diff options
| author | Wei-Ning Huang <wnhuang@google.com> | 2017-04-21 23:32:53 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2017-04-26 13:37:04 -0700 |
| commit | 59bd55c41e02eab2ac01cd3adbdda1950f7fb09e (patch) | |
| tree | d580917ddd736d45812f7e5b54a31ffb2b60f08e /common/i2c_slave.c | |
| parent | ee28ccb0ca0a76ff3c097471ba7732facf404663 (diff) | |
| download | chrome-ec-59bd55c41e02eab2ac01cd3adbdda1950f7fb09e.tar.gz | |
i2c: separate slave and master code
Split i2c.c code in two (i2c_slave.c and i2c_master.c). i2c_slave.c is
used when EC has no i2c device connected (i2c master code not needed)
but EC is connected to AP via i2c.
BRANCH=none
BUG=b:37584134
TEST=1. Compile rose board with CONFIG_I2C and CONFIG_CMD_HOSTCMD. Then
make sure EC_CMD_GET_PROTOCOL_INFO works.
2. On Kevin and Elm, cherry-pick to firmware branch respectively,
build and flash ec, i2c function works.
Change-Id: I1f95ad277713c5e30913e0a010ca03dfd9ec248c
Signed-off-by: Wei-Ning Huang <wnhuang@google.com>
Reviewed-on: https://chromium-review.googlesource.com/484999
Commit-Ready: Wei-Ning Huang <wnhuang@chromium.org>
Tested-by: Wei-Ning Huang <wnhuang@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'common/i2c_slave.c')
| -rw-r--r-- | common/i2c_slave.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/common/i2c_slave.c b/common/i2c_slave.c new file mode 100644 index 0000000000..3dbb7d1036 --- /dev/null +++ b/common/i2c_slave.c @@ -0,0 +1,28 @@ +/* Copyright 2017 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. + */ + +/* I2C slave cross-platform code for Chrome EC */ + +#include "host_command.h" +#include "i2c.h" +#include "util.h" + +int i2c_get_protocol_info(struct host_cmd_handler_args *args) +{ + struct ec_response_get_protocol_info *r = args->response; + + memset(r, 0, sizeof(*r)); + r->protocol_versions = (1 << 3); + r->max_request_packet_size = I2C_MAX_HOST_PACKET_SIZE; + r->max_response_packet_size = I2C_MAX_HOST_PACKET_SIZE; + r->flags = 0; + + args->response_size = sizeof(*r); + + return EC_SUCCESS; +} +DECLARE_HOST_COMMAND(EC_CMD_GET_PROTOCOL_INFO, + i2c_get_protocol_info, + EC_VER_MASK(0)); |