The Way of Sufi Chivalry by Ibn al-Husayn al-Sulami (translated by Tosun Bayrak al-Jerrahi). The Arabic term translated as "chivalry" is futuwwah. In Arabic, fata literally means a handsome, brave youth. But the book goes on to explain that based on its use in the Quran, the word came to mean "the ideal, noble and perfect man whose hospitality and generosity would extend until he had nothing left for himself; a man who would give all, including his life, for the sake of his friends." (the term is used to describe Abraham in the Quran [21:60] when he destroys the idols of his people.)
Al-Sulami's work doesn't have a martial emphasis, but instead focuses on spiritual attributes associated with the concept of futuwwah.
Also if you are interested in the subject, a Naqshbandi page in a similar vein discusses Spiritual Chivalry or Futuwwah.