mfd: cros_ec: Add I2C passthru protection API (a47bc8a4) · Commits · 戴 / test

Prevent direct i2c access to device behind EC when not in development mode. Signed-off-by:

include/linux/mfd/cros_ec_commands.h

+22 −0

Original line number	Diff line number	Diff line
		@@ -4316,6 +4316,28 @@ struct ec_params_entering_mode {
		#define VBOOT_MODE_DEVELOPER 1
		#define VBOOT_MODE_RECOVERY 2

		/*****************************************************************************/
		/*
		* 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