3adaa36e48
Convert Microchip AT91 SAMA5D2 shutdown controller to YAML. SAMA7G5 SHDWC DT node (available in arch/arm/boot/dts/sama7g5.dtsi) has syscon along with its compatible. There is no usage of this syscon in the current code but it may be necessary in future as some registers of SHDWC are accessed in different drivers (at91-sama5d2_shdwc.c and arch/arm/mach-at91/pm.c). Thus update the YAML with it to make DT checkers happy. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
98 lines
3.1 KiB
Plaintext
98 lines
3.1 KiB
Plaintext
Atmel system registers
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Chipid required properties:
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- compatible: Should be "atmel,sama5d2-chipid" or "microchip,sama7g5-chipid"
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- reg : Should contain registers location and length
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PIT Timer required properties:
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- compatible: Should be "atmel,at91sam9260-pit"
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- reg: Should contain registers location and length
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- interrupts: Should contain interrupt for the PIT which is the IRQ line
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shared across all System Controller members.
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PIT64B Timer required properties:
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- compatible: Should be "microchip,sam9x60-pit64b"
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- reg: Should contain registers location and length
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- interrupts: Should contain interrupt for PIT64B timer
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- clocks: Should contain the available clock sources for PIT64B timer.
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System Timer (ST) required properties:
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- compatible: Should be "atmel,at91rm9200-st", "syscon", "simple-mfd"
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- reg: Should contain registers location and length
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- interrupts: Should contain interrupt for the ST which is the IRQ line
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shared across all System Controller members.
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- clocks: phandle to input clock.
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Its subnodes can be:
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- watchdog: compatible should be "atmel,at91rm9200-wdt"
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RAMC SDRAM/DDR Controller required properties:
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- compatible: Should be "atmel,at91rm9200-sdramc", "syscon"
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"atmel,at91sam9260-sdramc",
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"atmel,at91sam9g45-ddramc",
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"atmel,sama5d3-ddramc",
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"microchip,sam9x60-ddramc",
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"microchip,sama7g5-uddrc"
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- reg: Should contain registers location and length
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Examples:
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ramc0: ramc@ffffe800 {
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compatible = "atmel,at91sam9g45-ddramc";
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reg = <0xffffe800 0x200>;
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};
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RAMC PHY Controller required properties:
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- compatible: Should be "microchip,sama7g5-ddr3phy", "syscon"
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- reg: Should contain registers location and length
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Example:
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ddr3phy: ddr3phy@e3804000 {
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compatible = "microchip,sama7g5-ddr3phy", "syscon";
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reg = <0xe3804000 0x1000>;
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};
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Special Function Registers (SFR)
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Special Function Registers (SFR) manage specific aspects of the integrated
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memory, bridge implementations, processor and other functionality not controlled
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elsewhere.
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required properties:
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- compatible: Should be "atmel,<chip>-sfr", "syscon" or
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"atmel,<chip>-sfrbu", "syscon"
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<chip> can be "sama5d3", "sama5d4" or "sama5d2".
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It also can be "microchip,sam9x60-sfr", "syscon".
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- reg: Should contain registers location and length
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sfr@f0038000 {
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compatible = "atmel,sama5d3-sfr", "syscon";
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reg = <0xf0038000 0x60>;
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};
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Security Module (SECUMOD)
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The Security Module macrocell provides all necessary secure functions to avoid
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voltage, temperature, frequency and mechanical attacks on the chip. It also
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embeds secure memories that can be scrambled.
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The Security Module also offers the PIOBU pins which can be used as GPIO pins.
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Note that they maintain their voltage during Backup/Self-refresh.
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required properties:
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- compatible: Should be "atmel,<chip>-secumod", "syscon".
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<chip> can be "sama5d2".
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- reg: Should contain registers location and length
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- gpio-controller: Marks the port as GPIO controller.
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- #gpio-cells: There are 2. The pin number is the
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first, the second represents additional
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parameters such as GPIO_ACTIVE_HIGH/LOW.
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secumod@fc040000 {
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compatible = "atmel,sama5d2-secumod", "syscon";
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reg = <0xfc040000 0x100>;
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gpio-controller;
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#gpio-cells = <2>;
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};
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