| Message ID | 1544615784-29331-2-git-send-email-andrei.stefanescu@microchip.com |
|---|---|
| State | New |
| Headers | show |
| Series | add SAMA5D2 PIOBU GPIO driver | expand |
On Wed, 12 Dec 2018 11:57:11 +0000, <Andrei.Stefanescu@microchip.com> wrote: > 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> > --- > Documentation/devicetree/bindings/arm/atmel-sysregs.txt | 12 +++++++++++- > 1 file changed, 11 insertions(+), 1 deletion(-) > Reviewed-by: Rob Herring <robh@kernel.org>
On Wed, Dec 12, 2018 at 12:57 PM <Andrei.Stefanescu@microchip.com> wrote: > 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> Patch applied with Rob's ACK. Yours, Linus Walleij
diff --git a/Documentation/devicetree/bindings/arm/atmel-sysregs.txt b/Documentation/devicetree/bindings/arm/atmel-sysregs.txt index 4b96608..c89db84 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>; };
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> --- Documentation/devicetree/bindings/arm/atmel-sysregs.txt | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)