diff options
Diffstat (limited to 'board/marasov/battery.c')
-rw-r--r-- | board/marasov/battery.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/board/marasov/battery.c b/board/marasov/battery.c new file mode 100644 index 0000000000..b974930d5b --- /dev/null +++ b/board/marasov/battery.c @@ -0,0 +1,77 @@ +/* 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; +} |