2f8ba69b0e
`.read_resources` and `.set_resources` are the only two device operations that are considered mandatory. Other function pointers can be left NULL. Having dedicated no-op implementations for the two mandatory fields should stop the leaking of no-op pointers to other fields. Change-Id: I6469a7568dc24317c95e238749d878e798b0a362 Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/40207 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr> Reviewed-by: Edward O'Callaghan <quasisec@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <device/device.h>
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#include <console/console.h>
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#include <device/smbus.h>
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/**
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* Do some S2881-specific HWM initialization for the ADT7463 chip.
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*
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* Should be factored out so that it can be more general.
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*
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* See Analog Devices ADT7463 datasheet, Rev C (2004):
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* http://www.analog.com/en/prod/0,,766_825_ADT7463,00.html
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*/
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static void adt7463_init(struct device *adt7463)
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{
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int result;
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printk(BIOS_DEBUG, "ADT7463 is %s\n", dev_path(adt7463));
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/* Set all fans to 'Fastest Speed Calculated by All 3 Temperature
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* Channels Controls PWMx'.
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*/
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result = smbus_write_byte(adt7463, 0x5c, 0xc2);
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result = smbus_write_byte(adt7463, 0x5d, 0xc2);
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result = smbus_write_byte(adt7463, 0x5e, 0xc2);
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/* Make sure that our fans never stop when temp. falls below Tmin,
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* but rather keep going at minimum duty cycle (applies to automatic
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* fan control mode only).
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*/
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result = smbus_write_byte(adt7463, 0x62, 0xc0);
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/* Set minimum PWM duty cycle to 25%, rather than the default 50%. */
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result = smbus_write_byte(adt7463, 0x64, 0x40);
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result = smbus_write_byte(adt7463, 0x65, 0x40);
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result = smbus_write_byte(adt7463, 0x66, 0x40);
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/* Set Tmin to 55C, rather than the default 90C. Above this temperature
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* the fans will start blowing harder as temperature increases
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* (automatic mode only).
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*/
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result = smbus_write_byte(adt7463, 0x67, 0x37);
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result = smbus_write_byte(adt7463, 0x68, 0x37);
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result = smbus_write_byte(adt7463, 0x69, 0x37);
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/* Set THERM limit to 70C, rather than the default 100C.
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* The fans will kick in at 100% if the sensors reach this temperature,
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* (only in automatic mode, but supposedly even when hardware is
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* locked up). This is a failsafe measure.
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*/
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result = smbus_write_byte(adt7463, 0x6a, 0x46);
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result = smbus_write_byte(adt7463, 0x6b, 0x46);
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result = smbus_write_byte(adt7463, 0x6c, 0x46);
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/* Remote temperature 1 offset (LSB == 0.25C). */
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result = smbus_write_byte(adt7463, 0x70, 0x02);
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/* Remote temperature 2 offset (LSB == 0.25C). */
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result = smbus_write_byte(adt7463, 0x72, 0x01);
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/* Set TACH measurements to normal (1/second). */
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result = smbus_write_byte(adt7463, 0x78, 0xf0);
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printk(BIOS_DEBUG, "ADT7463 properly initialized\n");
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}
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static struct device_operations adt7463_operations = {
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.read_resources = noop_read_resources,
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.set_resources = noop_set_resources,
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.init = adt7463_init,
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};
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static void enable_dev(struct device *dev)
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{
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dev->ops = &adt7463_operations;
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}
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struct chip_operations drivers_i2c_adt7463_ops = {
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CHIP_NAME("adt7463")
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.enable_dev = enable_dev,
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};
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