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Atmel AT91 device tree bindings.
================================
Boards with a SoC of the Atmel AT91 or SMART family shall have the following
properties:
Required root node properties:
compatible: must be one of:
* "atmel,at91rm9200"
* "atmel,at91sam9" for SoCs using an ARM926EJ-S core, shall be extended with
the specific SoC family or compatible:
o "atmel,at91sam9260"
o "atmel,at91sam9261"
o "atmel,at91sam9263"
o "atmel,at91sam9x5" for the 5 series, shall be extended with the specific
SoC compatible:
- "atmel,at91sam9g15"
- "atmel,at91sam9g25"
- "atmel,at91sam9g35"
- "atmel,at91sam9x25"
- "atmel,at91sam9x35"
o "atmel,at91sam9g20"
o "atmel,at91sam9g45"
o "atmel,at91sam9n12"
o "atmel,at91sam9rl"
o "atmel,at91sam9xe"
* "atmel,sama5" for SoCs using a Cortex-A5, shall be extended with the specific
SoC family:
o "atmel,sama5d2" shall be extended with the specific SoC compatible:
- "atmel,sama5d27"
o "atmel,sama5d3" shall be extended with the specific SoC compatible:
- "atmel,sama5d31"
- "atmel,sama5d33"
- "atmel,sama5d34"
- "atmel,sama5d35"
- "atmel,sama5d36"
o "atmel,sama5d4" shall be extended with the specific SoC compatible:
- "atmel,sama5d41"
- "atmel,sama5d42"
- "atmel,sama5d43"
- "atmel,sama5d44"
PIT Timer required properties:
- compatible: Should be "atmel,at91sam9260-pit"
- reg: Should contain registers location and length
- interrupts: Should contain interrupt for the PIT which is the IRQ line
shared across all System Controller members.
System Timer (ST) required properties:
- compatible: Should be "atmel,at91rm9200-st", "syscon", "simple-mfd"
- reg: Should contain registers location and length
- interrupts: Should contain interrupt for the ST which is the IRQ line
shared across all System Controller members.
Its subnodes can be:
- watchdog: compatible should be "atmel,at91rm9200-wdt"
TC/TCLIB Timer required properties:
- compatible: Should be "atmel,<chip>-tcb".
<chip> can be "at91rm9200" or "at91sam9x5"
- reg: Should contain registers location and length
- interrupts: Should contain all interrupts for the TC block
Note that you can specify several interrupt cells if the TC
block has one interrupt per channel.
- clock-names: tuple listing input clock names.
Required elements: "t0_clk"
Optional elements: "t1_clk", "t2_clk"
- clocks: phandles to input clocks.
Examples:
One interrupt per TC block:
tcb0: timer@fff7c000 {
compatible = "atmel,at91rm9200-tcb";
reg = <0xfff7c000 0x100>;
interrupts = <18 4>;
clocks = <&tcb0_clk>;
clock-names = "t0_clk";
};
One interrupt per TC channel in a TC block:
tcb1: timer@fffdc000 {
compatible = "atmel,at91rm9200-tcb";
reg = <0xfffdc000 0x100>;
interrupts = <26 4 27 4 28 4>;
clocks = <&tcb1_clk>;
clock-names = "t0_clk";
};
RSTC Reset Controller required properties:
- compatible: Should be "atmel,<chip>-rstc".
<chip> can be "at91sam9260" or "at91sam9g45" or "sama5d3"
- reg: Should contain registers location and length
Example:
rstc@fffffd00 {
compatible = "atmel,at91sam9260-rstc";
reg = <0xfffffd00 0x10>;
};
RAMC SDRAM/DDR Controller required properties:
- compatible: Should be "atmel,at91rm9200-sdramc", "syscon"
"atmel,at91sam9260-sdramc",
"atmel,at91sam9g45-ddramc",
"atmel,sama5d3-ddramc",
- reg: Should contain registers location and length
Examples:
ramc0: ramc@ffffe800 {
compatible = "atmel,at91sam9g45-ddramc";
reg = <0xffffe800 0x200>;
};
SHDWC Shutdown Controller
required properties:
- compatible: Should be "atmel,<chip>-shdwc".
<chip> can be "at91sam9260", "at91sam9rl" or "at91sam9x5".
- reg: Should contain registers location and length
optional properties:
- atmel,wakeup-mode: String, operation mode of the wakeup mode.
Supported values are: "none", "high", "low", "any".
- atmel,wakeup-counter: Counter on Wake-up 0 (between 0x0 and 0xf).
optional at91sam9260 properties:
- atmel,wakeup-rtt-timer: boolean to enable Real-time Timer Wake-up.
optional at91sam9rl properties:
- atmel,wakeup-rtc-timer: boolean to enable Real-time Clock Wake-up.
- atmel,wakeup-rtt-timer: boolean to enable Real-time Timer Wake-up.
optional at91sam9x5 properties:
- atmel,wakeup-rtc-timer: boolean to enable Real-time Clock Wake-up.
Example:
rstc@fffffd00 {
compatible = "atmel,at91sam9260-rstc";
reg = <0xfffffd00 0x10>;
};
Special Function Registers (SFR)
Special Function Registers (SFR) manage specific aspects of the integrated
memory, bridge implementations, processor and other functionality not controlled
elsewhere.
required properties:
- compatible: Should be "atmel,<chip>-sfr", "syscon".
<chip> can be "sama5d3" or "sama5d4".
- reg: Should contain registers location and length
sfr@f0038000 {
compatible = "atmel,sama5d3-sfr", "syscon";
reg = <0xf0038000 0x60>;
};
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