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| author | Gwendal Grignou <gwendal@chromium.org> | 2019-06-03 11:33:54 -0700 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2019-06-10 09:15:08 +0100 |
| commit | a47bc8a4e88b35d9ea97ecd773cd7e0688b3322a (patch) | |
| tree | 431e980c877230529d820946fffabd8f1fc4dc65 | |
| parent | 77c48c76ad91cf774df26c6e5c74c76842943802 (diff) | |
| download | linux-stable-a47bc8a4e88b35d9ea97ecd773cd7e0688b3322a.tar.gz linux-stable-a47bc8a4e88b35d9ea97ecd773cd7e0688b3322a.tar.bz2 linux-stable-a47bc8a4e88b35d9ea97ecd773cd7e0688b3322a.zip | |
mfd: cros_ec: Add I2C passthru protection API
Prevent direct i2c access to device behind EC when not in development mode.
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Acked-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Fabien Lahoudere <fabien.lahoudere@collabora.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
| -rw-r--r-- | include/linux/mfd/cros_ec_commands.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h index 49ea905cfd18..59ad6bae3f9b 100644 --- a/include/linux/mfd/cros_ec_commands.h +++ b/include/linux/mfd/cros_ec_commands.h @@ -4318,6 +4318,28 @@ struct ec_params_entering_mode { /*****************************************************************************/ /* + * I2C passthru protection command: Protects I2C tunnels against access on + * certain addresses (board-specific). + */ +#define EC_CMD_I2C_PASSTHRU_PROTECT 0x00B7 + +enum ec_i2c_passthru_protect_subcmd { + EC_CMD_I2C_PASSTHRU_PROTECT_STATUS = 0x0, + EC_CMD_I2C_PASSTHRU_PROTECT_ENABLE = 0x1, +}; + +struct ec_params_i2c_passthru_protect { + uint8_t subcmd; + uint8_t port; /* I2C port number */ +} __ec_align1; + +struct ec_response_i2c_passthru_protect { + uint8_t status; /* Status flags (0: unlocked, 1: locked) */ +} __ec_align1; + + +/*****************************************************************************/ +/* * HDMI CEC commands * * These commands are for sending and receiving message via HDMI CEC |