[PATCH 0/5] Atmel sama5d2 security module support

[PATCH 0/5] Atmel sama5d2 security module support

[Alexandre Belloni]

Hi,

There has already been multiple tentatives trying to add support for the
Sama5d2 security module and in particular, access to its SRAM.
After multiple discussions, I believe adding support in the sram
driver/framework is probably the best because it allows exporting the
SRAM to the kernel, to userspace and also to run code from it.

As the support for the sama5d2 securam is fairly small, I've included it
directly in the mmio-sram driver.

Regards,

Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
Cc: Philipp Zabel <p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Cc: Vladimir Zapolskiy <vladimir_zapolskiy-nmGgyN9QBj3QT0dZR+AlfA@public.gmane.org>

Alexandre Belloni (5):
  Documentation: dt: atmel-at91: Document secumod bindings
  ARM: dts: at91: sama5d2: Add secumod node
  ARM: at91: add secumod register definitions
  misc: sram: document new compatible
  misc: sram: add Atmel securam support

 .../devicetree/bindings/arm/atmel-at91.txt         | 17 +++++++
 Documentation/devicetree/bindings/sram/sram.txt    |  2 +-
 arch/arm/boot/dts/sama5d2.dtsi                     | 19 ++++++++
 drivers/misc/sram.c                                | 52 +++++++++++++++++++---
 include/soc/at91/atmel-secumod.h                   | 46 +++++++++++++++++++
 5 files changed, 128 insertions(+), 8 deletions(-)
 create mode 100644 include/soc/at91/atmel-secumod.h

-- 
2.9.3

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[PATCH 1/5] Documentation: dt: atmel-at91: Document secumod bindings

[Alexandre Belloni]

A security module is available starting with sama5d2, add its bindings.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
 Documentation/devicetree/bindings/arm/atmel-at91.txt | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt
index e1f5ad855f14..eea1f44d5666 100644
--- a/Documentation/devicetree/bindings/arm/atmel-at91.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt
@@ -225,3 +225,20 @@ required properties:
 		compatible = "atmel,sama5d3-sfr", "syscon";
 		reg = <0xf0038000 0x60>;
 	};
+
+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
+
+required properties:
+- compatible: Should be "atmel,<chip>-secumod", "syscon".
+  <chip> can be "sama5d2".
+- reg: Should contain registers location and length
+
+	secumod@fc040000 {
+		compatible = "atmel,sama5d2-secumod", "syscon";
+		reg = <0xfc040000 0x100>;
+	};
+
-- 
2.9.3

Re: [PATCH 1/5] Documentation: dt: atmel-at91: Document secumod bindings

[Rob Herring]

On Wed, Aug 31, 2016 at 06:11:04PM +0200, Alexandre Belloni wrote:
> A security module is available starting with sama5d2, add its bindings.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
> ---
> Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
>  Documentation/devicetree/bindings/arm/atmel-at91.txt | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)

Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
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[PATCH 4/5] misc: sram: document new compatible

[Alexandre Belloni]

Add atmel,sama5d2-securam to the compatible list.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
 Documentation/devicetree/bindings/sram/sram.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/sram/sram.txt b/Documentation/devicetree/bindings/sram/sram.txt
index add48f09015e..068c2c03c38f 100644
--- a/Documentation/devicetree/bindings/sram/sram.txt
+++ b/Documentation/devicetree/bindings/sram/sram.txt
@@ -4,7 +4,7 @@ Simple IO memory regions to be managed by the genalloc API.
 
 Required properties:
 
-- compatible : mmio-sram
+- compatible : mmio-sram or atmel,sama5d2-securam
 
 - reg : SRAM iomem address range
 
-- 
2.9.3

Re: [PATCH 4/5] misc: sram: document new compatible

[Rob Herring]

On Wed, Aug 31, 2016 at 06:11:07PM +0200, Alexandre Belloni wrote:
> Add atmel,sama5d2-securam to the compatible list.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
> ---
> Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
>  Documentation/devicetree/bindings/sram/sram.txt | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
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