From patchwork Thu Sep 1 10:54:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhupesh Sharma X-Patchwork-Id: 602465 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 788A8ECAAD3 for ; Thu, 1 Sep 2022 10:54:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234165AbiIAKyp (ORCPT ); Thu, 1 Sep 2022 06:54:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51310 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234154AbiIAKym (ORCPT ); Thu, 1 Sep 2022 06:54:42 -0400 Received: from mail-pf1-x42a.google.com (mail-pf1-x42a.google.com [IPv6:2607:f8b0:4864:20::42a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 577D31321C4 for ; Thu, 1 Sep 2022 03:54:34 -0700 (PDT) Received: by mail-pf1-x42a.google.com with SMTP id t129so17111474pfb.6 for ; Thu, 01 Sep 2022 03:54:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=JUQCoAsOqHp/dubozy2ybfyMmZNRsIHeStZD6k/cN8k=; b=pEHoyzdBfl05pa53IbQHgeW5T2Pk8XlmAmTFxk2pg4HL/nrmtoC975q8j2ZDRANdNv Co4fEWnThatHt8+F6pTwPDv4/sLtMi2cDLupK0G6zsFZd9Z2SPyy8ZAhJEwwU8Hl9ZYh msAX2J4/xLFzGPNKgh2znuo8frcPgb8APsDbgcF3G347i2VqUN/GZccYTTb9GDnawbhq 77WMY/iP53dNcAo6iSvT8BVwsox8r2g/4P70wJrbQRCQG6DrzyYew63m1jl/GIGoNkWy RhFpHtLewIltZoSklyakFdiBYNwYUa2jlrHAfy0GKdiaIFB//dMH9xfkE2814WdTL06F RFyw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=JUQCoAsOqHp/dubozy2ybfyMmZNRsIHeStZD6k/cN8k=; b=ZV+k5H21c01oN7SFbtTcOYp7TbOTjxgBoPVO+UVqg9B+dbVwAq11aMl4O80zA/lzd7 THAbGn7IJrhUXk6XOLvtl5SivgTujHC0HZ9l1xB3D7H4eFDUJjsuBkOP82VbNNFeSQ1c hRR1RjzkRBZnztWBeXCzFTK+QRNFzDuBj2JHkYbYvAgFM6H2GND7rqCpX8vtRLC0xWLs h4Er/mB4QuH/GuIJVY3VVZYkiuYXI7WKwM9LQszqEFnC4sl5q7ow4VtLQ+konoqhYUEr FjIT4YphZwTSNpLnYq0JfVQ9t5rqZRnf3AGBqJlooejetUy/DL5jVza4Odz/lEGtZH6v V8Uw== X-Gm-Message-State: ACgBeo2wg5DqEakphdqOZr0O+jRhC7RQ8bd2gWTGnzu+I6vllbdJ/uPl PQdfgwax38AtSzjniG0uI3Afgg== X-Google-Smtp-Source: AA6agR42SHfyY0313yjJ+yTynSdioV4ONB04qGKCcLNFL7OWBmLXKp2Mj65GLrNmOCcD22FWobLf/Q== X-Received: by 2002:a62:1ac5:0:b0:538:3332:d531 with SMTP id a188-20020a621ac5000000b005383332d531mr19601658pfa.46.1662029673282; Thu, 01 Sep 2022 03:54:33 -0700 (PDT) Received: from localhost.localdomain ([2401:4900:1c60:5362:8069:f46:34af:eb19]) by smtp.gmail.com with ESMTPSA id ij13-20020a170902ab4d00b0016c57657977sm13508910plb.41.2022.09.01.03.54.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Sep 2022 03:54:33 -0700 (PDT) From: Bhupesh Sharma To: linux-pm@vger.kernel.org Cc: bhupesh.sharma@linaro.org, bhupesh.linux@gmail.com, linux-kernel@vger.kernel.org, andersson@kernel.org, konrad.dybcio@somainline.org, linux-arm-msm@vger.kernel.org, daniel.lezcano@linaro.org, robh+dt@kernel.org, rafael@kernel.org, Amit Kucheria , Thara Gopinath Subject: [PATCH v4 1/4] firmware: qcom: scm: Add support for tsens reinit workaround Date: Thu, 1 Sep 2022 16:24:11 +0530 Message-Id: <20220901105414.1171813-2-bhupesh.sharma@linaro.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220901105414.1171813-1-bhupesh.sharma@linaro.org> References: <20220901105414.1171813-1-bhupesh.sharma@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Some versions of Qualcomm tsens controller might enter a 'bad state' while running stability tests causing sensor temperatures/interrupts status to be in an 'invalid' state. It is recommended to re-initialize the tsens controller via trustzone (secure registers) using scm call(s) when that happens. Add support for the same in the qcom_scm driver. Cc: Amit Kucheria Cc: Thara Gopinath Cc: linux-pm@vger.kernel.org Cc: linux-arm-msm@vger.kernel.org Reviewed-by: Bjorn Andersson Signed-off-by: Bhupesh Sharma --- drivers/firmware/qcom_scm.c | 15 +++++++++++++++ drivers/firmware/qcom_scm.h | 4 ++++ include/linux/qcom_scm.h | 2 ++ 3 files changed, 21 insertions(+) diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index cdbfe54c8146..93adcc046a62 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -858,6 +858,21 @@ int qcom_scm_mem_protect_video_var(u32 cp_start, u32 cp_size, } EXPORT_SYMBOL(qcom_scm_mem_protect_video_var); +int qcom_scm_tsens_reinit(void) +{ + int ret; + const struct qcom_scm_desc desc = { + .svc = QCOM_SCM_SVC_TSENS, + .cmd = QCOM_SCM_TSENS_INIT_ID, + }; + struct qcom_scm_res res; + + ret = qcom_scm_call(__scm->dev, &desc, &res); + + return ret ? : res.result[0]; +} +EXPORT_SYMBOL(qcom_scm_tsens_reinit); + static int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region, size_t mem_sz, phys_addr_t src, size_t src_sz, phys_addr_t dest, size_t dest_sz) diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h index 0d51eef2472f..5762f02dde7c 100644 --- a/drivers/firmware/qcom_scm.h +++ b/drivers/firmware/qcom_scm.h @@ -94,6 +94,10 @@ extern int scm_legacy_call(struct device *dev, const struct qcom_scm_desc *desc, #define QCOM_SCM_PIL_PAS_IS_SUPPORTED 0x07 #define QCOM_SCM_PIL_PAS_MSS_RESET 0x0a +/* TSENS Services and Function IDs */ +#define QCOM_SCM_SVC_TSENS 0x1e +#define QCOM_SCM_TSENS_INIT_ID 0x5 + #define QCOM_SCM_SVC_IO 0x05 #define QCOM_SCM_IO_READ 0x01 #define QCOM_SCM_IO_WRITE 0x02 diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h index f8335644a01a..5c37e1658cef 100644 --- a/include/linux/qcom_scm.h +++ b/include/linux/qcom_scm.h @@ -124,4 +124,6 @@ extern int qcom_scm_lmh_dcvsh(u32 payload_fn, u32 payload_reg, u32 payload_val, extern int qcom_scm_lmh_profile_change(u32 profile_id); extern bool qcom_scm_lmh_dcvsh_available(void); +extern int qcom_scm_tsens_reinit(void); + #endif