1Atmel system registers 2 3Chipid required properties: 4- compatible: Should be "atmel,sama5d2-chipid" or "microchip,sama7g5-chipid" 5- reg : Should contain registers location and length 6 7PIT Timer required properties: 8- compatible: Should be "atmel,at91sam9260-pit" 9- reg: Should contain registers location and length 10- interrupts: Should contain interrupt for the PIT which is the IRQ line 11 shared across all System Controller members. 12 13PIT64B Timer required properties: 14- compatible: Should be "microchip,sam9x60-pit64b" 15- reg: Should contain registers location and length 16- interrupts: Should contain interrupt for PIT64B timer 17- clocks: Should contain the available clock sources for PIT64B timer. 18 19System Timer (ST) required properties: 20- compatible: Should be "atmel,at91rm9200-st", "syscon", "simple-mfd" 21- reg: Should contain registers location and length 22- interrupts: Should contain interrupt for the ST which is the IRQ line 23 shared across all System Controller members. 24- clocks: phandle to input clock. 25Its subnodes can be: 26- watchdog: compatible should be "atmel,at91rm9200-wdt" 27 28RAMC SDRAM/DDR Controller required properties: 29- compatible: Should be "atmel,at91rm9200-sdramc", "syscon" 30 "atmel,at91sam9260-sdramc", 31 "atmel,at91sam9g45-ddramc", 32 "atmel,sama5d3-ddramc", 33 "microchip,sam9x60-ddramc", 34 "microchip,sama7g5-uddrc" 35- reg: Should contain registers location and length 36 37Examples: 38 39 ramc0: ramc@ffffe800 { 40 compatible = "atmel,at91sam9g45-ddramc"; 41 reg = <0xffffe800 0x200>; 42 }; 43 44RAMC PHY Controller required properties: 45- compatible: Should be "microchip,sama7g5-ddr3phy", "syscon" 46- reg: Should contain registers location and length 47 48Example: 49 50 ddr3phy: ddr3phy@e3804000 { 51 compatible = "microchip,sama7g5-ddr3phy", "syscon"; 52 reg = <0xe3804000 0x1000>; 53}; 54 55Special Function Registers (SFR) 56 57Special Function Registers (SFR) manage specific aspects of the integrated 58memory, bridge implementations, processor and other functionality not controlled 59elsewhere. 60 61required properties: 62- compatible: Should be "atmel,<chip>-sfr", "syscon" or 63 "atmel,<chip>-sfrbu", "syscon" 64 <chip> can be "sama5d3", "sama5d4" or "sama5d2". 65 It also can be "microchip,sam9x60-sfr", "syscon". 66- reg: Should contain registers location and length 67 68 sfr@f0038000 { 69 compatible = "atmel,sama5d3-sfr", "syscon"; 70 reg = <0xf0038000 0x60>; 71 }; 72 73Security Module (SECUMOD) 74 75The Security Module macrocell provides all necessary secure functions to avoid 76voltage, temperature, frequency and mechanical attacks on the chip. It also 77embeds secure memories that can be scrambled. 78 79The Security Module also offers the PIOBU pins which can be used as GPIO pins. 80Note that they maintain their voltage during Backup/Self-refresh. 81 82required properties: 83- compatible: Should be "atmel,<chip>-secumod", "syscon". 84 <chip> can be "sama5d2". 85- reg: Should contain registers location and length 86- gpio-controller: Marks the port as GPIO controller. 87- #gpio-cells: There are 2. The pin number is the 88 first, the second represents additional 89 parameters such as GPIO_ACTIVE_HIGH/LOW. 90 91 92 secumod@fc040000 { 93 compatible = "atmel,sama5d2-secumod", "syscon"; 94 reg = <0xfc040000 0x100>; 95 gpio-controller; 96 #gpio-cells = <2>; 97 }; 98