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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /Documentation/devicetree/bindings/arm/atmel-at91.txt
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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,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"
+- 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",
+ "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>;
+ };