* [PATCH 1/3] clk: samsung: exynos4: Add SSS gate clock
2015-10-19 5:00 [PATCH 0/3] ARM: dts: Enable Exynos RNG module Krzysztof Kozlowski
@ 2015-10-19 5:00 ` Krzysztof Kozlowski
2015-10-19 19:59 ` Stephen Boyd
2015-10-19 5:00 ` [PATCH 2/3] ARM: dts: Add PRNG module for exynos4 Krzysztof Kozlowski
` (2 subsequent siblings)
3 siblings, 1 reply; 10+ messages in thread
From: Krzysztof Kozlowski @ 2015-10-19 5:00 UTC (permalink / raw)
To: Kukjin Kim, Krzysztof Kozlowski, Sylwester Nawrocki, Tomasz Figa,
Michael Turquette, Stephen Boyd, devicetree, linux-arm-kernel,
linux-samsung-soc, linux-kernel, linux-clk, Matt Mackall,
Herbert Xu, linux-crypto
Cc: Heiner Kallweit
Add a gate clock for controlling all clocks of Security Sub System
(SSS).
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
---
drivers/clk/samsung/clk-exynos4.c | 1 +
include/dt-bindings/clock/exynos4.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/clk/samsung/clk-exynos4.c b/drivers/clk/samsung/clk-exynos4.c
index 7f370d3e0983..ac03e4fe2871 100644
--- a/drivers/clk/samsung/clk-exynos4.c
+++ b/drivers/clk/samsung/clk-exynos4.c
@@ -1024,6 +1024,7 @@ static struct samsung_gate_clock exynos4_gate_clks[] __initdata = {
0, 0),
GATE(CLK_AC97, "ac97", "aclk100", GATE_IP_PERIL, 27,
0, 0),
+ GATE(CLK_SSS, "sss", "aclk133", GATE_IP_DMC, 4, 0, 0),
GATE(CLK_PPMUDMC0, "ppmudmc0", "aclk133", GATE_IP_DMC, 8, 0, 0),
GATE(CLK_PPMUDMC1, "ppmudmc1", "aclk133", GATE_IP_DMC, 9, 0, 0),
GATE(CLK_PPMUCPU, "ppmucpu", "aclk133", GATE_IP_DMC, 10, 0, 0),
diff --git a/include/dt-bindings/clock/exynos4.h b/include/dt-bindings/clock/exynos4.h
index c4b1676ea674..c40111f36d5e 100644
--- a/include/dt-bindings/clock/exynos4.h
+++ b/include/dt-bindings/clock/exynos4.h
@@ -93,6 +93,7 @@
#define CLK_SCLK_FIMG2D 177
/* gate clocks */
+#define CLK_SSS 255
#define CLK_FIMC0 256
#define CLK_FIMC1 257
#define CLK_FIMC2 258
--
1.9.1
^ permalink raw reply related [flat|nested] 10+ messages in thread
* Re: [PATCH 1/3] clk: samsung: exynos4: Add SSS gate clock
2015-10-19 5:00 ` [PATCH 1/3] clk: samsung: exynos4: Add SSS gate clock Krzysztof Kozlowski
@ 2015-10-19 19:59 ` Stephen Boyd
2015-10-19 23:51 ` Krzysztof Kozlowski
0 siblings, 1 reply; 10+ messages in thread
From: Stephen Boyd @ 2015-10-19 19:59 UTC (permalink / raw)
To: Krzysztof Kozlowski
Cc: Kukjin Kim, Sylwester Nawrocki, Tomasz Figa, Michael Turquette,
devicetree, linux-arm-kernel, linux-samsung-soc, linux-kernel,
linux-clk, Matt Mackall, Herbert Xu, linux-crypto,
Heiner Kallweit
On 10/19, Krzysztof Kozlowski wrote:
> Add a gate clock for controlling all clocks of Security Sub System
> (SSS).
