mcp16502_get_state_reg
reg = mcp16502_get_state_reg(rdev, MCP16502_OPMODE_ACTIVE);
reg = mcp16502_get_state_reg(rdev, op_mode);
return mcp16502_get_state_reg(rdev, MCP16502_OPMODE_LPM);
return mcp16502_get_state_reg(rdev, MCP16502_OPMODE_HIB);