From patchwork Mon Aug 16 08:27:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 12437945 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 D1025C4338F for ; Mon, 16 Aug 2021 08:27:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AFC5961B1C for ; Mon, 16 Aug 2021 08:27:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234769AbhHPI22 (ORCPT ); Mon, 16 Aug 2021 04:28:28 -0400 Received: from smtp-relay-canonical-1.canonical.com ([185.125.188.121]:37194 "EHLO smtp-relay-canonical-1.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234846AbhHPI21 (ORCPT ); Mon, 16 Aug 2021 04:28:27 -0400 Received: from mail-ed1-f69.google.com (mail-ed1-f69.google.com [209.85.208.69]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-canonical-1.canonical.com (Postfix) with ESMTPS id 260AC412B6 for ; Mon, 16 Aug 2021 08:27:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1629102476; bh=lxDKaysG/aHQwlTNKh0Nbuao0YTQ8x2bzMWqPvbdZ6o=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=jeZc+nZAlau1V5fVk6nvKy98NudglkKsgkKEqDAxJFS30LWS42A81kN3AsL6Bg4sw SbbeVKF72KBRt/9hMSR/s74v/JDX1WM/PIsME/wGHvimfHEQNd1+0kClyY3ffaWpix ZckyZ4xQvc1U86y1qFL4J4Ib2h9ykf8jbJni9iGO23wcK/h4P+kO5fXLilriBWWEIo Gmq9bMH8hctFER7R/osvTIJCr6uz3YM1JFORHCSvHSkHZ4CeTyqiUXyKI3/b46Xn8Y EgreidCC2cA5dI7+g8USMvBCQ3HBh9f81n2N/zATax15qJwFpt/SQIinv4UL47w78N Vj5+JD2z2WbpQ== Received: by mail-ed1-f69.google.com with SMTP id x24-20020aa7dad8000000b003bed477317eso2345726eds.18 for ; Mon, 16 Aug 2021 01:27:56 -0700 (PDT) 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:mime-version :content-transfer-encoding; bh=lxDKaysG/aHQwlTNKh0Nbuao0YTQ8x2bzMWqPvbdZ6o=; b=Jgp68uScv1It6eNtSYkqrAlAcIkLFROZvoOXO0OJUWKMk4Zv9M/NH0LeeJ9iVLdtIJ N0q7By6QO2KsGvLQBNAKugoD3Wrc876c8JdlpWIjzrVyTtdXMkzHQNTVqKCOgbXTPuqr iKuvw7VFn1H3yeEHx14j4XqHH7LjXIudtqkQd0m9t+xH55dweOzgOAJUYhDPRWzZN8xf PY05JcUSSQ9qGSaoiGDKMPgr79o1C/GSp6yTW8xK6JubLmkm9m3hU/mSfZGvT5TYPG/t yYzBga6Igun5sz7Cyzd36p8zx7H/4xUvfxeAWBKAx3FtJcLjzkLZJgDhlgeKMLyFCOII kANg== X-Gm-Message-State: AOAM532/QkyjGH7gM1etgUCnXK7EtFGYevhh2KuMebrtLrGvcsXQsRjG 87VZad9OvEWLMGy2aZnmBVZO1URac1nFjNlTEa4XFBP8ibJm6j7w7zgwl+yZwVP6+8qWJTTF2yj 6u89gKsuY6PMg6DDePkEYa9Fe6iVBQmKBYw75 X-Received: by 2002:a17:906:fb91:: with SMTP id lr17mr15003421ejb.110.1629102475754; Mon, 16 Aug 2021 01:27:55 -0700 (PDT) X-Google-Smtp-Source: ABdhPJz+BOVdere6Fu0M0Ic4QLSp/IuflMOckAgBI2uLtSkJ1OUJq6KxP3xK5gCoc2lA1BHWOYxnbQ== X-Received: by 2002:a17:906:fb91:: with SMTP id lr17mr15003404ejb.110.1629102475630; Mon, 16 Aug 2021 01:27:55 -0700 (PDT) Received: from localhost.localdomain ([86.32.42.198]) by smtp.gmail.com with ESMTPSA id ay20sm4469605edb.91.2021.08.16.01.27.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Aug 2021 01:27:55 -0700 (PDT) From: Krzysztof Kozlowski To: Sebastian Reichel , Rob Herring , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Sebastian Krzyszkowiak , Christophe JAILLET , Hans de Goede , Krzysztof Kozlowski , stable@vger.kernel.org Subject: [PATCH 1/3] power: supply: max17042: handle fails of reading status register Date: Mon, 16 Aug 2021 10:27:14 +0200 Message-Id: <20210816082716.21193-1-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Reading status register can fail in the interrupt handler. In such case, the regmap_read() will not store anything useful under passed 'val' variable and random stack value will be used to determine type of interrupt. Handle the regmap_read() failure to avoid handling interrupt type and triggering changed power supply event based on random stack value. Fixes: 39e7213edc4f ("max17042_battery: Support regmap to access device's registers") Cc: Signed-off-by: Krzysztof Kozlowski Reviewed-by: Hans de Goede --- drivers/power/supply/max17042_battery.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c index ce2041b30a06..858ae97600d4 100644 --- a/drivers/power/supply/max17042_battery.c +++ b/drivers/power/supply/max17042_battery.c @@ -869,8 +869,12 @@ static irqreturn_t max17042_thread_handler(int id, void *dev) { struct max17042_chip *chip = dev; u32 val; + int ret; + + ret = regmap_read(chip->regmap, MAX17042_STATUS, &val); + if (ret) + return IRQ_HANDLED; - regmap_read(chip->regmap, MAX17042_STATUS, &val); if ((val & STATUS_INTR_SOCMIN_BIT) || (val & STATUS_INTR_SOCMAX_BIT)) { dev_info(&chip->client->dev, "SOC threshold INTR\n"); From patchwork Mon Aug 16 08:27:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 12437947 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 E728BC4320A for ; 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Mon, 16 Aug 2021 01:27:57 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzgJtC2xYYQ1rabRz50rSzNmMkzjNcca15jnOWvhr6wFrPLEn2SCpbF7hYawopjlDIBOZlkew== X-Received: by 2002:a17:906:32d9:: with SMTP id k25mr5909673ejk.290.1629102477040; Mon, 16 Aug 2021 01:27:57 -0700 (PDT) Received: from localhost.localdomain ([86.32.42.198]) by smtp.gmail.com with ESMTPSA id ay20sm4469605edb.91.2021.08.16.01.27.