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| author | Jett Rink <jettrink@chromium.org> | 2019-05-08 07:34:00 -0600 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2019-05-16 21:33:04 +0000 |
| commit | ca1539bde69c849672a527fc8267839f0223b4e9 (patch) | |
| tree | a3bea7732a69e20e3debe2e2f7a5d885a497381c /common | |
| parent | 41adb7a6fafb057544bc9ec567d2865150c5f911 (diff) | |
| download | chrome-ec-ca1539bde69c849672a527fc8267839f0223b4e9.tar.gz | |
i2c: add i2clookup host command
Add a new host command that will allow you to lookup a well known device
on the EC. This is useful for FAFT tests that want to talk directly
with i2c devices but don't know the physical address for each platform.
BRANCH=octopus
BUG=b:119065537
TEST=Used this with new faft test in CL:1601300
Change-Id: I82c2d5462fcb4edbc92ea60765971190fed7ae81
Signed-off-by: Jett Rink <jettrink@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1601060
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
(cherry picked from commit 45434aed20e695e08fcbb3f74c43e03f6fa19bf2)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1615653
Reviewed-by: Diana Z <dzigterman@chromium.org>
Diffstat (limited to 'common')
| -rw-r--r-- | common/i2c_master.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/common/i2c_master.c b/common/i2c_master.c index c2cc22f06c..73771f412e 100644 --- a/common/i2c_master.c +++ b/common/i2c_master.c @@ -761,6 +761,34 @@ static int i2c_command_passthru(struct host_cmd_handler_args *args) } DECLARE_HOST_COMMAND(EC_CMD_I2C_PASSTHRU, i2c_command_passthru, EC_VER_MASK(0)); +static int i2c_command_lookup(struct host_cmd_handler_args *args) +{ + const struct ec_params_i2c_lookup *params = args->params; + struct ec_response_i2c_lookup *resp = args->response; + + switch (params->type) { + case I2C_LOOKUP_TYPE_CBI_EEPROM: +#ifdef CONFIG_CROS_BOARD_INFO + resp->i2c_port = I2C_PORT_EEPROM; + /* Convert from 8-bit address to 7-bit address */ + resp->i2c_addr = I2C_ADDR_EEPROM >> 1; +#else + /* Lookup type is supported, but not present on system. */ + return EC_RES_UNAVAILABLE; +#endif /* CONFIG_CROS_BOARD_INFO */ + break; + default: + /* The type was unrecognized */ + return EC_RES_INVALID_PARAM; + } + + args->response_size = sizeof(*resp); + return EC_RES_SUCCESS; +} +DECLARE_HOST_COMMAND(EC_CMD_I2C_LOOKUP, i2c_command_lookup, EC_VER_MASK(0)); +/* If the params union expands in the future, need to bump EC_VER_MASK */ +BUILD_ASSERT(sizeof(struct ec_params_i2c_lookup) == 4); + void i2c_passthru_protect_port(uint32_t port) { if (port < I2C_PORT_COUNT) |