From patchwork Thu Aug 4 05:46:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhupesh Sharma X-Patchwork-Id: 595589 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 93A6CC19F2D for ; Thu, 4 Aug 2022 05:47:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238847AbiHDFrA (ORCPT ); Thu, 4 Aug 2022 01:47:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45624 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238789AbiHDFq4 (ORCPT ); Thu, 4 Aug 2022 01:46:56 -0400 Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2889B5FAEC for ; Wed, 3 Aug 2022 22:46:55 -0700 (PDT) Received: by mail-pl1-x62b.google.com with SMTP id d16so10304869pll.11 for ; Wed, 03 Aug 2022 22:46:55 -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; bh=knYZVAmP/Bzeklaj6dd4onpv7s/0aWzK0OLPNMow6Oo=; b=oiGAb3nZTqAVeXKC2q6OSWCPTc2TCwaOu7pIy42JBHWMdbOup1bH7+dXP2juucOS5n FbkkPrG/mSFKvSpKiK5ISWDaklAZEo1lFUvwFekKW4y9Gq5BE3p2OGEdCegu5+aLbbWy FRyzxNryrI3UY5ffGkPQUZEq/9PBZlbW/oZgAPS6s+p4mqlt8AcmStBSQoGUk2xigfa1 blvJYU+NoTrHKLPMcDXQFk0xNQKyg8q2e2Q9EhBwP/aPEWASzFFIEb6O79DnbMKjqeL4 4HI4H3d9fdjIZ5a552bOFZTHw42akmTulEvBoMe4aqMN4sDuCIbgclx2sAzW50vXzyl+ 2pWg== 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; bh=knYZVAmP/Bzeklaj6dd4onpv7s/0aWzK0OLPNMow6Oo=; b=uQy4tb484+kqKWbCCkUqF2Q5ch2HW3bJZ0op8oL2ZDwluzq39taN1G7YEigwzeeaoB 1ppflqiWp1Jqub/i3VIunOJFamHzCBkJlSLviF5KcFQZAv4BiYC61ZO4WWTaMkF9bLcJ NHulU5hEpwz++Hj6lSSTSawJJdszwg3SIbX6wwjR8vRqH6SxkOC7ZVigCVnxvYaOMSNE 97qCoXmb5gG/8NH1TDRwGe9C8Mk0ltOR8EExcrrPpHBmK25+tE7UatkuE5ALA5NEvi3l 7ILYr60XcYA/2Lz6G8IjVfPOgyonDXLaXx3/qjwwdoEGS/4IuzFb5N56FtlLL/bkuTi7 rWXQ== X-Gm-Message-State: ACgBeo1gKOPmijIqSamwgFYSp2N9cUiTZf+rg+SgmrGmXyJRFKlw62Cx IdiYt6GvHynLi4i6T1CQ57fEsQ== X-Google-Smtp-Source: AA6agR55jjSTxfauACZeG1uHaAeE7Jy3PPM7lEUupraiPkCM09k1TEDaA147tE7lp6cjcYkBOexUcQ== X-Received: by 2002:a17:90b:1645:b0:1f5:67f:ff84 with SMTP id il5-20020a17090b164500b001f5067fff84mr307254pjb.86.1659592014546; Wed, 03 Aug 2022 22:46:54 -0700 (PDT) Received: from localhost.localdomain ([2401:4900:1c5e:ddbf:1bd6:4443:9e5b:2aa2]) by smtp.gmail.com with ESMTPSA id q25-20020aa78439000000b0052dcd14e3desm5375636pfn.183.2022.08.03.22.46.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Aug 2022 22:46:54 -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, bjorn.andersson@linaro.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 v3 1/4] firmware: qcom: scm: Add support for tsens reinit workaround Date: Thu, 4 Aug 2022 11:16:35 +0530 Message-Id: <20220804054638.3197294-2-bhupesh.sharma@linaro.org> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220804054638.3197294-1-bhupesh.sharma@linaro.org> References: <20220804054638.3197294-1-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: Bjorn Andersson Cc: Amit Kucheria Cc: Thara Gopinath Cc: linux-pm@vger.kernel.org Cc: linux-arm-msm@vger.kernel.org Signed-off-by: Bhupesh Sharma Reviewed-by: Bjorn Andersson --- 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..495fa00230c7 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