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5c808ee56c
This enables the AP to limit charging current via ACPI.
BUG=chrome-os-partner:23971
BRANCH=rambi
TEST=manual
drain battery down to <90%, then plug into AC
(charger commands at EC console, iotools at root shell)
iotools io_write8 0x66 0x81
iotools io_write8 0x62 0x08
iotools io_write8 0x62 3
charger -> dptf limit 192, I_batt=192
charger dptf 320
charger -> dptf limit 320, I_batt=320
iotools io_write8 0x66 0x80
iotools io_write8 0x62 0x08
iotools io_read8 0x62 -> 0x05
iotools io_write8 0x66 0x81
iotools io_write8 0x62 0x08
iotools io_write8 0x62 0xff
charger -> dptf disabled, I_batt=(something > 192)
iotools io_write8 0x66 0x80
iotools io_write8 0x62 0x08
iotools io_read8 0x62 -> 0xff
Change-Id: Iace2ebbbc018143c0154310d7acd02d16a6b7339
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/185411
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Functions used to provide the Intel DPTF interface over ACPI */
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#ifndef __CROS_EC_DPTF_H
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#define __CROS_EC_DPTF_H
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/**
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* Set fan duty target.
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*
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* 0-100% sets fixed duty cycle, out of range means let the EC drive.
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*/
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void dptf_set_fan_duty_target(int pct);
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/**
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* Return 0-100% if in duty mode. -1 if not.
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*/
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int dptf_get_fan_duty_target(void);
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/* Thermal thresholds may be set for each temp sensor. */
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#define DPTF_THRESHOLDS_PER_SENSOR 2
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#define DPTF_THRESHOLD_HYSTERESIS 2
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/**
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* Set/enable the thresholds.
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*/
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void dptf_set_temp_threshold(int sensor_id, /* zero-based sensor index */
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int temp, /* in degrees K */
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int idx, /* which threshold (0 or 1) */
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int enable); /* true = on, false = off */
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/**
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* Return the ID of a temp sensor that has crossed its threshold since the last
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* time we asked. -1 means none.
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*/
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int dptf_query_next_sensor_event(void);
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/**
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* Set charging current limit, in mA. -1 means no limit.
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*/
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void dptf_set_charging_current_limit(int ma);
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/**
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* Get charging current limit, in mA, or -1 if not DPTF-limiting.
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*/
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int dptf_get_charging_current_limit(void);
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#endif /* __CROS_EC_DPTF_H */
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