>
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> ---
The To: list is huge, so I have no idea if you want me to apply
this patch or not, and given that it's part of a series that has
dts changes I guess that means it should go through arm-soc:
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH 1/3] clk: samsung: exynos4: Add SSS gate clock
2015-10-19 19:59 ` Stephen Boyd
@ 2015-10-19 23:51 ` Krzysztof Kozlowski
0 siblings, 0 replies; 10+ messages in thread
From: Krzysztof Kozlowski @ 2015-10-19 23:51 UTC (permalink / raw)
To: Stephen Boyd
Cc: Kukjin Kim, Sylwester Nawrocki, Tomasz Figa, Michael Turquette,
devicetree, linux-arm-kernel, linux-samsung-soc, linux-kernel,
linux-clk, Matt Mackall, Herbert Xu, linux-crypto,
Heiner Kallweit
On 20.10.2015 04:59, Stephen Boyd wrote:
> On 10/19, Krzysztof Kozlowski wrote:
>> Add a gate clock for controlling all clocks of Security Sub System
>> (SSS).
>>
>> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
>> ---
>
> The To: list is huge, so I have no idea if you want me to apply
> this patch or not, and given that it's part of a series that has
> dts changes I guess that means it should go through arm-soc:
>
> Acked-by: Stephen Boyd <sboyd@codeaurora.org>
If you are OK with that I would like to push it through arm-soc. Thanks
for the ack!
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH 2/3] ARM: dts: Add PRNG module for exynos4
2015-10-19 5:00 [PATCH 0/3] ARM: dts: Enable Exynos RNG module Krzysztof Kozlowski
2015-10-19 5:00 ` [PATCH 1/3] clk: samsung: exynos4: Add SSS gate clock Krzysztof Kozlowski
@ 2015-10-19 5:00 ` Krzysztof Kozlowski
2015-10-19 5:00 ` [PATCH 3/3] ARM: dts: Enable PRNG module on exynos4412-trats2 Krzysztof Kozlowski
2015-10-19 16:11 ` [PATCH 0/3] ARM: dts: Enable Exynos RNG module Tobias Jakobi
3 siblings, 0 replies; 10+ messages in thread
From: Krzysztof Kozlowski @ 2015-10-19 5:00 UTC (permalink / raw)
To: Kukjin Kim, Krzysztof Kozlowski, Sylwester Nawrocki, Tomasz Figa,
Michael Turquette, Stephen Boyd, devicetree, linux-arm-kernel,
linux-samsung-soc, linux-kernel, linux-clk, Matt Mackall,
Herbert Xu, linux-crypto
Cc: Heiner Kallweit
Add Pseudo Random Number Generator (PRNG) node of Security Sub System
(SSS) to Exynos 4 DTSI.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
---
arch/arm/boot/dts/exynos4.dtsi | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/arm/boot/dts/exynos4.dtsi b/arch/arm/boot/dts/exynos4.dtsi
index 3184e10f260a..a6b9913ea2b5 100644
--- a/arch/arm/boot/dts/exynos4.dtsi
+++ b/arch/arm/boot/dts/exynos4.dtsi
@@ -954,4 +954,12 @@
power-domains = <&pd_lcd0>;
#iommu-cells = <0>;
};
+
+ prng: rng@10830400 {
+ compatible = "samsung,exynos4-rng";
+ reg = <0x10830400 0x200>;
+ clocks = <&clock CLK_SSS>;
+ clock-names = "secss";
+ status = "disabled";
+ };
};
--
1.9.1
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH 3/3] ARM: dts: Enable PRNG module on exynos4412-trats2
2015-10-19 5:00 [PATCH 0/3] ARM: dts: Enable Exynos RNG module Krzysztof Kozlowski
2015-10-19 5:00 ` [PATCH 1/3] clk: samsung: exynos4: Add SSS gate clock Krzysztof Kozlowski
2015-10-19 5:00 ` [PATCH 2/3] ARM: dts: Add PRNG module for exynos4 Krzysztof Kozlowski
@ 2015-10-19 5:00 ` Krzysztof Kozlowski
2015-10-19 16:11 ` [PATCH 0/3] ARM: dts: Enable Exynos RNG module Tobias Jakobi
3 siblings, 0 replies; 10+ messages in thread
From: Krzysztof Kozlowski @ 2015-10-19 5:00 UTC (permalink / raw)
To: Kukjin Kim, Krzysztof Kozlowski, Sylwester Nawrocki, Tomasz Figa,
Michael Turquette, Stephen Boyd, devicetree, linux-arm-kernel,
linux-samsung-soc, linux-kernel, linux-clk, Matt Mackall,
