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/* Copyright 2022 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Battery pack vendor provided charging profile
*/
#include "battery_fuel_gauge.h"
#include "cbi.h"
#include "common.h"
#include "compile_time_macros.h"
#include "gpio.h"
/*
* Battery info for all Brya battery types. Note that the fields
* start_charging_min/max and charging_min/max are not used for the charger.
* The effective temperature limits are given by discharging_min/max_c.
*
* Fuel Gauge (FG) parameters which are used for determining if the battery
* is connected, the appropriate ship mode (battery cutoff) command, and the
* charge/discharge FETs status.
*
* Ship mode (battery cutoff) requires 2 writes to the appropriate smart battery
* register. For some batteries, the charge/discharge FET bits are set when
* charging/discharging is active, in other types, these bits set mean that
* charging/discharging is disabled. Therefore, in addition to the mask for
* these bits, a disconnect value must be specified. Note that for TI fuel
* gauge, the charge/discharge FET status is found in Operation Status (0x54),
* but a read of Manufacturer Access (0x00) will return the lower 16 bits of
* Operation status which contains the FET status bits.
*
* The assumption for battery types supported is that the charge/discharge FET
* status can be read with a sb_read() command and therefore, only the register
* address, mask, and disconnect value need to be provided.
*/
const struct board_batt_params board_battery_info[] = {
/* C490-42 Battery Information */
[BATTERY_C490] = {
.fuel_gauge = {
.manuf_name = "AS3GWQd3jB",
.device_name = "C490-42",
.ship_mode = {
.reg_addr = 0x00,
.reg_data = { 0x0010, 0x0010 },
},
.fet = {
.reg_addr = 0x99,
.reg_mask = 0x000c,
.disconnect_val = 0x000c,
}
},
.batt_info = {
.voltage_max = 13200, /* mV */
.voltage_normal = 11880, /* mV */
.voltage_min = 9000, /* mV */
.precharge_current = 256, /* mA */
.start_charging_min_c = 0,
.start_charging_max_c = 45,
.charging_min_c = 0,
.charging_max_c = 60,
.discharging_min_c = -20,
.discharging_max_c = 60,
},
},
};
BUILD_ASSERT(ARRAY_SIZE(board_battery_info) == BATTERY_TYPE_COUNT);
const enum battery_type DEFAULT_BATTERY_TYPE = BATTERY_C490;
enum battery_present battery_hw_present(void)
{
enum gpio_signal batt_pres;
batt_pres = GPIO_EC_BATT_PRES_ODL;
/* The GPIO is low when the battery is physically present */
return gpio_get_level(batt_pres) ? BP_NO : BP_YES;
}
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