Adding Custom Branded Footer in Jetpack Infinite Scroll

/* Adding custom branded footer to Jetpack Infinite Scroll */
function branded_footer(){
        // Branded footer content will go here.
}

function theme_infinite_scroll_settings($args){
	if(is_array($args)){
		$args['footer_callback'] = 'branded_footer';
		return $args;
	}
}
add_filter('infinite_scroll_settings', 'theme_infinite_scroll_settings');