl->fanmax);
FPGA_SET_PARAM(FANStartSpeed, ctrl->fanmin);
/* Set freeze and FAN configuration. */
if ((hwilib_get_field(FF_FanReq, &fan_req, 1) == 1) &&
(hwilib_get_field(FF_FreezeDis, &freeze_disable, 1) == 1)) {

5
src/drivers/siemens/nc_fpga/nc_fpga.h
View File

@ -1,7 +1,7 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Siemens AG.
* Copyright (C) 2016-2017 Siemens AG.
*
* 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
@ -60,7 +60,8 @@ typedef struct {
uint16_t kp;
uint16_t ki;
uint16_t kd;
uint16_t res8[2];
uint16_t fanmin;
uint16_t res8;
uint16_t fanmax;
uint16_t hystval;
uint16_t hystthreshold;