Herbert Xu, linux-crypto
Cc: Heiner Kallweit
Enable Pseudo Random Number Generator (PRNG) on Trats2 board. This
allows using hardware random number generator:
$ echo exynos > /sys/class/misc/hw_random/rng_current
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
---
arch/arm/boot/dts/exynos4412-trats2.dts | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm/boot/dts/exynos4412-trats2.dts b/arch/arm/boot/dts/exynos4412-trats2.dts
index 40a474c4374b..a6f78c3da935 100644
--- a/arch/arm/boot/dts/exynos4412-trats2.dts
+++ b/arch/arm/boot/dts/exynos4412-trats2.dts
@@ -1234,6 +1234,10 @@
status = "okay";
};
+&prng {
+ status = "okay";
+};
+
&rtc {
status = "okay";
clocks = <&clock CLK_RTC>, <&max77686 MAX77686_CLK_AP>;
--
1.9.1
^ permalink raw reply related [flat|nested] 10+ messages in thread
* Re: [PATCH 0/3] ARM: dts: Enable Exynos RNG module
2015-10-19 5:00 [PATCH 0/3] ARM: dts: Enable Exynos RNG module Krzysztof Kozlowski
` (2 preceding siblings ...)
2015-10-19 5:00 ` [PATCH 3/3] ARM: dts: Enable PRNG module on exynos4412-trats2 Krzysztof Kozlowski
@ 2015-10-19 16:11 ` Tobias Jakobi
2015-10-19 23:50 ` Krzysztof Kozlowski
3 siblings, 1 reply; 10+ messages in thread
From: Tobias Jakobi @ 2015-10-19 16:11 UTC (permalink / raw)
To: Krzysztof Kozlowski, Kukjin Kim, Sylwester Nawrocki, Tomasz Figa,
Michael Turquette, Stephen Boyd, devicetree, linux-arm-kernel,
linux-samsung-soc, linux-kernel, linux-clk, Matt Mackall,
Herbert Xu, linux-crypto
Cc: Heiner Kallweit
Hello Krzysztof,
I can confirm that this also works on a Odroid-X2, so I guess it's safe
to enable the PRNG for all Exynos4412-based Odroid devices.
Any chance that you might also take a look at the other hwcrypto stuff
on the SoC ('samsung,exynos4210-secss' compatible)?
With best wishes,
Tobias
Krzysztof Kozlowski wrote:
> Hi,
>
>
> The patchset adds necessary clock from Security SubSystem (SSS)
> and enables the PRNG module of Exynos for Trats2 board.
>
> The first patch (clock) is required for other ones so please
> take everything in one step.
>
> The actual Device Tree support (and compatible) was sent in separate
> patch:
> - https://patchwork.kernel.org/patch/7432891/
> - http://marc.info/?l=linux-crypto-vger&m=144522952725052&w=2
>
> The device can be tested (after applying both patchsets) with:
> $ echo exynos > /sys/class/misc/hw_random/rng_current
> $ dd if=/dev/hwrng of=/dev/null bs=1 count=16
>
>
> Best regards,
> Krzysztof
>
> Krzysztof Kozlowski (3):
> clk: samsung: exynos4: Add SSS gate clock
> ARM: dts: Add PRNG module for exynos4
> ARM: dts: Enable PRNG module on exynos4412-trats2
>
> arch/arm/boot/dts/exynos4.dtsi | 8 ++++++++
> arch/arm/boot/dts/exynos4412-trats2.dts | 4 ++++
> drivers/clk/samsung/clk-exynos4.c | 1 +
> include/dt-bindings/clock/exynos4.h | 1 +
> 4 files changed, 14 insertions(+)
>
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH 0/3] ARM: dts: Enable Exynos RNG module
2015-10-19 16:11 ` [PATCH 0/3] ARM: dts: Enable Exynos RNG module Tobias Jakobi
@ 2015-10-19 23:50 ` Krzysztof Kozlowski
2015-10-24 23:58 ` Tobias Jakobi
0 siblings, 1 reply; 10+ messages in thread
From: Krzysztof Kozlowski @ 2015-10-19 23:50 UTC (permalink / raw)
To: Tobias Jakobi, Kukjin Kim, Sylwester Nawrocki, Tomasz Figa,
Michael Turquette, Stephen Boyd, devicetree, linux-arm-kernel,
linux-samsung-soc, linux-kernel, linux-clk, Matt Mackall,
Herbert Xu, linux-crypto
Cc: Heiner Kallweit
On 20.10.2015 01:11, Tobias Jakobi wrote:
> Hello Krzysztof,
>
> I can confirm that this also works on a Odroid-X2, so I guess it's safe
> to enable the PRNG for all Exynos4412-based Odroid devices.
