diff options
| author | Alec Thilenius <athilenius@chromium.org> | 2017-12-18 14:36:46 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-01-03 16:54:31 -0800 |
| commit | 27f92a378aad37bac9f2de1a311f78012eac574b (patch) | |
| tree | 9acf1e0da797136fadb5a8b117fa1c3f29d890fc /driver/temp_sensor/sb_tsi.h | |
| parent | bb113312271f790639cf6c7fc1da04ecd71f647d (diff) | |
| download | chrome-ec-27f92a378aad37bac9f2de1a311f78012eac574b.tar.gz | |
Add SB-TSI temp sensor driver
This adds the driver for the SB-TSI temp sensor.
This is a sensor on the AMD AP SOC (Stoney Ridege FT2) that acts like an
8-pin temp sensor with an I2C interface.
BUG=b:69379715
BRANCH=None
TEST=Build
Change-Id: Iaafe6c7beb3e02e4e341617e8f117c03c0a882a2
Signed-off-by: Alec Thilenius <athilenius@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/833346
Commit-Ready: Alec Thilenius <athilenius@google.com>
Tested-by: Alec Thilenius <athilenius@google.com>
Reviewed-by: Edward Hill <ecgh@chromium.org>
Diffstat (limited to 'driver/temp_sensor/sb_tsi.h')
| -rw-r--r-- | driver/temp_sensor/sb_tsi.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/driver/temp_sensor/sb_tsi.h b/driver/temp_sensor/sb_tsi.h new file mode 100644 index 0000000000..3ae11c5dbd --- /dev/null +++ b/driver/temp_sensor/sb_tsi.h @@ -0,0 +1,46 @@ +/* Copyright 2016 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +/* + * SB-TSI: SB Temperature Sensor Interface. + * This is an I2C slave temp sensor on the AMD Stony Ridge FT4 SOC. + */ + +#ifndef __CROS_EC_SB_TSI_H +#define __CROS_EC_SB_TSI_H + +#define SB_TSI_I2C_ADDR 0x98 /* 7-bit address is 0x4C */ + +/* G781 register */ +#define SB_TSI_TEMP_H 0x01 +#define SB_TSI_STATUS 0x02 +#define SB_TSI_CONFIG_1 0x03 +#define SB_TSI_UPDATE_RATE 0x04 +#define SB_TSI_HIGH_TEMP_THRESHOLD_H 0x07 +#define SB_TSI_LOW_TEMP_THRESHOLD_H 0x08 +#define SB_TSI_CONFIG_2 0x09 +#define SB_TSI_TEMP_L 0x10 +#define SB_TSI_TEMP_OFFSET_H 0x11 +#define SB_TSI_TEMP_OFFSET_L 0x12 +#define SB_TSI_HIGH_TEMP_THRESHOLD_L 0x13 +#define SB_TSI_LOW_TEMP_THRESHOLD_L 0x14 +#define SB_TSI_TIMEOUT_CONFIG 0x22 +#define SB_TSI_PSTATE_LIMIT_CONFIG 0x2F +#define SB_TSI_ALERT_THRESHOLD 0x32 +#define SB_TSI_ALERT_CONFIG 0xBF +#define SB_TSI_MANUFACTURE_ID 0xFE +#define SB_TSI_REVISION 0xFF + +/** + * Get the value of a sensor in K. + * + * @param idx Index to read. Only 0 is valid for sb_tsi. + * @param temp_ptr Destination for temperature in K. + * + * @return EC_SUCCESS if successful, non-zero if error. + */ +int sb_tsi_get_val(int idx, int *temp_ptr); + +#endif /* __CROS_EC_SB_TSI_H */ |