From patchwork Tue Jan 14 03:45:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingyu Chen X-Patchwork-Id: 11331257 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3AD1892A for ; Tue, 14 Jan 2020 03:46:10 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 156D3207FD for ; Tue, 14 Jan 2020 03:46:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="NwkHwe91" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 156D3207FD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=amlogic.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=8BAmH2b+Yks31kzHJ34fLpiCZGkEG3w7WjdUy/a9DAM=; b=NwkHwe91I8yh/B 9p18r5OvqG1dqbQ6/XvTvyPbMRYczkk8tzjWcV0HXIzlnZ2HmbmlLyLjgJaF7RpbR7w60kAVppQnx dtFeQV20sPT3s3E4MMRjoKa5enNYfmD9xus41OwkkFnqa4kyNQEtZkF+ShZKIOLZpykwrNRMPLXK6 Ii3hm8RwNH9TgF7if0RRW3PpPYhqmuKbcIFJvWxroaFVtUroiTkz4pSEOm9+FpJffo2P++xp9lS5c XcGjI1GmqCEjyedZhud2CFAEAxS6zgScr7cUoePnJxVdLOHuq4AYwmRDUkTKiAUBLLHZA3GnH1SNd GilLTNnb+ZbU3gbeFWuA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1irD9c-0000s6-Ec; Tue, 14 Jan 2020 03:46:08 +0000 Received: from mail-sz.amlogic.com ([211.162.65.117]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1irD9I-0000ZK-6w; Tue, 14 Jan 2020 03:45:49 +0000 Received: from droid12-sz.software.amlogic (10.28.8.22) by mail-sz.amlogic.com (10.28.11.5) with Microsoft SMTP Server id 15.1.1591.10; Tue, 14 Jan 2020 11:45:58 +0800 From: Xingyu Chen To: Wim Van Sebroeck , Guenter Roeck , Kevin Hilman , Neil Armstrong Subject: [PATCH v6 1/5] firmware: meson_sm: add new SMC ID support for accessing secure watchdog Date: Tue, 14 Jan 2020 11:45:23 +0800 Message-ID: <1578973527-4759-2-git-send-email-xingyu.chen@amlogic.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1578973527-4759-1-git-send-email-xingyu.chen@amlogic.com> References: <1578973527-4759-1-git-send-email-xingyu.chen@amlogic.com> MIME-Version: 1.0 X-Originating-IP: [10.28.8.22] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200113_194548_252331_BDCB99EE X-CRM114-Status: UNSURE ( 8.09 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Qianggui Song , linux-watchdog@vger.kernel.org, Jianxin Pan , Martin Blumenstingl , linux-kernel@vger.kernel.org, Rob Herring , Jian Hu , linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, Xingyu Chen , Jerome Brunet Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The new SMC ID is used to access secure registers by meson secure watchdog driver. Signed-off-by: Xingyu Chen --- drivers/firmware/meson/meson_sm.c | 1 + include/linux/firmware/meson/meson_sm.h | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/firmware/meson/meson_sm.c b/drivers/firmware/meson/meson_sm.c index 1d5b4d7..8cdd405 100644 --- a/drivers/firmware/meson/meson_sm.c +++ b/drivers/firmware/meson/meson_sm.c @@ -44,6 +44,7 @@ static const struct meson_sm_chip gxbb_chip = { CMD(SM_EFUSE_WRITE, 0x82000031), CMD(SM_EFUSE_USER_MAX, 0x82000033), CMD(SM_GET_CHIP_ID, 0x82000044), + CMD(SM_A1_WATCHDOG_OPS, 0x82000086), { /* sentinel */ }, }, }; diff --git a/include/linux/firmware/meson/meson_sm.h b/include/linux/firmware/meson/meson_sm.h index 6669e2a..9ef1524 100644 --- a/include/linux/firmware/meson/meson_sm.h +++ b/include/linux/firmware/meson/meson_sm.h @@ -12,6 +12,7 @@ enum { SM_EFUSE_WRITE, SM_EFUSE_USER_MAX, SM_GET_CHIP_ID, + SM_A1_WATCHDOG_OPS, }; struct meson_sm_firmware; From patchwork Tue Jan 14 03:45:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingyu Chen X-Patchwork-Id: 11331263 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4A24E139A for ; Tue, 14 Jan 2020 03:46:34 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 25CE62084D for ; Tue, 14 Jan 2020 03:46:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="aVzYjDkS" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 25CE62084D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=amlogic.