DIV_ROUNDUP
cpu_to_be16(DIV_ROUNDUP((i * 65536), num_entries));
lut_index = DIV_ROUNDUP((i * params.backlight_lut_array_size), num_entries);
cpu_to_be16(DIV_ROUNDUP((i * 65536), num_entries)) :
cpu_to_le16(DIV_ROUNDUP((i * 65536), num_entries));