Add BQ27541 battery driver

BQ27541 is not a smart battery IC, and thus we cannot use existing smart
battery driver. Let's add a driver that implements a smart-battery-like
interface.

The 'battery' console command is also moved to battery.c so that it can
be reused by different battery driver.

BUG=chrome-os-partner:22048
TEST=Type 'battery' and check the reported values are sane.
TEST=Check 'battery' command works fine on Spring.
BRANCH=None

Change-Id: I5d1eaeb3f801478f3b9473fd43c1f2a2eda75859
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/66340

1 files changed, 99 insertions, 0 deletions

diff --git a/include/battery.h b/include/battery.h
index 940187fe7f..39a7aea0d1 100644
--- a/include/battery.h
+++ b/include/battery.h
@@ -31,5 +31,104 @@
  */
 #define BATTERY_LEVEL_SHUTDOWN		  3
 
+
+/* Get/set battery mode */
+int battery_get_battery_mode(int *mode);
+
+int battery_set_battery_mode(int mode);
+
+/* Read battery temperature
+ * unit: 0.1 K
+ */
+int battery_temperature(int *deci_kelvin);
+
+/* Read battery voltage
+ * unit: mV
+ */
+int battery_voltage(int *voltage);
+
+/* Relative state of charge in percent */
+int battery_state_of_charge(int *percent);
+
+/* Absolute state of charge in percent */
+int battery_state_of_charge_abs(int *percent);
+
+/*
+ * Return non-zero if the battery is reporting capacity in 10mW.
+ * Otherwise, in mAh. */
+int battery_is_in_10mw_mode(void);
+
+/*
+ * Battery remaining capacity
+ * unit: mAh or 10mW, depends on battery mode
+ */
+int battery_remaining_capacity(int *capacity);
+
+/* Battery full charge capacity */
+int battery_full_charge_capacity(int *capacity);
+
+/* Time in minutes left when discharging */
+int battery_time_to_empty(int *minutes);
+
+int battery_run_time_to_empty(int *minutes);
+
+/* Time in minutes to full when charging */
+int battery_time_to_full(int *minutes);
+
+/* The current battery desired to charge
+ * unit: mA
+ */
+int battery_desired_current(int *current);
+
+/* The voltage battery desired to charge
+ * unit: mV
+ */
+int battery_desired_voltage(int *voltage);
+
+/* Read battery status */
+int battery_status(int *status);
+
+/* Battery charge cycle count */
+int battery_cycle_count(int *count);
+
+/* Designed battery capacity
+ * unit: mAh or 10mW depends on battery mode
+ */
+int battery_design_capacity(int *capacity);
+
+/* Designed battery output voltage
+ * unit: mV
+ */
+int battery_design_voltage(int *voltage);
+
+/* Read serial number */
+int battery_serial_number(int *serial);
+
+/* Read manufacturer name */
+int battery_manufacturer_name(char *manufacturer_name, int buf_size);
+
+/* Read device name */
+int battery_device_name(char *device_name, int buf_size);
+
+/* Read battery type/chemistry */
+int battery_device_chemistry(char *device_chemistry, int buf_size);
+
+/* Read battery discharging current
+ * unit: mA
+ * negative value: charging
+ */
+int battery_current(int *current);
+int battery_average_current(int *current);
+
+/* Calculate battery time in minutes, under a charging rate
+ * rate >  0: charging, negative time to full
+ * rate <  0: discharging, positive time to empty
+ * rate == 0: invalid input, time = 0
+ */
+int battery_time_at_rate(int rate, int *minutes);
+
+/* Read manufacturer date */
+int battery_manufacturer_date(int *year, int *month, int *day);
+
 #endif /* __CROS_EC_BATTERY_H */