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