diff options
| author | Vic Yang <victoryang@chromium.org> | 2014-09-09 23:00:33 -0700 |
|---|---|---|
| committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2014-09-17 01:24:11 +0000 |
| commit | d86f672d145e31d587a26f9e15ea7df8a81c159f (patch) | |
| tree | 59a50e6e8a7a88255358718a73f73ea50f1cfd63 /driver | |
| parent | 5bc3dc3bbe8f062b39065678638b820de330dee2 (diff) | |
| download | chrome-ec-d86f672d145e31d587a26f9e15ea7df8a81c159f.tar.gz | |
Add support for BQ27742 battery gauge chip
This reuses most of the existing BQ27541 driver, but changed necessary
parts to make it work.
BUG=none
TEST=Boot on Ryu. See battery charging.
BRANCH=factory-ryu-6212.B
Change-Id: I3a7325a821c81f84396bcc328036b6a5e7749a2e
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/217198
Reviewed-by: Alec Berg <alecaberg@chromium.org>
(cherry picked from commit f44593e20bf61a2243d7baaae901c912ca798d75)
Reviewed-on: https://chromium-review.googlesource.com/218413
Diffstat (limited to 'driver')
| -rw-r--r-- | driver/battery/bq27541.c | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/driver/battery/bq27541.c b/driver/battery/bq27541.c index dfa5fe01ba..11578037cc 100644 --- a/driver/battery/bq27541.c +++ b/driver/battery/bq27541.c @@ -2,17 +2,20 @@ * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. * - * Battery driver for BQ27541. + * Battery driver for BQ27541/BQ27741/BQ27742. */ #include "battery.h" #include "console.h" #include "extpower.h" +#include "hooks.h" #include "i2c.h" #include "util.h" #define BQ27541_ADDR 0xaa #define BQ27541_TYPE_ID 0x0541 +#define BQ27741_TYPE_ID 0x0741 +#define BQ27742_TYPE_ID 0x0742 #define REG_CTRL 0x00 #define REG_AT_RATE 0x02 @@ -42,6 +45,8 @@ #define REG_DEVICE_NAME 0x63 #define REG_PROTECTOR 0x6d +static int battery_type_id; + static int bq27541_read(int offset, int *data) { return i2c_read16(I2C_PORT_BATTERY, BQ27541_ADDR, offset, data); @@ -60,16 +65,25 @@ static int bq27541_write(int offset, int data) int bq27541_probe(void) { int rv; - int dev_type; rv = bq27541_write(REG_CTRL, 0x1); - rv |= bq27541_read(REG_CTRL, &dev_type); + rv |= bq27541_read(REG_CTRL, &battery_type_id); if (rv) return rv; - return (dev_type == BQ27541_TYPE_ID) ? EC_SUCCESS : EC_ERROR_UNKNOWN; + if (battery_type_id == BQ27541_TYPE_ID || + battery_type_id == BQ27741_TYPE_ID || + battery_type_id == BQ27742_TYPE_ID) + return EC_SUCCESS; + return EC_ERROR_UNKNOWN; } +static void probe_type_id(void) +{ + bq27541_probe(); +} +DECLARE_HOOK(HOOK_INIT, probe_type_id, HOOK_PRIO_DEFAULT); + int battery_device_name(char *device_name, int buf_size) { int rv, i, val; @@ -175,7 +189,12 @@ static int battery_charging_allowed(int *allowed) rv = bq27541_read(REG_FLAGS, &val); if (rv) return rv; - *allowed = (val & 0x100); + if (battery_type_id == BQ27541_TYPE_ID || + battery_type_id == BQ27741_TYPE_ID) + *allowed = (val & 0x100); + else /* BQ27742_TYPE_ID */ + *allowed = (val & 0x8); + return EC_SUCCESS; } |