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 Chipid required properties:
  45 - compatible: Should be "atmel,sama5d2-chipid"
  46 - reg : Should contain registers location and length
  47
  48 PIT Timer required properties:
  49 - compatible: Should be "atmel,at91sam9260-pit"
  50 - reg: Should contain registers location and length
  51 - interrupts: Should contain interrupt for the PIT which is the IRQ line
  52   shared across all System Controller members.
  53
  54 System Timer (ST) required properties:
  55 - compatible: Should be "atmel,at91rm9200-st", "syscon", "simple-mfd"
  56 - reg: Should contain registers location and length
  57 - interrupts: Should contain interrupt for the ST which is the IRQ line
  58   shared across all System Controller members.
  59 - clocks: phandle to input clock.
  60 Its subnodes can be:
  61 - watchdog: compatible should be "atmel,at91rm9200-wdt"
  62
  63 TC/TCLIB Timer required properties:
  64 - compatible: Should be "atmel,<chip>-tcb".
  65   <chip> can be "at91rm9200" or "at91sam9x5"
  66 - reg: Should contain registers location and length
  67 - interrupts: Should contain all interrupts for the TC block
  68   Note that you can specify several interrupt cells if the TC
  69   block has one interrupt per channel.
  70 - clock-names: tuple listing input clock names.
  71         Required elements: "t0_clk", "slow_clk"
  72         Optional elements: "t1_clk", "t2_clk"
  73 - clocks: phandles to input clocks.
  74
  75 Examples:
  76
  77 One interrupt per TC block:
  78         tcb0: timer@fff7c000 {
  79                 compatible = "atmel,at91rm9200-tcb";
  80                 reg = <0xfff7c000 0x100>;
  81                 interrupts = <18 4>;
  82                 clocks = <&tcb0_clk>;
  83                 clock-names = "t0_clk";
  84         };
  85
  86 One interrupt per TC channel in a TC block:
  87         tcb1: timer@fffdc000 {
  88                 compatible = "atmel,at91rm9200-tcb";
  89                 reg = <0xfffdc000 0x100>;
  90                 interrupts = <26 4 27 4 28 4>;
  91                 clocks = <&tcb1_clk>;
  92                 clock-names = "t0_clk";
  93         };
  94
  95 RSTC Reset Controller required properties:
  96 - compatible: Should be "atmel,<chip>-rstc".
  97   <chip> can be "at91sam9260" or "at91sam9g45" or "sama5d3"
  98 - reg: Should contain registers location and length
  99 - clocks: phandle to input clock.
 100
 101 Example:
 102
 103         rstc@fffffd00 {
 104                 compatible = "atmel,at91sam9260-rstc";
 105                 reg = <0xfffffd00 0x10>;
 106                 clocks = <&clk32k>;
 107         };
 108
 109 RAMC SDRAM/DDR Controller required properties:
 110 - compatible: Should be "atmel,at91rm9200-sdramc", "syscon"
 111                         "atmel,at91sam9260-sdramc",
 112                         "atmel,at91sam9g45-ddramc",
 113                         "atmel,sama5d3-ddramc",
 114 - reg: Should contain registers location and length
 115
 116 Examples:
 117
 118         ramc0: ramc@ffffe800 {
 119                 compatible = "atmel,at91sam9g45-ddramc";
 120                 reg = <0xffffe800 0x200>;
 121         };
 122
 123 SHDWC Shutdown Controller
 124
 125 required properties:
 126 - compatible: Should be "atmel,<chip>-shdwc".
 127   <chip> can be "at91sam9260", "at91sam9rl" or "at91sam9x5".
 128 - reg: Should contain registers location and length
 129 - clocks: phandle to input clock.
 130
 131 optional properties:
 132 - atmel,wakeup-mode: String, operation mode of the wakeup mode.
 133   Supported values are: "none", "high", "low", "any".
 134 - atmel,wakeup-counter: Counter on Wake-up 0 (between 0x0 and 0xf).
 135
 136 optional at91sam9260 properties:
 137 - atmel,wakeup-rtt-timer: boolean to enable Real-time Timer Wake-up.
 138
 139 optional at91sam9rl properties:
 140 - atmel,wakeup-rtc-timer: boolean to enable Real-time Clock Wake-up.
 141 - atmel,wakeup-rtt-timer: boolean to enable Real-time Timer Wake-up.
 142
 143 optional at91sam9x5 properties:
 144 - atmel,wakeup-rtc-timer: boolean to enable Real-time Clock Wake-up.
 145
 146 Example:
 147
 148         shdwc@fffffd10 {
 149                 compatible = "atmel,at91sam9260-shdwc";
 150                 reg = <0xfffffd10 0x10>;
 151                 clocks = <&clk32k>;
 152         };
 153
 154 Special Function Registers (SFR)
 155
 156 Special Function Registers (SFR) manage specific aspects of the integrated
 157 memory, bridge implementations, processor and other functionality not controlled
 158 elsewhere.
 159
 160 required properties:
 161 - compatible: Should be "atmel,<chip>-sfr", "syscon".
 162   <chip> can be "sama5d3", "sama5d4" or "sama5d2".
 163 - reg: Should contain registers location and length
 164
 165         sfr@f0038000 {
 166                 compatible = "atmel,sama5d3-sfr", "syscon";
 167                 reg = <0xf0038000 0x60>;
 168         };