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=h3fX1B9T9OqJ5PWRmp0Mf6orHTWupE6B4GRezuTLVGw=; b=aVzYjDkSUhnLzQ 4AOK8NGXYa87SSvLippcsxSo3bGrCXBysjd9AMqalJPq2+Spyvip0HwMPmRXrzt49OzQ4v52V2QyT /SQt4oDz51Ec55XkNzEQmrPrdSVmBhrtVGRUykE81IdS1ukncBVTDQmfCfIYo/EiEPSJ8/UNDBcSC QiWZxx6hcj3DN3zY6pOpg9wiwKB1CHDGkNj6T3uu8PmCc2RHiGM/e7EpxEyQDqN4ZJZBr0FjdQlgb dI+ugSiYceH7EAAsaixMAjT4QbCZLeTA4/SVLDpDIgEZksrGbZXc16W1kiuvsK7XIL1sJ0jRKBSCD 2sROQ+Bm8jnAfb56FNdA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1irD9z-0001DU-Kq; Tue, 14 Jan 2020 03:46:31 +0000 Received: from mail-sz.amlogic.com ([211.162.65.117]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1irD9J-0000ZK-QN; Tue, 14 Jan 2020 03:45:51 +0000 Received: from droid12-sz.software.amlogic (10.28.8.22) by mail-sz.amlogic.com (10.28.11.5) with Microsoft SMTP Server id 15.1.1591.10; Tue, 14 Jan 2020 11:45:58 +0800 From: Xingyu Chen To: Wim Van Sebroeck , Guenter Roeck , Kevin Hilman , Neil Armstrong Subject: [PATCH v6 2/5] firmware: meson_sm: populate platform device based on the child node Date: Tue, 14 Jan 2020 11:45:24 +0800 Message-ID: <1578973527-4759-3-git-send-email-xingyu.chen@amlogic.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1578973527-4759-1-git-send-email-xingyu.chen@amlogic.com> References: <1578973527-4759-1-git-send-email-xingyu.chen@amlogic.com> MIME-Version: 1.0 X-Originating-IP: [10.28.8.22] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200113_194549_872655_CBB578A2 X-CRM114-Status: UNSURE ( 7.47 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Qianggui Song , linux-watchdog@vger.kernel.org, Jianxin Pan , Martin Blumenstingl , linux-kernel@vger.kernel.org, Rob Herring , Jian Hu , linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, Xingyu Chen , Jerome Brunet Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The child node of secure-monitor cann't be populated as platform device automatically during the kernel initialization phase, so we invoke of_platform_default_populate() to do it. Signed-off-by: Xingyu Chen --- drivers/firmware/meson/meson_sm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/firmware/meson/meson_sm.c b/drivers/firmware/meson/meson_sm.c index 8cdd405..d2b1e76 100644 --- a/drivers/firmware/meson/meson_sm.c +++ b/drivers/firmware/meson/meson_sm.c @@ -310,6 +310,8 @@ static int __init meson_sm_probe(struct platform_device *pdev) platform_set_drvdata(pdev, fw); + of_platform_default_populate(dev->of_node, NULL, dev); + pr_info("secure-monitor enabled\n"); if (sysfs_create_group(&pdev->dev.kobj, &meson_sm_sysfs_attr_group)) From patchwork Tue Jan 14 03:45:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingyu Chen X-Patchwork-Id: 11331267 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 94EE292A for ; Tue, 14 Jan 2020 03:46:49 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 6C5872084D for ; Tue, 14 Jan 2020 03:46:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="j2pvcZWD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6C5872084D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=amlogic.