From patchwork Tue Aug 23 00:11:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Davis X-Patchwork-Id: 12951553 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 873C5C28D13 for ; Tue, 23 Aug 2022 00:13:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=LxibSmC0f3fmczRi6FUYunC7a1l5dyxh65s8lT3ekwA=; b=v1MqMV9O58jRfY pDL0xPUeYAlNEPwrUncESyinm80CZkOnuIEhx3Uy/gqgrlfZRl5B14R6pugAq41EC2SgD7brDOvzg r0AnFc0AISTOVXmM568WjFBRSEeVv/W+TgTJwmWbirkbwaj9tnkYdlTiHMY5VTdxxpGG0C/FIPVwD MpkTIyE3sSzGAaDFQm4KQtnwoJm/z6qfSVMJZ3pEWTp5L+giTKwcyvrEc1e3/4Iy33aF31bECJcAV u6tQX3J7AljpUcW6THuRkz2Gvs1T1FzZKp6K98IuNjdHbr1cBR13RJqdWIc1fzRl8YsktChEKvuDO UtM12zFHkj3xNWPlZCvw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oQHX1-00GP6q-BG; Tue, 23 Aug 2022 00:12:36 +0000 Received: from fllv0015.ext.ti.com ([198.47.19.141]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oQHWD-00GOcZ-FN for linux-arm-kernel@lists.infradead.org; Tue, 23 Aug 2022 00:11:47 +0000 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 27N0BeVm083347; Mon, 22 Aug 2022 19:11:40 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1661213500; bh=qxeSPO+3B9CcL9g7SuEglmXUU0e/LxxxpP16g6lMyUE=; h=From:To:CC:Subject:Date; b=w5+JZ85rHYbvrz5k8AG/LrgSpk+AdmP+/gtCVS1qNaDtZNOX9zRubYJ93RlC4ckZp Ytk0QZiT4nGnyWdbupeT0jOyR8DCC+vi1m4PgnqjqAU7YHi0pXR+KeEq9WS1DOv+j9 Xba3FqL7cjgux7dgbRR9evJwqBNEpr9OyzRcdbPI= Received: from DFLE113.ent.ti.com (dfle113.ent.ti.com [10.64.6.34]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 27N0BeCO036197 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 22 Aug 2022 19:11:40 -0500 Received: from DFLE114.ent.ti.com (10.64.6.35) by DFLE113.ent.ti.com (10.64.6.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.6; Mon, 22 Aug 2022 19:11:40 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.6 via Frontend Transport; Mon, 22 Aug 2022 19:11:39 -0500 Received: from ula0226330.dal.design.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 27N0Bdmu062158; Mon, 22 Aug 2022 19:11:39 -0500 From: Andrew Davis To: Nishanth Menon , Vignesh Raghavendra , Tero Kristo , Rob Herring , Krzysztof Kozlowski , , , CC: Andrew Davis Subject: [PATCH v2 1/4] arm64: dts: ti: k3-am65-main: Disable RNG node Date: Mon, 22 Aug 2022 19:11:33 -0500 Message-ID: <20220823001136.10944-1-afd@ti.com> X-Mailer: git-send-email 2.36.1 MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220822_171145_828582_B7E7DE07 X-CRM114-Status: GOOD ( 12.89 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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. We could remove this node, but it is still valid device description, and it is possible it could be re-enabled in the bootloader if OP-TEE is not used. So only disable this node for now. Signed-off-by: Andrew Davis Reviewed-by: Jayesh Choudhary --- Changes from v1: - Added comment in DT - Explained why it is only disabled in commit message 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 8919fede3cd7..b3e714e1abed 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 = ; clocks = <&k3_clks 136 1>; + status = "disabled"; /* Used by OP-TEE */ }; };