Wikipedia
Pattusali (also spelt as Pattushali or Patha Sali) is a caste of the Telugu-speaking weavers caste. They are found largely in the South Indian states of Andhra Pradesh, Karnataka and Tamil Nadu. The members of this subcaste specialise in weaving silk cloth, known as Pattu in Tamil, hence the name Pattusali.
The Tamil name by which these people is known in Southern India is Patnūlkarar, that is silk-thread workers or weavers who speak "Pattunuli" or "Khatri", a dialect of Gujarati. The details about Sourashtra community is discussed by A.J. Saunders. The Bhagavata calls the Abhiras as Saurastra. The Bhagavata calls the Abhiras as saurastra and Avantyas rulers (Saurastra-Avantya-Abhira) and the Vishnu treats the Abhiras as occupying the Saurastra and Avanti provinces. Sourashtra-Patnūlkarar-pattusali wear the sacred thread and are Brahmins but belong to linguistic minorities. Sourashtrians are pre-dominantly vegetarians by birth and their ancestral origin is Gujarat.
In Tamil Nadu, they still maintain varied level of mixed language with Telugu, Marathi & Tamil. In other places they adopted the local language completely.
Pattusalis are Sourastra people and is not a subcaste of Padmasalis, the Pattusalis follow the Tamil style of cloth weaving, and had Tamil customs and followed Tamil practices. All the community members follow Hinduism and are mainly Vaishnavas, though there is a significant proportion of Shaivas as well.