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| author | Caveh Jalali <caveh@chromium.org> | 2021-09-21 16:27:52 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-10-01 22:24:59 +0000 |
| commit | 4d5a9a823e3eef6d624b326cbbafebc698d71cdc (patch) | |
| tree | 1a4eec2c902e5bb6effb4168372a663c06bf882d | |
| parent | 066a846f76f8fd03408de6fd86e1d8270d4a1475 (diff) | |
| download | chrome-ec-4d5a9a823e3eef6d624b326cbbafebc698d71cdc.tar.gz | |
hostcmd: Define I2C speed control interface
This defines an host command to get or set the I2C bus speed of an I2C
bus located on the EC.
BRANCH=none
BUG=b:201039003
TEST=with follow-on patches, switched I2C bus speed between 400 kHz
and 1 MHz using ectool.
Cq-Depend: chromium:3181506
Change-Id: I57889ebf40bcec397b6f9a52822bb5479702e9e4
Signed-off-by: Caveh Jalali <caveh@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3181505
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-by: Boris Mittelberg <bmbm@google.com>
| -rw-r--r-- | include/ec_commands.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/ec_commands.h b/include/ec_commands.h index d866f90918..e317c29e28 100644 --- a/include/ec_commands.h +++ b/include/ec_commands.h @@ -7010,6 +7010,31 @@ enum ec_set_base_state_cmd { EC_SET_BASE_STATE_RESET, }; +#define EC_CMD_I2C_CONTROL 0x0139 + +/* Subcommands for I2C control */ + +enum ec_i2c_control_command { + EC_I2C_CONTROL_GET_SPEED, + EC_I2C_CONTROL_SET_SPEED, +}; + +#define EC_I2C_CONTROL_SPEED_UNKNOWN 0 + +struct ec_params_i2c_control { + uint8_t port; /* I2C port number */ + uint8_t cmd; /* enum ec_i2c_control_command */ + union { + uint16_t speed_khz; + } cmd_params; +} __ec_align_size1; + +struct ec_response_i2c_control { + union { + uint16_t speed_khz; + } cmd_response; +} __ec_align_size1; + /*****************************************************************************/ /* The command range 0x200-0x2FF is reserved for Rotor. */ |