Documentation/devicetree/bindings/arm/atmel-at91.txt

   1 Atmel AT91 device tree bindings.
   2 ================================
   3
   4 Boards with a SoC of the Atmel AT91 or SMART family shall have the following
   5 properties:
   6
   7 Required root node properties:
   8 compatible: must be one of:
   9  * "atmel,at91rm9200"
  10
  11  * "atmel,at91sam9" for SoCs using an ARM926EJ-S core, shall be extended with
  12    the specific SoC family or compatible:
  13     o "atmel,at91sam9260"
  14     o "atmel,at91sam9261"
  15     o "atmel,at91sam9263"
  16     o "atmel,at91sam9x5" for the 5 series, shall be extended with the specific
  17       SoC compatible:
  18        - "atmel,at91sam9g15"
  19        - "atmel,at91sam9g25"
  20        - "atmel,at91sam9g35"
  21        - "atmel,at91sam9x25"
  22        - "atmel,at91sam9x35"
  23     o "atmel,at91sam9g20"
  24     o "atmel,at91sam9g45"
  25     o "atmel,at91sam9n12"
  26     o "atmel,at91sam9rl"
  27     o "atmel,at91sam9xe"
  28  * "atmel,sama5" for SoCs using a Cortex-A5, shall be extended with the specific
  29    SoC family:
  30     o "atmel,sama5d2" shall be extended with the specific SoC compatible:
  31        - "atmel,sama5d27"
  32     o "atmel,sama5d3" shall be extended with the specific SoC compatible:
  33        - "atmel,sama5d31"
  34        - "atmel,sama5d33"
  35        - "atmel,sama5d34"
  36        - "atmel,sama5d35"
  37        - "atmel,sama5d36"
  38     o "atmel,sama5d4" shall be extended with the specific SoC compatible:
  39        - "atmel,sama5d41"
  40        - "atmel,sama5d42"
  41        - "atmel,sama5d43"
  42        - "atmel,sama5d44"
  43
  44 PIT Timer required properties:
  45 - compatible: Should be "atmel,at91sam9260-pit"
  46 - reg: Should contain registers location and length
  47 - interrupts: Should contain interrupt for the PIT which is the IRQ line
  48   shared across all System Controller members.
  49
  50 System Timer (ST) required properties:
  51 - compatible: Should be "atmel,at91rm9200-st", "syscon", "simple-mfd"
  52 - reg: Should contain registers location and length
  53 - interrupts: Should contain interrupt for the ST which is the IRQ line
  54   shared across all System Controller members.
  55 Its subnodes can be:
  56 - watchdog: compatible should be "atmel,at91rm9200-wdt"
  57
  58 TC/TCLIB Timer required properties:
  59 - compatible: Should be "atmel,<chip>-tcb".
  60   <chip> can be "at91rm9200" or "at91sam9x5"
  61 - reg: Should contain registers location and length
  62 - interrupts: Should contain all interrupts for the TC block
  63   Note that you can specify several interrupt cells if the TC
  64   block has one interrupt per channel.
  65 - clock-names: tuple listing input clock names.
  66         Required elements: "t0_clk"
  67         Optional elements: "t1_clk", "t2_clk"
  68 - clocks: phandles to input clocks.
  69
  70 Examples:
  71
  72 One interrupt per TC block:
  73         tcb0: timer@fff7c000 {
  74                 compatible = "atmel,at91rm9200-tcb";
  75                 reg = <0xfff7c000 0x100>;
  76                 interrupts = <18 4>;
  77                 clocks = <&tcb0_clk>;
  78                 clock-names = "t0_clk";
  79         };
  80
  81 One interrupt per TC channel in a TC block:
  82         tcb1: timer@fffdc000 {
  83                 compatible = "atmel,at91rm9200-tcb";
  84                 reg = <0xfffdc000 0x100>;
  85                 interrupts = <26 4 27 4 28 4>;
  86                 clocks = <&tcb1_clk>;
  87                 clock-names = "t0_clk";
  88         };
  89
  90 RSTC Reset Controller required properties:
  91 - compatible: Should be "atmel,<chip>-rstc".
  92   <chip> can be "at91sam9260" or "at91sam9g45" or "sama5d3"
  93 - reg: Should contain registers location and length
  94
  95 Example:
  96
  97         rstc@fffffd00 {
  98                 compatible = "atmel,at91sam9260-rstc";
  99                 reg = <0xfffffd00 0x10>;
 100         };
 101
 102 RAMC SDRAM/DDR Controller required properties:
 103 - compatible: Should be "atmel,at91rm9200-sdramc", "syscon"
 104                         "atmel,at91sam9260-sdramc",
 105                         "atmel,at91sam9g45-ddramc",
 106                         "atmel,sama5d3-ddramc",
 107 - reg: Should contain registers location and length
 108
 109 Examples:
 110
 111         ramc0: ramc@ffffe800 {
 112                 compatible = "atmel,at91sam9g45-ddramc";
 113                 reg = <0xffffe800 0x200>;
 114         };
 115
 116 SHDWC Shutdown Controller
 117
 118 required properties:
 119 - compatible: Should be "atmel,<chip>-shdwc".
 120   <chip> can be "at91sam9260", "at91sam9rl" or "at91sam9x5".
 121 - reg: Should contain registers location and length
 122
 123 optional properties:
 124 - atmel,wakeup-mode: String, operation mode of the wakeup mode.
 125   Supported values are: "none", "high", "low", "any".
 126 - atmel,wakeup-counter: Counter on Wake-up 0 (between 0x0 and 0xf).
 127
 128 optional at91sam9260 properties:
 129 - atmel,wakeup-rtt-timer: boolean to enable Real-time Timer Wake-up.
 130
 131 optional at91sam9rl properties:
 132 - atmel,wakeup-rtc-timer: boolean to enable Real-time Clock Wake-up.
 133 - atmel,wakeup-rtt-timer: boolean to enable Real-time Timer Wake-up.
 134
 135 optional at91sam9x5 properties:
 136 - atmel,wakeup-rtc-timer: boolean to enable Real-time Clock Wake-up.
 137
 138 Example:
 139
 140         rstc@fffffd00 {
 141                 compatible = "atmel,at91sam9260-rstc";
 142                 reg = <0xfffffd00 0x10>;
 143         };
 144
 145 Special Function Registers (SFR)
 146
 147 Special Function Registers (SFR) manage specific aspects of the integrated
 148 memory, bridge implementations, processor and other functionality not controlled
 149 elsewhere.
 150
 151 required properties:
 152 - compatible: Should be "atmel,<chip>-sfr", "syscon".
 153   <chip> can be "sama5d3" or "sama5d4".
 154 - reg: Should contain registers location and length
 155
 156         sfr@f0038000 {
 157                 compatible = "atmel,sama5d3-sfr", "syscon";
 158                 reg = <0xf0038000 0x60>;
 159         };