Sure, I can send a patch for that. I can test it later also on Odroid-U3.
>
> Any chance that you might also take a look at the other hwcrypto stuff
> on the SoC ('samsung,exynos4210-secss' compatible)?
What do you mean? The s5p-sss driver already supports Device Tree.
Best regards,
Krzysztof
>
> With best wishes,
> Tobias
>
>
> Krzysztof Kozlowski wrote:
>> Hi,
>>
>>
>> The patchset adds necessary clock from Security SubSystem (SSS)
>> and enables the PRNG module of Exynos for Trats2 board.
>>
>> The first patch (clock) is required for other ones so please
>> take everything in one step.
>>
>> The actual Device Tree support (and compatible) was sent in separate
>> patch:
>> - https://patchwork.kernel.org/patch/7432891/
>> - http://marc.info/?l=linux-crypto-vger&m=144522952725052&w=2
>>
>> The device can be tested (after applying both patchsets) with:
>> $ echo exynos > /sys/class/misc/hw_random/rng_current
>> $ dd if=/dev/hwrng of=/dev/null bs=1 count=16
>>
>>
>> Best regards,
>> Krzysztof
>>
>> Krzysztof Kozlowski (3):
>> clk: samsung: exynos4: Add SSS gate clock
>> ARM: dts: Add PRNG module for exynos4
>> ARM: dts: Enable PRNG module on exynos4412-trats2
>>
>> arch/arm/boot/dts/exynos4.dtsi | 8 ++++++++
>> arch/arm/boot/dts/exynos4412-trats2.dts | 4 ++++
>> drivers/clk/samsung/clk-exynos4.c | 1 +
>> include/dt-bindings/clock/exynos4.h | 1 +
>> 4 files changed, 14 insertions(+)
>>
>
>
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH 0/3] ARM: dts: Enable Exynos RNG module
2015-10-19 23:50 ` Krzysztof Kozlowski
@ 2015-10-24 23:58 ` Tobias Jakobi
2015-10-29 6:24 ` Krzysztof Kozlowski
0 siblings, 1 reply; 10+ messages in thread
From: Tobias Jakobi @ 2015-10-24 23:58 UTC (permalink / raw)
To: Krzysztof Kozlowski, Kukjin Kim, Sylwester Nawrocki, Tomasz Figa,
Michael Turquette, Stephen Boyd, devicetree, linux-arm-kernel,
linux-samsung-soc, linux-kernel, linux-clk, Matt Mackall,
Herbert Xu, linux-crypto
Cc: Heiner Kallweit
Hello Krzysztof,
Krzysztof Kozlowski wrote:
> On 20.10.2015 01:11, Tobias Jakobi wrote:
>> Hello Krzysztof,
>>
>> I can confirm that this also works on a Odroid-X2, so I guess it's safe
>> to enable the PRNG for all Exynos4412-based Odroid devices.
>
> Sure, I can send a patch for that. I can test it later also on Odroid-U3.
Thanks already!
>> Any chance that you might also take a look at the other hwcrypto stuff
>> on the SoC ('samsung,exynos4210-secss' compatible)?
>
> What do you mean? The s5p-sss driver already supports Device Tree.
The driver supports DT, but it doesn't really work.
