1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/rtc/st,m41t93.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: ST M41T93 RTC and compatible 8 9maintainers: 10 - Akhilesh Patil <akhilesh@ee.iitb.ac.in> 11 12description: 13 ST M41T93 is spi based Real Time Clock (RTC) with time, date, 14 alarm, watchdog, square wave clock output, 8 bit timer and 15 7 bytes of user SRAM. 16 17properties: 18 compatible: 19 enum: 20 - st,m41t93 21 22 reg: 23 maxItems: 1 24 25 "#clock-cells": 26 const: 0 27 28required: 29 - compatible 30 - reg 31 32allOf: 33 - $ref: rtc.yaml 34 - $ref: /schemas/spi/spi-peripheral-props.yaml# 35 36unevaluatedProperties: false 37 38examples: 39 - | 40 spi { 41 #address-cells = <1>; 42 #size-cells = <0>; 43 rtc@0 { 44 compatible = "st,m41t93"; 45 reg = <0>; 46 #clock-cells = <0>; 47 spi-max-frequency = <2000000>; 48 }; 49 }; 50 51