1*b70598b3SAkhilesh Patil# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2*b70598b3SAkhilesh Patil%YAML 1.2 3*b70598b3SAkhilesh Patil--- 4*b70598b3SAkhilesh Patil$id: http://devicetree.org/schemas/rtc/st,m41t93.yaml# 5*b70598b3SAkhilesh Patil$schema: http://devicetree.org/meta-schemas/core.yaml# 6*b70598b3SAkhilesh Patil 7*b70598b3SAkhilesh Patiltitle: ST M41T93 RTC and compatible 8*b70598b3SAkhilesh Patil 9*b70598b3SAkhilesh Patilmaintainers: 10*b70598b3SAkhilesh Patil - Akhilesh Patil <akhilesh@ee.iitb.ac.in> 11*b70598b3SAkhilesh Patil 12*b70598b3SAkhilesh Patildescription: 13*b70598b3SAkhilesh Patil ST M41T93 is spi based Real Time Clock (RTC) with time, date, 14*b70598b3SAkhilesh Patil alarm, watchdog, square wave clock output, 8 bit timer and 15*b70598b3SAkhilesh Patil 7 bytes of user SRAM. 16*b70598b3SAkhilesh Patil 17*b70598b3SAkhilesh Patilproperties: 18*b70598b3SAkhilesh Patil compatible: 19*b70598b3SAkhilesh Patil enum: 20*b70598b3SAkhilesh Patil - st,m41t93 21*b70598b3SAkhilesh Patil 22*b70598b3SAkhilesh Patil reg: 23*b70598b3SAkhilesh Patil maxItems: 1 24*b70598b3SAkhilesh Patil 25*b70598b3SAkhilesh Patil "#clock-cells": 26*b70598b3SAkhilesh Patil const: 0 27*b70598b3SAkhilesh Patil 28*b70598b3SAkhilesh Patilrequired: 29*b70598b3SAkhilesh Patil - compatible 30*b70598b3SAkhilesh Patil - reg 31*b70598b3SAkhilesh Patil 32*b70598b3SAkhilesh PatilallOf: 33*b70598b3SAkhilesh Patil - $ref: rtc.yaml 34*b70598b3SAkhilesh Patil - $ref: /schemas/spi/spi-peripheral-props.yaml# 35*b70598b3SAkhilesh Patil 36*b70598b3SAkhilesh PatilunevaluatedProperties: false 37*b70598b3SAkhilesh Patil 38*b70598b3SAkhilesh Patilexamples: 39*b70598b3SAkhilesh Patil - | 40*b70598b3SAkhilesh Patil spi { 41*b70598b3SAkhilesh Patil #address-cells = <1>; 42*b70598b3SAkhilesh Patil #size-cells = <0>; 43*b70598b3SAkhilesh Patil rtc@0 { 44*b70598b3SAkhilesh Patil compatible = "st,m41t93"; 45*b70598b3SAkhilesh Patil reg = <0>; 46*b70598b3SAkhilesh Patil #clock-cells = <0>; 47*b70598b3SAkhilesh Patil spi-max-frequency = <2000000>; 48*b70598b3SAkhilesh Patil }; 49*b70598b3SAkhilesh Patil }; 50*b70598b3SAkhilesh Patil 51