I'm using the following DT entry to let the driver probe correctly:
https://github.com/tobiasjakobi/linux-odroid/commit/82c00cddb5cbf89fad994784c28c8125beae8e13
But the crypto self-test fails on boot:
alg: skcipher: encryption failed on test 1 for ecb-aes-s5p: ret=22
Another problems is that SSS and PRNG can't be used at the same time,
since they both use common hardware resources (I think it was IO).
With best wishes,
Tobias
> Best regards,
> Krzysztof
>
>>
>> With best wishes,
>> Tobias
>>
>>
>> Krzysztof Kozlowski wrote:
>>> Hi,
>>>
>>>
>>> The patchset adds necessary clock from Security SubSystem (SSS)
>>> and enables the PRNG module of Exynos for Trats2 board.
>>>
>>> The first patch (clock) is required for other ones so please
>>> take everything in one step.
>>>
>>> The actual Device Tree support (and compatible) was sent in separate
>>> patch:
>>> - https://patchwork.kernel.org/patch/7432891/
>>> - http://marc.info/?l=linux-crypto-vger&m=144522952725052&w=2
>>>
>>> The device can be tested (after applying both patchsets) with:
>>> $ echo exynos > /sys/class/misc/hw_random/rng_current
>>> $ dd if=/dev/hwrng of=/dev/null bs=1 count=16
>>>
>>>
>>> Best regards,
>>> Krzysztof
>>>
>>> Krzysztof Kozlowski (3):
>>> clk: samsung: exynos4: Add SSS gate clock
>>> ARM: dts: Add PRNG module for exynos4
>>> ARM: dts: Enable PRNG module on exynos4412-trats2
>>>
>>> arch/arm/boot/dts/exynos4.dtsi | 8 ++++++++
>>> arch/arm/boot/dts/exynos4412-trats2.dts | 4 ++++
>>> drivers/clk/samsung/clk-exynos4.c | 1 +
>>> include/dt-bindings/clock/exynos4.h | 1 +
>>> 4 files changed, 14 insertions(+)
>>>
>>
>>
>
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH 0/3] ARM: dts: Enable Exynos RNG module
2015-10-24 23:58 ` Tobias Jakobi
@ 2015-10-29 6:24 ` Krzysztof Kozlowski
0 siblings, 0 replies; 10+ messages in thread
From: Krzysztof Kozlowski @ 2015-10-29 6:24 UTC (permalink / raw)
To: Tobias Jakobi, Kukjin Kim, Sylwester Nawrocki, Tomasz Figa,
Michael Turquette, Stephen Boyd, devicetree, linux-arm-kernel,
linux-samsung-soc, linux-kernel, linux-clk, Matt Mackall,
Herbert Xu, linux-crypto
Cc: Heiner Kallweit
On 25.10.2015 08:58, Tobias Jakobi wrote:
> Hello Krzysztof,
>
>
> Krzysztof Kozlowski wrote:
>> On 20.10.2015 01:11, Tobias Jakobi wrote:
>>> Hello Krzysztof,
>>>
>>> I can confirm that this also works on a Odroid-X2, so I guess it's safe
>>> to enable the PRNG for all Exynos4412-based Odroid devices.
>>
>> Sure, I can send a patch for that. I can test it later also on Odroid-U3.
> Thanks already!
>
>
>
>>> Any chance that you might also take a look at the other hwcrypto stuff
>>> on the SoC ('samsung,exynos4210-secss' compatible)?
>>
>> What do you mean? The s5p-sss driver already supports Device Tree.
> The driver supports DT, but it doesn't really work.
>
> I'm using the following DT entry to let the driver probe correctly:
> https://github.com/tobiasjakobi/linux-odroid/commit/82c00cddb5cbf89fad994784c28c8125beae8e13
>
> But the crypto self-test fails on boot:
> alg: skcipher: encryption failed on test 1 for ecb-aes-s5p: ret=22
>
>
> Another problems is that SSS and PRNG can't be used at the same time,
> since they both use common hardware resources (I think it was IO).
>
Thanks for explaining this. I added the issue to the long TODO list but
I don't know when I will be able to dig into this.
If anyone wants to look into this, please go ahead...
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 10+ messages in thread