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f66113247a
If battery is not present, input current is set to PD_MAX_CURRENT_MA.
If the input power set is greater than the maximum allowed system power,
system might get damaged. Hence, limit the input current to meet maximum
allowed input system power.
BUG=chrome-os-partner:58498
BRANCH=none
TEST=Manually tested on Reef. Removed the battery & using 'charger'
console command observed the following.
With Zinger charger at 20V - Input current is set to 2.25A
With Type-C & other chargers - Input current is set to 3A
Change-Id: Ife8686f322e095aa74b740a7c469bfe87107fb9a
Signed-off-by: Vijay Hiremath <vijay.p.hiremath@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/397865
Commit-Ready: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Tested-by: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Reviewed-by: Shawn N <shawnn@chromium.org>
96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
/* Copyright 2015 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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/* Charge input current limit ramp header for Chrome EC */
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#ifndef __CROS_EC_CHARGE_RAMP_H
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#define __CROS_EC_CHARGE_RAMP_H
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#include "timer.h"
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/* Charge ramp state used for checking VBUS */
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enum chg_ramp_vbus_state {
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CHG_RAMP_VBUS_RAMPING,
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CHG_RAMP_VBUS_STABLE
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};
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/**
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* Check if ramping is allowed for given supplier
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*
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* @supplier Supplier to check
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*
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* @return Ramping is allowed for given supplier
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*/
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int board_is_ramp_allowed(int supplier);
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/**
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* Get the maximum current limit that we are allowed to ramp to
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*
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* @supplier Active supplier type
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* @sup_curr Input current limit based on supplier
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*
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* @return Maximum current in mA
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*/
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int board_get_ramp_current_limit(int supplier, int sup_curr);
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/**
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* Check if board is consuming full input current
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*
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* @return Board is consuming full input current
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*/
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int board_is_consuming_full_charge(void);
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/**
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* Check if VBUS is too low
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*
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* @param ramp_state Current ramp state
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*
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* @return VBUS is sagging low
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*/
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int board_is_vbus_too_low(enum chg_ramp_vbus_state ramp_state);
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/**
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* Get the input current limit set by ramp module
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*
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* Active input current limit (mA)
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*/
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int chg_ramp_get_current_limit(void);
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/**
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* Return if charge ramping has reached stable state
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*
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* @return 1 if stable, 0 otherwise
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*/
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int chg_ramp_is_stable(void);
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/**
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* Return if charge ramping has reached detected state
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*
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* @return 1 if detected, 0 otherwise
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*/
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int chg_ramp_is_detected(void);
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#ifdef HAS_TASK_CHG_RAMP
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/**
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* Notify charge ramp module of supplier type change on a port. If port
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* is CHARGE_PORT_NONE, the call indicates the last charge supplier went
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* away.
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*
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* @port Active charging port
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* @supplier Active charging supplier
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* @current Minimum input current limit
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* @registration_time Timestamp of when the supplier is registered
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* @voltage Negotiated charge voltage.
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*/
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void chg_ramp_charge_supplier_change(int port, int supplier, int current,
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timestamp_t registration_time, int voltage);
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#else
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static inline void chg_ramp_charge_supplier_change(
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int port, int supplier, timestamp_t registration_time) { }
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#endif
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#endif /* __CROS_EC_CHARGE_RAMP_H */
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