From patchwork Tue Aug 15 02:34:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiansheng Wu X-Patchwork-Id: 13353453 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4855DC001DB for ; Tue, 15 Aug 2023 02:35:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234251AbjHOCfS (ORCPT ); Mon, 14 Aug 2023 22:35:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51060 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234262AbjHOCfH (ORCPT ); Mon, 14 Aug 2023 22:35:07 -0400 Received: from SHSQR01.spreadtrum.com (unknown [222.66.158.135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1012810D0; Mon, 14 Aug 2023 19:35:03 -0700 (PDT) Received: from dlp.unisoc.com ([10.29.3.86]) by SHSQR01.spreadtrum.com with ESMTP id 37F2YYVR066422; Tue, 15 Aug 2023 10:34:34 +0800 (+08) (envelope-from Jiansheng.Wu@unisoc.com) Received: from SHDLP.spreadtrum.com (shmbx05.spreadtrum.com [10.29.1.56]) by dlp.unisoc.com (SkyGuard) with ESMTPS id 4RPwK704pXz2P8CXW; Tue, 15 Aug 2023 10:32:27 +0800 (CST) Received: from xm9614pcu.spreadtrum.com (10.13.2.29) by shmbx05.spreadtrum.com (10.29.1.56) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Tue, 15 Aug 2023 10:34:32 +0800 From: Jiansheng Wu To: Mark Brown , Orson Zhai , Baolin Wang , Chunyan Zhang CC: , , , , Subject: [PATCH 1/8] Spi: sprd-adi: Getting panic reason before reboot Date: Tue, 15 Aug 2023 10:34:19 +0800 Message-ID: <20230815023426.15076-1-jiansheng.wu@unisoc.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.13.2.29] X-ClientProxiedBy: SHCAS03.spreadtrum.com (10.0.1.207) To shmbx05.spreadtrum.com (10.29.1.56) X-MAIL: SHSQR01.spreadtrum.com 37F2YYVR066422 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Registered adi_panic_event to panic_notifier_list, that is used to get panic reason and judge restart causes before system reboot. It's can improve reboot reasons from panic. Signed-off-by: Jiansheng Wu --- drivers/spi/spi-sprd-adi.c | 46 ++++++++++++++++++++++++++++++++++---- 1 file changed, 42 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-sprd-adi.c b/drivers/spi/spi-sprd-adi.c index 22e39c4c12c4..dd00d63a3cd0 100644 --- a/drivers/spi/spi-sprd-adi.c +++ b/drivers/spi/spi-sprd-adi.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -128,6 +129,8 @@ #define WDG_LOAD_MASK GENMASK(15, 0) #define WDG_UNLOCK_KEY 0xe551 +#define PANIC_REASON_LEN_MAX 20 + struct sprd_adi_wdg { u32 base; u32 rst_sts; @@ -155,6 +158,31 @@ struct sprd_adi { const struct sprd_adi_data *data; }; +static char *panic_reason; +static int adi_panic_event(struct notifier_block *self, unsigned long val, void *reason) +{ + if (reason == NULL) + return 0; + + if (strlen(reason) < PANIC_REASON_LEN_MAX) + memcpy(panic_reason, reason, strlen(reason)); + else + memcpy(panic_reason, reason, PANIC_REASON_LEN_MAX); + + return 0; +} + +static struct notifier_block adi_panic_event_nb = { + .notifier_call = adi_panic_event, + .priority = INT_MAX, +}; + +static int adi_get_panic_reason_init(void) +{ + atomic_notifier_chain_register(&panic_notifier_list, &adi_panic_event_nb); + return 0; +} + static int sprd_adi_check_addr(struct sprd_adi *sadi, u32 reg) { if (reg >= sadi->data->slave_addr_size) { @@ -378,9 +406,15 @@ static int sprd_adi_restart(struct notifier_block *this, unsigned long mode, restart_handler); u32 val, reboot_mode = 0; - if (!cmd) - reboot_mode = HWRST_STATUS_NORMAL; - else if (!strncmp(cmd, "recovery", 8)) + if (!cmd) { + if (strlen(panic_reason)) { + reboot_mode = HWRST_STATUS_PANIC; + if (strstr(panic_reason, "tospanic")) + reboot_mode = HWRST_STATUS_SECURITY; + } else { + reboot_mode = HWRST_STATUS_NORMAL; + } + } else if (!strncmp(cmd, "recovery", 8)) reboot_mode = HWRST_STATUS_RECOVERY; else if (!strncmp(cmd, "alarm", 5)) reboot_mode = HWRST_STATUS_ALARM; @@ -520,6 +554,10 @@ static int sprd_adi_probe(struct platform_device *pdev) u16 num_chipselect; int ret; + panic_reason = devm_kzalloc(&pdev->dev, (sizeof(char))*PANIC_REASON_LEN_MAX, GFP_KERNEL); + if (!panic_reason) + return -ENOMEM; + if (!np) { dev_err(&pdev->dev, "can not find the adi bus node\n"); return -ENODEV; @@ -573,7 +611,7 @@ static int sprd_adi_probe(struct platform_device *pdev) } sprd_adi_hw_init(sadi); - + adi_get_panic_reason_init(); if (sadi->data->wdg_rst) sadi->data->wdg_rst(sadi);