mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
dt-bindings: arm: atmel: describe SECUMOD usage as a GPIO controller
This patch describes the Security Module's usage as a GPIO controller for its PIOBU pins. These pins have the special property of maintaining their voltage during suspend-to-mem. Signed-off-by: Andrei Stefanescu <andrei.stefanescu@microchip.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
parent
89a5e15bcb
commit
6bd925a8b7
@ -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>;
|
||||
};
|
||||
|
Loading…
Reference in New Issue
Block a user