diff options
Diffstat (limited to 'Documentation/devicetree/bindings/arm/atmel-sysregs.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/arm/atmel-sysregs.txt | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/arm/atmel-sysregs.txt b/Documentation/devicetree/bindings/arm/atmel-sysregs.txt index 4b96608ad692..14f319f694b7 100644 --- a/Documentation/devicetree/bindings/arm/atmel-sysregs.txt +++ b/Documentation/devicetree/bindings/arm/atmel-sysregs.txt @@ -158,14 +158,24 @@ Security Module (SECUMOD) The Security Module macrocell provides all necessary secure functions to avoid voltage, temperature, frequency and mechanical attacks on the chip. It also -embeds secure memories that can be scrambled +embeds secure memories that can be scrambled. + +The Security Module also offers the PIOBU pins which can be used as GPIO pins. +Note that they maintain their voltage during Backup/Self-refresh. required properties: - compatible: Should be "atmel,<chip>-secumod", "syscon". <chip> can be "sama5d2". - reg: Should contain registers location and length +- gpio-controller: Marks the port as GPIO controller. +- #gpio-cells: There are 2. The pin number is the + first, the second represents additional + parameters such as GPIO_ACTIVE_HIGH/LOW. + secumod@fc040000 { compatible = "atmel,sama5d2-secumod", "syscon"; reg = <0xfc040000 0x100>; + gpio-controller; + #gpio-cells = <2>; }; |