From patchwork Fri Jul 1 14:58:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhupesh Sharma X-Patchwork-Id: 587043 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 5FB7BC433EF for ; Fri, 1 Jul 2022 14:58:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231745AbiGAO6j (ORCPT ); Fri, 1 Jul 2022 10:58:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54240 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231879AbiGAO6i (ORCPT ); Fri, 1 Jul 2022 10:58:38 -0400 Received: from mail-pj1-x1035.google.com (mail-pj1-x1035.google.com [IPv6:2607:f8b0:4864:20::1035]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 863BC20F56 for ; Fri, 1 Jul 2022 07:58:37 -0700 (PDT) Received: by mail-pj1-x1035.google.com with SMTP id n16-20020a17090ade9000b001ed15b37424so2929271pjv.3 for ; Fri, 01 Jul 2022 07:58:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=y95vOAUApepxdfAS6VCO8MeeZD3qR/4xU+0HXt3Q4Pc=; b=PPFEpDRgJRyElvbUXlO/CnhqMUwwV6Pghk11+qPIMMwowcfexUKv1oBSm+0QMl0b+z 1mBEJl2l9TgFiWvEbf/4+Yml6MWZPUmdTS60wjdzprIlHD7sQBY1YrNgYWB2QGALg/A/ p5OljYAFccl9U8043eE/E1ZZpiB4IAL24N11Dhhmp0JaSAZXAOHVHB4wLVFzOj2v+JG9 X4EZJ7P/+PWxsKEcZzf4pnS3DIfR4keP0jq5L9gPs2L9kbn5KzJkfsVXpO0/i9CGtjVX 9L7k5lcgmICyR8vbzJOIqPnmJyrekapLcjPTlSUI72UJ2CgKrW/+hBm8oMAOCPwDDmVH LgEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=y95vOAUApepxdfAS6VCO8MeeZD3qR/4xU+0HXt3Q4Pc=; b=Lck6hKFvbWeS0qCuG6gVOpOr7/cGJoLtmvYxR7Kd1NvXJAHyuIQpalZWLPODWqHxBo 45XcOuQR2W2aLPYZNCxt6yLuwB52eWFvgss3QKjxkYLMztBjDJE+9w0rJGh+4pk0gOcK fD3wEOeuFnXhqk7kQ6ANPI8Y50QMiqh7edccwt7xjxYHorM9Uryeq0bs2jLYAEz1//yj ptyLmPdKkwOS0cdNjC2Ij029Oji+VPGZRHbRLmv+UKM3+Fz8gqw4IC+aGfWahemZ5siY 5Cv1Ezz4O6A6nTGeqjNJSQVqmutbdA8XxYQNdnYs+sVhkOf3hc8F/C+utIIqjdrPFnFx 9N1g== X-Gm-Message-State: AJIora/kwa74ENQtP/qZjghVa1dtlWfgip2UCERoTKuEZ9JxWYe4EVSN g3GX1ugfULy0OplpEvpjrkxEEK8gYsSNrg== X-Google-Smtp-Source: AGRyM1vzmrIzZf2BDabs1hjTuSEkiX8S8C1+x6OgqG+TemmvKKhNYWXUJxztzdTtoCkW8xbq3wQfsg== X-Received: by 2002:a17:90a:f8c2:b0:1ec:d690:a269 with SMTP id l2-20020a17090af8c200b001ecd690a269mr17108875pjd.190.1656687516832; Fri, 01 Jul 2022 07:58:36 -0700 (PDT) Received: from localhost.localdomain ([2401:4900:1c5e:e6c0:8e75:c988:f80f:8bec]) by smtp.gmail.com with ESMTPSA id y19-20020a170902e19300b0016b844cd7e9sm9641399pla.115.2022.07.01.07.58.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Jul 2022 07:58:36 -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, Amit Kucheria , Thara Gopinath , linux-arm-msm@vger.kernel.org Subject: [PATCH 1/3] firmware: qcom_scm: Add support for tsens reinit workaround Date: Fri, 1 Jul 2022 20:28:13 +0530 Message-Id: <20220701145815.2037993-2-bhupesh.sharma@linaro.org> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220701145815.2037993-1-bhupesh.sharma@linaro.org> References: <20220701145815.2037993-1-bhupesh.sharma@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Some versions of QCoM 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 Signed-off-by: Bhupesh Sharma --- drivers/firmware/qcom_scm.c | 17 +++++++++++++++++ drivers/firmware/qcom_scm.h | 4 ++++ include/linux/qcom_scm.h | 2 ++ 3 files changed, 23 insertions(+) diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index 3163660fa8e2..0bc7cc466218 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -796,6 +796,23 @@ 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(int *tsens_ret) +{ + unsigned int ret; + 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); + if (tsens_ret) + *tsens_ret = res.result[0]; + + return ret; +} +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..f8c9eb739df1 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(int *tsens_ret); + #endif