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From: Andrew Davis <afd@ti.com>
To: Nishanth Menon <nm@ti.com>, Vignesh Raghavendra <vigneshr@ti.com>,
	Tero Kristo <kristo@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: Andrew Davis <afd@ti.com>
Subject: [PATCH v2 1/4] arm64: dts: ti: k3-am65-main: Disable RNG node
Date: Wed, 6 Jul 2022 14:08:35 -0500	[thread overview]
Message-ID: <20220706190838.26074-1-afd@ti.com> (raw)

The hardware random number generator is used by OP-TEE and is access is
denied to other users with SoC level bus firewalls. Any access to this
device from Linux will result in firewall errors. Disable this node.

Signed-off-by: Andrew Davis <afd@ti.com>
---

Changes from v1:
 - Added comment in dtsi file

 arch/arm64/boot/dts/ti/k3-am65-main.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
index e749343accedd..9de5a8294acd6 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
@@ -127,6 +127,7 @@ rng: rng@4e10000 {
 			reg = <0x0 0x4e10000 0x0 0x7d>;
 			interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&k3_clks 136 1>;
+			status = "disabled"; /* Used by OP-TEE */
 		};
 	};
 
-- 
2.36.1


WARNING: multiple messages have this Message-ID (diff)
From: Andrew Davis <afd@ti.com>
To: Nishanth Menon <nm@ti.com>, Vignesh Raghavendra <vigneshr@ti.com>,
	Tero Kristo <kristo@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: Andrew Davis <afd@ti.com>
Subject: [PATCH v2 1/4] arm64: dts: ti: k3-am65-main: Disable RNG node
Date: Wed, 6 Jul 2022 14:08:35 -0500	[thread overview]
Message-ID: <20220706190838.26074-1-afd@ti.com> (raw)

The hardware random number generator is used by OP-TEE and is access is
denied to other users with SoC level bus firewalls. Any access to this
device from Linux will result in firewall errors. Disable this node.

Signed-off-by: Andrew Davis <afd@ti.com>
---

Changes from v1:
 - Added comment in dtsi file

 arch/arm64/boot/dts/ti/k3-am65-main.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
index e749343accedd..9de5a8294acd6 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
@@ -127,6 +127,7 @@ rng: rng@4e10000 {
 			reg = <0x0 0x4e10000 0x0 0x7d>;
 			interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&k3_clks 136 1>;
+			status = "disabled"; /* Used by OP-TEE */
 		};
 	};
 
-- 
2.36.1


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             reply	other threads:[~2022-07-06 19:08 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-06 19:08 Andrew Davis [this message]
2022-07-06 19:08 ` [PATCH v2 1/4] arm64: dts: ti: k3-am65-main: Disable RNG node Andrew Davis
2022-07-06 19:08 ` [PATCH v2 2/4] arm64: dts: ti: k3-am65-main: Move SA2UL to unused PSI-L thread ID Andrew Davis
2022-07-06 19:08   ` Andrew Davis
2022-07-06 19:08 ` [PATCH v2 3/4] arm64: dts: ti: k3-am65-main: Do not exclusively claim SA2UL Andrew Davis
2022-07-06 19:08   ` Andrew Davis
2022-07-06 19:08 ` [PATCH v2 4/4] arm64: dts: ti: k3-j7200-mcu-wakeup: Add SA2UL node Andrew Davis
2022-07-06 19:08   ` Andrew Davis
2022-07-07 14:44 ` [PATCH v2 1/4] arm64: dts: ti: k3-am65-main: Disable RNG node Bryan Brattlof
2022-07-07 14:44   ` Bryan Brattlof
2022-07-07 15:01   ` Andrew Davis
2022-07-07 15:01     ` Andrew Davis
2022-07-07 17:17     ` Nishanth Menon
2022-07-07 17:17       ` Nishanth Menon
2022-07-07 17:36       ` Andrew Davis
2022-07-07 17:36         ` Andrew Davis
2022-07-08 22:09         ` Nishanth Menon
2022-07-08 22:09           ` Nishanth Menon
2022-08-23  0:11 Andrew Davis
2022-08-23  0:11 ` Andrew Davis
2022-08-30  9:54 ` Jayesh Choudhary
2022-08-30  9:54   ` Jayesh Choudhary
2022-09-09  9:56 ` Vignesh Raghavendra
2022-09-09  9:56   ` Vignesh Raghavendra

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