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=THTTjiBBM1Nc8vcwdfNZUxS3bGBFJMURpMUoo4O4uCk=; b=j2pvcZWD0ZK0W5 5FyB9npVIPJzNoQ+gpF9P++7uo9Q2aER74m781/Wg8A41lWvN8FjDKU/kfw0tYS8plZcyOTFxaq0P ypiXEYADy/Iot412d8ZTF/my42YQCgdELAMcP1uyx8I7siSiE9yZcWZQ4khHMkKtUimbW3FJotS3K 5pX3H773D2woCC5PW2px4pGHDFFu78uyqrvfGibR4ncFf3ah2X8NJJeNCxo3nxrD8ZnMDgr7kevha YLKNbjOygDckfMeP3ieYXLeu6CTbFHP7irNldAoe2LloM745iXAisP/ZIrJ6JLd6I0mAdm+NmUGjT tpLq16YCFmwDxLVIUYGw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1irDAF-0001TJ-6c; Tue, 14 Jan 2020 03:46:47 +0000 Received: from mail-sz.amlogic.com ([211.162.65.117]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1irD9L-0000ZK-Ib; Tue, 14 Jan 2020 03:45:53 +0000 Received: from droid12-sz.software.amlogic (10.28.8.22) by mail-sz.amlogic.com (10.28.11.5) with Microsoft SMTP Server id 15.1.1591.10; Tue, 14 Jan 2020 11:45:58 +0800 From: Xingyu Chen To: Wim Van Sebroeck , Guenter Roeck , Kevin Hilman , Neil Armstrong Subject: [PATCH v6 3/5] dt-bindings: watchdog: add new binding for meson secure watchdog Date: Tue, 14 Jan 2020 11:45:25 +0800 Message-ID: <1578973527-4759-4-git-send-email-xingyu.chen@amlogic.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1578973527-4759-1-git-send-email-xingyu.chen@amlogic.com> References: <1578973527-4759-1-git-send-email-xingyu.chen@amlogic.com> MIME-Version: 1.0 X-Originating-IP: [10.28.8.22] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200113_194551_639711_3B50593A X-CRM114-Status: UNSURE ( 8.54 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Qianggui Song , devicetree@vger.kernel.org, linux-watchdog@vger.kernel.org, Jianxin Pan , Martin Blumenstingl , linux-kernel@vger.kernel.org, Rob Herring , Jian Hu , linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, Xingyu Chen , Jerome Brunet Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The binding targets the Meson-A/C series compatible SoCs, in which the watchdog registers are in secure world. Signed-off-by: Xingyu Chen Reviewed-by: Rob Herring --- .../bindings/watchdog/amlogic,meson-sec-wdt.yaml | 40 ++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/amlogic,meson-sec-wdt.yaml diff --git a/Documentation/devicetree/bindings/watchdog/amlogic,meson-sec-wdt.yaml b/Documentation/devicetree/bindings/watchdog/amlogic,meson-sec-wdt.yaml new file mode 100644 index 00000000..8e9d62a --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/amlogic,meson-sec-wdt.yaml @@ -0,0 +1,40 @@ +# SPDX-License-Identifier: (GPL-2.0+ OR MIT) +# Copyright (c) 2019 Amlogic, Inc +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/power/amlogic,meson-sec-wdt.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Amlogic Meson Secure Watchdog Timer + +maintainers: + - Xingyu Chen + +description: |+ + Secure Watchdog Timer used in Meson-A/C series Compatible SoCs, + and its device node must be the child node of secure-monitor. + +properties: + compatible: + enum: + - amlogic,meson-sec-wdt + + timeout-sec: + minimum: 1 + maximum: 65 + description: + Watchdog timeout values (in seconds) + +required: + - compatible + +examples: + - | + secure-monitor { + compatible = "amlogic,meson-gxbb-sm"; + + watchdog { + compatible = "amlogic,meson-sec-wdt"; + timeout-sec = <60>; + }; + }; From patchwork Tue Jan 14 03:45:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingyu Chen X-Patchwork-Id: 11331269 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ABE1E139A for ; Tue, 14 Jan 2020 03:47:03 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 89A77214AF for ; Tue, 14 Jan 2020 03:47:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="GNtX+gyU" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 