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Aug 2021 01:27:56 -0700 (PDT) From: Krzysztof Kozlowski To: Sebastian Reichel , Rob Herring , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Sebastian Krzyszkowiak , Christophe JAILLET , Hans de Goede , Krzysztof Kozlowski Subject: [PATCH 2/3] power: supply: max17042: remove duplicated STATUS bit defines Date: Mon, 16 Aug 2021 10:27:15 +0200 Message-Id: <20210816082716.21193-2-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210816082716.21193-1-krzysztof.kozlowski@canonical.com> References: <20210816082716.21193-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org All bits of STATUS register are already defined (see STATUS_SMN_BIT and further) so there is no need to define status SoC threshold min/max values one more time. Signed-off-by: Krzysztof Kozlowski --- drivers/power/supply/max17042_battery.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c index 858ae97600d4..936e43fb710b 100644 --- a/drivers/power/supply/max17042_battery.c +++ b/drivers/power/supply/max17042_battery.c @@ -36,8 +36,6 @@ /* Interrupt mask bits */ #define CONFIG_ALRT_BIT_ENBL (1 << 2) -#define STATUS_INTR_SOCMIN_BIT (1 << 10) -#define STATUS_INTR_SOCMAX_BIT (1 << 14) #define VFSOC0_LOCK 0x0000 #define VFSOC0_UNLOCK 0x0080 @@ -875,8 +873,7 @@ static irqreturn_t max17042_thread_handler(int id, void *dev) if (ret) return IRQ_HANDLED; - if ((val & STATUS_INTR_SOCMIN_BIT) || - (val & STATUS_INTR_SOCMAX_BIT)) { + if ((val & STATUS_SMN_BIT) || (val & STATUS_SMX_BIT)) { dev_info(&chip->client->dev, "SOC threshold INTR\n"); max17042_set_soc_threshold(chip, 1); } From patchwork Mon Aug 16 08:27:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 12437949 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 F3C86C4320E for ; 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Mon, 16 Aug 2021 01:27:58 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyqJhwkRNUMN2vnocd+GAYi0oAHKop6/HTG7JKSYREFONHvZ2PTbnYhmsrS/6vdD/O+TlQA2A== X-Received: by 2002:a50:d4cf:: with SMTP id e15mr18634191edj.2.1629102478131; Mon, 16 Aug 2021 01:27:58 -0700 (PDT) Received: from localhost.localdomain ([86.32.42.198]) by smtp.gmail.com with ESMTPSA id ay20sm4469605edb.91.2021.08.16.01.27.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Aug 2021 01:27:57 -0700 (PDT) From: Krzysztof Kozlowski To: Sebastian Reichel , Rob Herring , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Sebastian Krzyszkowiak , Christophe JAILLET , Hans de Goede , Krzysztof Kozlowski Subject: [PATCH 3/3] dt-bindings: power: supply: max17042: describe interrupt Date: Mon, 16 Aug 2021 10:27:16 +0200 Message-Id: <20210816082716.21193-3-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210816082716.21193-1-krzysztof.kozlowski@canonical.com> References: <20210816082716.21193-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The Maxim 17042-family of fuel gauges are often embedded in other Maxim chips, e.g. in Maxim 77693 which is a companion power management IC. In such designs there might be actually two interrupts: - INTB signaling change from charger, flash or MUIC, - ALERT signaling change from fuel gauge. Describe the interrupt in bindings to make it clear it is about the fuel gauge ALERT interrupt, not the INT. Signed-off-by: Krzysztof Kozlowski Acked-by: Rob Herring --- .../devicetree/bindings/power/supply/maxim,max17042.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/power/supply/maxim,max17042.yaml b/Documentation/devicetree/bindings/power/supply/maxim,max17042.yaml index c70f05ea6d27..95beae958096 100644 --- a/Documentation/devicetree/bindings/power/supply/maxim,max17042.yaml +++ b/Documentation/devicetree/bindings/power/supply/maxim,max17042.yaml @@ -25,6 +25,8 @@ properties: interrupts: maxItems: 1 + description: | + The ALRT pin, an open-drain interrupt. maxim,rsns-microohm: $ref: /schemas/types.yaml#/definitions/uint32