diff options
| author | Daisuke Nojiri <dnojiri@chromium.org> | 2016-10-04 13:54:48 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-10-05 20:58:17 -0700 |
| commit | c0c66cdd12c79fc0d11a505b12b25fc8c1860dfd (patch) | |
| tree | df1037f794409bc162c7a075f37521017f2eec19 /include/i2c.h | |
| parent | 9b57c61ff7525b2ec6e0ca855663319d7e480889 (diff) | |
| download | chrome-ec-c0c66cdd12c79fc0d11a505b12b25fc8c1860dfd.tar.gz | |
stm32l4: Add i2c driver
This patch adds master and slave drivers for stm32l4 family. Only slave
functionality is tested.
BUG=none
BRANCH=none
TEST=Run cts.py -m i2c. Make buildall.
Change-Id: Ied77081ca0333ab3fec055cd4f0fcbdf8a79d388
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/393329
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Diffstat (limited to 'include/i2c.h')
| -rw-r--r-- | include/i2c.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/i2c.h b/include/i2c.h index 3af738201b..ddb0508828 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -301,4 +301,21 @@ int i2c_port_to_controller(int port); */ int i2c_get_protocol_info(struct host_cmd_handler_args *args); +/** + * Callbacks processing received data and response + * + * i2c_data_recived will be called when a slave finishes receiving data and + * i2c_set_response will be called when a slave is expected to send response. + * + * Using these, Chrome OS host command protocol should be separated from + * i2c slave drivers (e.g. i2c-stm32f0.c, i2c-stm32f3.c). + * + * @param port: I2C port number + * @param buf: Buffer containing received data on call and response on return + * @param len: Size of received data + * @return Size of response data + */ +void i2c_data_received(int port, uint8_t *buf, int len); +int i2c_set_response(int port, uint8_t *buf, int len); + #endif /* __CROS_EC_I2C_H */ |