89A77214AF Authentication-Results: mail.kernel.org; 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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1irDAQ-0001hL-K0; Tue, 14 Jan 2020 03:46:58 +0000 Received: from mail-sz.amlogic.com ([211.162.65.117]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1irD9N-0000ZK-JW; Tue, 14 Jan 2020 03:45:55 +0000 Received: from droid12-sz.software.amlogic (10.28.8.22) by mail-sz.amlogic.com (10.28.11.5) with Microsoft SMTP Server id 15.1.1591.10; Tue, 14 Jan 2020 11:45:59 +0800 From: Xingyu Chen To: Wim Van Sebroeck , Guenter Roeck , Kevin Hilman , Neil Armstrong Subject: [PATCH v6 4/5] watchdog: add meson secure watchdog driver Date: Tue, 14 Jan 2020 11:45:26 +0800 Message-ID: <1578973527-4759-5-git-send-email-xingyu.chen@amlogic.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1578973527-4759-1-git-send-email-xingyu.chen@amlogic.com> References: <1578973527-4759-1-git-send-email-xingyu.chen@amlogic.com> MIME-Version: 1.0 X-Originating-IP: [10.28.8.22] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200113_194554_049152_BD77683E X-CRM114-Status: GOOD ( 14.46 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Qianggui Song , linux-watchdog@vger.kernel.org, Jianxin Pan , Martin Blumenstingl , linux-kernel@vger.kernel.org, Rob Herring , Jian Hu , linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, Xingyu Chen , Jerome Brunet Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The watchdog controller on the Meson-A/C series SoCs is moved to secure world, watchdog operation needs to be done in secure EL3 mode via ATF, Non-secure world can call SMC instruction to trap to AFT for watchdog operation. Reviewed-by: Guenter Roeck Signed-off-by: Xingyu Chen --- drivers/watchdog/Kconfig | 16 ++++ drivers/watchdog/Makefile | 1 + drivers/watchdog/meson_sec_wdt.c | 185 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 202 insertions(+) create mode 100644 drivers/watchdog/meson_sec_wdt.c diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 1679e0d..5f88325 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -826,6 +826,22 @@ config MESON_GXBB_WATCHDOG To compile this driver as a module, choose M here: the module will be called meson_gxbb_wdt. +config MESON_SEC_WATCHDOG + tristate "Amlogic Meson Secure watchdog support" + depends on MESON_SM + select WATCHDOG_CORE + help + The watchdog controller on the Meson-A/C series SoCs is moved to + secure world, watchdog operation needs to be done in secure EL3 + mode via ATF, non-secure world can call SMC instruction to trap + to ATF for the watchdog operation. + + Say Y here if watchdog controller on Meson SoCs is located in + secure world. + + To compile this driver as a module, choose M here: the + module will be called meson_sec_wdt. + config MESON_WATCHDOG tristate "Amlogic Meson SoCs watchdog support" depends on ARCH_MESON || COMPILE_TEST diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index 2ee352b..5e6b73d 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -78,6 +78,7 @@ obj-$(CONFIG_QCOM_WDT) += qcom-wdt.o obj-$(CONFIG_BCM_KONA_WDT) += bcm_kona_wdt.o obj-$(CONFIG_TEGRA_WATCHDOG) += tegra_wdt.o obj-$(CONFIG_MESON_GXBB_WATCHDOG) += meson_gxbb_wdt.o +obj-$(CONFIG_MESON_SEC_WATCHDOG) += meson_sec_wdt.o obj-$(CONFIG_MESON_WATCHDOG) += meson_wdt.o obj-$(CONFIG_MEDIATEK_WATCHDOG) += mtk_wdt.o obj-$(CONFIG_DIGICOLOR_WATCHDOG) += digicolor_wdt.o diff --git a/drivers/watchdog/meson_sec_wdt.c b/drivers/watchdog/meson_sec_wdt.c