How to make paging from the basics

controller

PHP Code:

   public function index() {
        $this->load->library('pagination');
        $offset = 0;
        //per_page is the variable of pagination library, if you want you can change this variable name in pagination configs
        if ($this->input->get('per_page') != null) {
            $offset = $this->input->get('per_page');
        }
        $count = 5; //number of posts in page 
        $filter = array();
        
        $data['post_count'] = $this->post_model->get_total_post($filter);
        
        $data['title'] = 'title';
        $data['desc'] = 'Enter the description of this page hot';
        $data['post'] = $this->post_model->get_hotPost($filter, $count, $offset);
        
        $config['base_url'] = base_url() . 'hot';
        $config['total_rows'] = $data['post_count'];
        $config['per_page'] = $count;

        $this->pagination->initialize($config);
        $data['pagination'] = $this->pagination->create_links();
        
        $this->load->view('templates/header', $data);
        $this->load->view('post/hot', $data);
    } 


Model

PHP Code:

   public function get_hotPost($filter, $count, $offset) 
    {
        $this->db->select('id,slug,text,gender,age,views,time,status');
        $this->db->from('post');
        $this->db->where('status', 1);
        $this->db->order_by('views', 'DESC');
        $this->db->limit($count);
        $query = $this->db->get();
        return $query->result_array();
    } 


Unfortunately I'm shown a lot of results (as I have set) and going to the next page shows me the same results. I do not understand why