1Atmel system registers 2 3Chipid required properties: 4- compatible: Should be "atmel,sama5d2-chipid" or "microchip,sama7g5-chipid" 5 "microchip,sama7d65-chipid" 6- reg : Should contain registers location and length 7 8PIT Timer required properties: 9- compatible: Should be "atmel,at91sam9260-pit" 10- reg: Should contain registers location and length 11- interrupts: Should contain interrupt for the PIT which is the IRQ line 12 shared across all System Controller members. 13 14PIT64B Timer required properties: 15- compatible: Should be "microchip,sam9x60-pit64b" or 16 "microchip,sam9x7-pit64b", "microchip,sam9x60-pit64b" 17 "microchip,sama7d65-pit64b", "microchip,sam9x60-pit64b" 18- reg: Should contain registers location and length 19- interrupts: Should contain interrupt for PIT64B timer 20- clocks: Should contain the available clock sources for PIT64B timer. 21 22System Timer (ST) required properties: 23- compatible: Should be "atmel,at91rm9200-st", "syscon", "simple-mfd" 24- reg: Should contain registers location and length 25- interrupts: Should contain interrupt for the ST which is the IRQ line 26 shared across all System Controller members. 27- clocks: phandle to input clock. 28Its subnodes can be: 29- watchdog: compatible should be "atmel,at91rm9200-wdt" 30 31RAMC SDRAM/DDR Controller required properties: 32- compatible: Should be "atmel,at91rm9200-sdramc", "syscon" or 33 "atmel,at91sam9260-sdramc" or 34 "atmel,at91sam9g45-ddramc" or 35 "atmel,sama5d3-ddramc" or 36 "microchip,sam9x60-ddramc" or 37 "microchip,sama7g5-uddrc" or 38 "microchip,sama7d65-uddrc", "microchip,sama7g5-uddrc" or 39 "microchip,sam9x7-ddramc", "atmel,sama5d3-ddramc". 40- reg: Should contain registers location and length 41 42Examples: 43 44 ramc0: ramc@ffffe800 { 45 compatible = "atmel,at91sam9g45-ddramc"; 46 reg = <0xffffe800 0x200>; 47 }; 48 49Security Module (SECUMOD) 50 51The Security Module macrocell provides all necessary secure functions to avoid 52voltage, temperature, frequency and mechanical attacks on the chip. It also 53embeds secure memories that can be scrambled. 54 55The Security Module also offers the PIOBU pins which can be used as GPIO pins. 56Note that they maintain their voltage during Backup/Self-refresh. 57 58required properties: 59- compatible: Should be "atmel,<chip>-secumod", "syscon". 60 <chip> can be "sama5d2". 61- reg: Should contain registers location and length 62- gpio-controller: Marks the port as GPIO controller. 63- #gpio-cells: There are 2. The pin number is the 64 first, the second represents additional 65 parameters such as GPIO_ACTIVE_HIGH/LOW. 66 67 68 secumod@fc040000 { 69 compatible = "atmel,sama5d2-secumod", "syscon"; 70 reg = <0xfc040000 0x100>; 71 gpio-controller; 72 #gpio-cells = <2>; 73 }; 74