new file mode 100644 index 00000000..493cbe8 --- /dev/null +++ b/drivers/watchdog/meson_sec_wdt.c @@ -0,0 +1,185 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Copyright (c) 2019 Amlogic, Inc. All rights reserved. + * Author: Xingyu Chen + * + */ +#include +#include +#include +#include +#include +#include +#include + +#define MESON_SIP_WDT_DISABLE 0x1 +#define MESON_SIP_WDT_ENABLE 0x2 +#define MESON_SIP_WDT_PING 0x3 +#define MESON_SIP_WDT_INIT 0x4 +#define MESON_SIP_WDT_RESETNOW 0x5 +#define MESON_SIP_WDT_SETTIMEOUT 0x6 +#define MESON_SIP_WDT_GETTIMELEFT 0x7 + +#define DEFAULT_TIMEOUT 30 /* seconds */ + +/* + * Watchdog timer tick is set to 1ms in secfw side, and tick count is + * stored in the bit[16-31] of WATCHDOG_CNT register, so the maximum + * timeout value is 0xffff ms. + */ +#define MAX_TIMEOUT_MS 0xFFFF + +struct meson_sec_wdt { + struct watchdog_device wdt_dev; + struct meson_sm_firmware *fw; +}; + +static int meson_sec_wdt_start(struct watchdog_device *wdt_dev) +{ + struct meson_sec_wdt *data = watchdog_get_drvdata(wdt_dev); + + return meson_sm_call(data->fw, SM_A1_WATCHDOG_OPS, NULL, + MESON_SIP_WDT_ENABLE, 0, 0, 0, 0); +} + +static int meson_sec_wdt_stop(struct watchdog_device *wdt_dev) +{ + struct meson_sec_wdt *data = watchdog_get_drvdata(wdt_dev); + + return meson_sm_call(data->fw, SM_A1_WATCHDOG_OPS, NULL, + MESON_SIP_WDT_DISABLE, 0, 0, 0, 0); +} + +static int meson_sec_wdt_ping(struct watchdog_device *wdt_dev) +{ + struct meson_sec_wdt *data = watchdog_get_drvdata(wdt_dev); + + return meson_sm_call(data->fw, SM_A1_WATCHDOG_OPS, NULL, + MESON_SIP_WDT_PING, 0, 0, 0, 0); +} + +static int meson_sec_wdt_set_timeout(struct watchdog_device *wdt_dev, + unsigned int timeout) +{ + struct meson_sec_wdt *data = watchdog_get_drvdata(wdt_dev); + + wdt_dev->timeout = timeout; + + return meson_sm_call(data->fw, SM_A1_WATCHDOG_OPS, NULL, + MESON_SIP_WDT_SETTIMEOUT, + wdt_dev->timeout * 1000, 0, 0, 0); +} + +static unsigned int meson_sec_wdt_get_timeleft(struct watchdog_device *wdt_dev) +{ + int ret; + unsigned int timeleft; + struct meson_sec_wdt *data = watchdog_get_drvdata(wdt_dev); + + ret = meson_sm_call(data->fw, SM_A1_WATCHDOG_OPS, &timeleft, + MESON_SIP_WDT_GETTIMELEFT, 0, 0, 0, 0); + + if (ret) + return 0; + + return timeleft; +} + +static const struct watchdog_ops meson_sec_wdt_ops = { + .start = meson_sec_wdt_start, + .stop = meson_sec_wdt_stop, + .ping = meson_sec_wdt_ping, + .set_timeout = meson_sec_wdt_set_timeout, + .get_timeleft = meson_sec_wdt_get_timeleft, +}; + +static const struct watchdog_info meson_sec_wdt_info = { + .identity = "Meson Secure Watchdog Timer", + .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, +}; + +static int __maybe_unused meson_sec_wdt_resume(struct device *dev) +{ + struct meson_sec_wdt *data = dev_get_drvdata(dev); + + if (watchdog_active(&data->wdt_dev)) + return meson_sec_wdt_start(&data->wdt_dev); + + return 0; +} + +static int __maybe_unused meson_sec_wdt_suspend(struct device *dev) +{ + struct meson_sec_wdt *data = dev_get_drvdata(dev); + + if (watchdog_active(&data->wdt_dev)) + return meson_sec_wdt_stop(&data->wdt_dev); + + return 0; +} + +static const struct dev_pm_ops meson_sec_wdt_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(meson_sec_wdt_suspend, meson_sec_wdt_resume) +}; + +static const struct of_device_id meson_sec_wdt_dt_ids[] = { + { .compatible = "amlogic,meson-sec-wdt", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, meson_sec_wdt_dt_ids); + +static int