From patchwork Sun Apr 4 14:48:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Marangi X-Patchwork-Id: 415178 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.2 required=3.0 tests=BAYES_00, DATE_IN_PAST_03_06, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 329ADC433B4 for ; Sun, 4 Apr 2021 20:35:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0994761205 for ; Sun, 4 Apr 2021 20:35:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231644AbhDDUfa (ORCPT ); Sun, 4 Apr 2021 16:35:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35396 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231478AbhDDUfU (ORCPT ); Sun, 4 Apr 2021 16:35:20 -0400 Received: from mail-ed1-x52a.google.com (mail-ed1-x52a.google.com [IPv6:2a00:1450:4864:20::52a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7CB4EC061756; Sun, 4 Apr 2021 13:35:14 -0700 (PDT) Received: by mail-ed1-x52a.google.com with SMTP id o19so10656695edc.3; Sun, 04 Apr 2021 13:35:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=N4I8SseA+uAjlNmTN1EGCZ72iXk5YAbU2hCUeH8QSlQ=; b=gHVVrudpqwk6BKc70SzI/EGmRh+XiyHKhjeOSRp+GVIReRWn7bsViLC7DVk/ZiitSD ZqAayRhmK7Ys+/BSJ4V9DJ+HGKSVtAW3DhnwUKzYRFe3mSmbvxeZDm8S7hkgvF/yX20h NGIxNSsA21VUYl6KftVAfKBW+mAvNdpHBkGxNzaRrrFocvKedXy03ajxPdISxVm0iu8y MDCo3IBJki3jNkAJyyffrXe84OMNM00Hdx+i7n50W0FoEZl7xrucBWY/VZsYCBSK9WqC B0CXqINlGV4V9YfjHud7bNHmKSEXl7GWfRBMFVzpxDgJS+DVHGbUo9Kiz5zifY6GZ9KT YBaw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=N4I8SseA+uAjlNmTN1EGCZ72iXk5YAbU2hCUeH8QSlQ=; b=ueOl65JVeOA+rSWWHMqjwV0JMYhImvCLHVOJtGKMeTtLBj3MoC2HVetfRqwAKkICyC vl1YeTQfE8cdjVVSjj0NCpUZSoxK4YYDOnn+EebT/+GW0R/Z7dqY8xuMR9IyP8C7mPu6 lbw7gZCQxNVp1Bez1RG+RVAyDThJROs2r12ubqRFUoNeEF6Xfh63yteEhqY1vyOZAQu/ aSO6WV/eEC1HAab2f4XMrf9nTJoI2aK6GbMo5OXEvL+Y7w+xoAjbrWE2kvs1ix2za2Ep oFszZTrWXPehFh4E6sI1zeNK2TCbuEHOpczFzDxW6k1QToTqfakNb0f7qzYkQxA9eROQ PnpQ== X-Gm-Message-State: AOAM533/9Hf0VSxP8dM3XmRz2vXi3fgNPSpir0Ocylg2kNmZi2DtGYIu aQNYZuT9bE1C3P1nsWh9lmQ9V/kBLQY= X-Google-Smtp-Source: ABdhPJxCG1LbUCc2+gqmgWSDiRCJIaQRZTpaweAIh3eGU+m8dYKt8HwUZh9EbwbNARARrlKw6iAWrg== X-Received: by 2002:aa7:c957:: with SMTP id h23mr27276746edt.301.1617568513184; Sun, 04 Apr 2021 13:35:13 -0700 (PDT) Received: from Ansuel-xps.localdomain (host-79-52-251-187.retail.telecomitalia.it. [79.52.251.187]) by smtp.googlemail.com with ESMTPSA id s4sm7191140ejf.108.2021.04.04.13.35.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 04 Apr 2021 13:35:12 -0700 (PDT) From: Ansuel Smith To: Daniel Lezcano Cc: Ansuel Smith , Thara Gopinath , Andy Gross , Bjorn Andersson , Amit Kucheria , Zhang Rui , Rob Herring , linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v14 5/9] drivers: thermal: tsens: Fix bug in sensor enable for msm8960 Date: Sun, 4 Apr 2021 16:48:19 +0200 Message-Id: <20210404144823.31867-6-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210404144823.31867-1-ansuelsmth@gmail.com> References: <20210404144823.31867-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Device based on tsens VER_0 contains a hardware bug that results in some problem with sensor enablement. Sensor id 6-11 can't be enabled selectively and all of them must be enabled in one step. Signed-off-by: Ansuel Smith Acked-by: Thara Gopinath --- drivers/thermal/qcom/tsens-8960.c | 23 ++++++++++++++++++++--- 1 file changed, 20 insertions(+), 3 deletions(-) diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c index 86585f439985..95fcccafae14 100644 --- a/drivers/thermal/qcom/tsens-8960.c +++ b/drivers/thermal/qcom/tsens-8960.c @@ -27,9 +27,9 @@ #define EN BIT(0) #define SW_RST BIT(1) #define SENSOR0_EN BIT(3) +#define MEASURE_PERIOD BIT(18) #define SLP_CLK_ENA BIT(26) #define SLP_CLK_ENA_8660 BIT(24) -#define MEASURE_PERIOD 1 #define SENSOR0_SHIFT 3 /* INT_STATUS_ADDR bitmasks */ @@ -126,17 +126,34 @@ static int resume_8960(struct tsens_priv *priv) static int enable_8960(struct tsens_priv *priv, int id) { int ret; - u32 reg, mask; + u32 reg, mask = BIT(id); ret = regmap_read(priv->tm_map, CNTL_ADDR, ®); if (ret) return ret; - mask = BIT(id + SENSOR0_SHIFT); + /* HARDWARE BUG: + * On platforms with more than 6 sensors, all remaining sensors + * must be enabled together, otherwise undefined results are expected. + * (Sensor 6-7 disabled, Sensor 3 disabled...) In the original driver, + * all the sensors are enabled in one step hence this bug is not + * triggered. + */ + if (id > 5) + mask = GENMASK(10, 6); + + mask <<= SENSOR0_SHIFT; + + /* Sensors already enabled. Skip. */ + if ((reg & mask) == mask) + return 0; + ret = regmap_write(priv->tm_map, CNTL_ADDR, reg | SW_RST); if (ret) return ret; + reg |= MEASURE_PERIOD; + if (priv->num_sensors > 1) reg |= mask | SLP_CLK_ENA | EN; else