meson_sec_wdt_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct meson_sec_wdt *data; + struct device_node *sm_np; + int ret; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + sm_np = dev_of_node(dev->parent); + if (!sm_np) + return -EINVAL; + + data->fw = meson_sm_get(sm_np); + if (!data->fw) + return -EPROBE_DEFER; + + platform_set_drvdata(pdev, data); + + data->wdt_dev.parent = dev; + data->wdt_dev.info = &meson_sec_wdt_info; + data->wdt_dev.ops = &meson_sec_wdt_ops; + data->wdt_dev.max_hw_heartbeat_ms = MAX_TIMEOUT_MS; + data->wdt_dev.min_timeout = 1; + data->wdt_dev.timeout = DEFAULT_TIMEOUT; + watchdog_set_drvdata(&data->wdt_dev, data); + watchdog_init_timeout(&data->wdt_dev, 0, dev); + + ret = meson_sm_call(data->fw, SM_A1_WATCHDOG_OPS, NULL, + MESON_SIP_WDT_INIT, + data->wdt_dev.timeout * 1000, 0, 0, 0); + if (ret) + return ret; + + watchdog_stop_on_reboot(&data->wdt_dev); + + return devm_watchdog_register_device(dev, &data->wdt_dev); +} + +static struct platform_driver meson_sec_wdt_driver = { + .probe = meson_sec_wdt_probe, + .driver = { + .name = "meson-sec-wdt", + .pm = &meson_sec_wdt_pm_ops, + .of_match_table = meson_sec_wdt_dt_ids, + }, +}; + +module_platform_driver(meson_sec_wdt_driver); + +MODULE_AUTHOR("Xingyu Chen "); +MODULE_DESCRIPTION("Amlogic Secure Watchdog Timer Driver"); +MODULE_LICENSE("Dual MIT/GPL"); From patchwork Tue Jan 14 03:50:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingyu Chen X-Patchwork-Id: 11331277 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C2977139A for ; Tue, 14 Jan 2020 03:51:07 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id A0AF9214AF for ; Tue, 14 Jan 2020 03:51:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="EGo3m/fJ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A0AF9214AF Authentication-Results: mail.kernel.org; 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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1irDEO-0003V4-O0; Tue, 14 Jan 2020 03:51:04 +0000 Received: from mail-sz.amlogic.com ([211.162.65.117]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1irDEM-0003Ty-2K; Tue, 14 Jan 2020 03:51:03 +0000 Received: from droid12-sz.software.amlogic (10.28.8.22) by mail-sz.amlogic.com (10.28.11.5) with Microsoft SMTP Server id 15.1.1591.10; Tue, 14 Jan 2020 11:51:28 +0800 From: Xingyu Chen To: Wim Van Sebroeck , Guenter Roeck , Kevin Hilman , Neil Armstrong Subject: [PATCH v6 5/5] arm64: dts: a1: add secure watchdog controller Date: Tue, 14 Jan 2020 11:50:58 +0800 Message-ID: <1578973858-10189-1-git-send-email-xingyu.chen@amlogic.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [10.28.8.22] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200113_195102_110600_A34988B9 X-CRM114-Status: UNSURE ( 5.97 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Qianggui Song , devicetree@vger.kernel.org, linux-watchdog@vger.kernel.org, Jianxin Pan , Martin Blumenstingl , linux-kernel@vger.kernel.org, Rob Herring , Jian Hu , linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, Xingyu Chen , Jerome Brunet Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Enable secure watchdog controller for Meson-A1 SoC Signed-off-by: Xingyu Chen --- arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi index 4dec518..d89a44b 100644 --- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi @@ -60,6 +60,12 @@ sm: secure-monitor { compatible = "amlogic,meson-gxbb-sm"; + + watchdog { + compatible = "amlogic,meson-sec-wdt"; + timeout-sec = <60>; + status = "okay"; + }; }; soc {