From patchwork Wed Jun 24 15:56:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Iskren Chernev X-Patchwork-Id: 211749 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=-10.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 8F48FC433DF for ; Wed, 24 Jun 2020 15:57:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6777A20738 for ; Wed, 24 Jun 2020 15:57:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="rUBalvyy" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404651AbgFXP5M (ORCPT ); Wed, 24 Jun 2020 11:57:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36000 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404718AbgFXP5C (ORCPT ); Wed, 24 Jun 2020 11:57:02 -0400 Received: from mail-wr1-x443.google.com (mail-wr1-x443.google.com [IPv6:2a00:1450:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E4E60C061573; Wed, 24 Jun 2020 08:57:01 -0700 (PDT) Received: by mail-wr1-x443.google.com with SMTP id r12so2758327wrj.13; Wed, 24 Jun 2020 08:57:01 -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=0fWqoRxWBCqdBHBS2H2/Nb85DBqENZwJYZ563FQxmmA=; b=rUBalvyyjuzbg5xoceVShBhFF0BzgWQFg0AOoc2qHtRNRvowsiWu2pqejfNGvdB8Jx PqlgYIvst/jtIVEav/2Prz3BcJM0RS+lWSQL/7VO3UzP/EDXVnxcC/Psp89gK1j2+kRg F500TJuLDZ5cPhwEtUA2yOW26s3nYXMcvaNrVCFN9pps60OzDa2NOdIowPfMyx2SFTpj v9dN9zXh94YjcZOgYwrRtTJMojpU85Sq6EOnjVZs9l/Vr5UpAQ0TE9O+U9l9F1Krk9gO vZnzpn1YJOG9lqEvkXLWMn19OdHhlR7vLHIa/CgCAuv/9JecmxVztty5ZJHQSNMFnkuH TL3A== 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=0fWqoRxWBCqdBHBS2H2/Nb85DBqENZwJYZ563FQxmmA=; b=oofsVO7uUu+Xy5FvPIapjPoiDJYO183T6a8ieLi86j0++ivTuuLCGjVHlP6ou1nSRA NFgCt+15cEfoG6zrjQCQ44ckMCmQSMsvQS1BLQttC2vF++aXFPqgONHTEcDElz6NocnD 1JoWMH/NiByIxBrIdcOtuiWskc5qIqUypHo/xXs/73BZAY+qj5K4m4HFy7wjZlE8r52h ptLyD1EP7Et96avb7xvQC4w9RrA7k7yWHlKX2M9cHuY/+v66DF5mgS8BD6Q5SDAjINgT XA/taG+IKzT99afwO1jJym2PhKG0biV8fX3QbhSWqbBbUKxjM5po8jt+WknPFIZIJ+IN esVg== X-Gm-Message-State: AOAM533w4QcbgcCSquNWY2UgZfv1VzwN/VqWPazsVkqtisq/wc5FZRaY iJKNyibG7+0uBi7HFsRTR54= X-Google-Smtp-Source: ABdhPJxD6+qpz0n4qf0xCNR0wrqQdIU/JLb07XUrL0PuZCeycXAeQEX77+AbjTC4v/5AjrgguvFV3Q== X-Received: by 2002:a5d:4008:: with SMTP id n8mr31143871wrp.82.1593014220595; Wed, 24 Jun 2020 08:57:00 -0700 (PDT) Received: from localhost ([213.191.183.145]) by smtp.gmail.com with ESMTPSA id u186sm8951064wmu.10.2020.06.24.08.56.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 24 Jun 2020 08:57:00 -0700 (PDT) From: Iskren Chernev To: Sebastian Reichel , Rob Herring Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, Jonathan Bakker , Vladimir Barinov , Iskren Chernev Subject: [PATCH v3 6/6] power: supply: max17040: Support soc alert Date: Wed, 24 Jun 2020 18:56:33 +0300 Message-Id: <20200624155633.3557401-7-iskren.chernev@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200624155633.3557401-1-iskren.chernev@gmail.com> References: <20200624155633.3557401-1-iskren.chernev@gmail.com> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org max17048 and max17049 support SOC alerts (interrupts when battery capacity changes by +/- 1%). At the moment the driver polls for changes every second. Using the alerts removes the need for polling. Signed-off-by: Iskren Chernev --- drivers/power/supply/max17040_battery.c | 82 ++++++++++++++++++++++--- 1 file changed, 73 insertions(+), 9 deletions(-) diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c index 54393f411211e..4425411775f26 100644 --- a/drivers/power/supply/max17040_battery.c +++ b/drivers/power/supply/max17040_battery.c @@ -25,6 +25,7 @@ #define MAX17040_MODE 0x06 #define MAX17040_VER 0x08 #define MAX17040_CONFIG 0x0C +#define MAX17040_STATUS 0x1A #define MAX17040_CMD 0xFE @@ -33,7 +34,10 @@ #define MAX17040_RCOMP_DEFAULT 0x9700 #define MAX17040_ATHD_MASK 0x3f +#define MAX17040_ALSC_MASK 0x40 #define MAX17040_ATHD_DEFAULT_POWER_UP 4 +#define MAX17040_STATUS_HD_MASK 0x1000 +#define MAX17040_STATUS_SC_MASK 0x2000 #define MAX17040_CFG_RCOMP_MASK 0xff00 enum chip_id { @@ -55,6 +59,7 @@ struct chip_data { u16 vcell_div; u8 has_low_soc_alert; u8 rcomp_bytes; + u8 has_soc_alert; }; static struct chip_data max17040_family[] = { @@ -65,6 +70,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 1, .has_low_soc_alert = 0, .rcomp_bytes = 2, + .has_soc_alert = 0, }, [ID_MAX17041] = { .reset_val = 0x0054, @@ -73,6 +79,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 1, .has_low_soc_alert = 0, .rcomp_bytes = 2, + .has_soc_alert = 0, }, [ID_MAX17043] = { .reset_val = 0x0054, @@ -81,6 +88,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 1, .has_low_soc_alert = 1, .rcomp_bytes = 1, + .has_soc_alert = 0, }, [ID_MAX17044] = { .reset_val = 0x0054, @@ -89,6 +97,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 1, .has_low_soc_alert = 1, .rcomp_bytes = 1, + .has_soc_alert = 0, }, [ID_MAX17048] = { .reset_val = 0x5400, @@ -97,6 +106,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 8, .has_low_soc_alert = 1, .rcomp_bytes = 1, + .has_soc_alert = 1, }, [ID_MAX17049] = { .reset_val = 0x5400, @@ -105,6 +115,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 4, .has_low_soc_alert = 1, .rcomp_bytes = 1, + .has_soc_alert = 1, }, [ID_MAX17058] = { .reset_val = 0x5400, @@ -113,6 +124,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 8, .has_low_soc_alert = 1, .rcomp_bytes = 1, + .has_soc_alert = 0, }, [ID_MAX17059] = { .reset_val = 0x5400, @@ -121,6 +133,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 4, .has_low_soc_alert = 1, .rcomp_bytes = 1, + .has_soc_alert = 0, }, }; @@ -156,6 +169,12 @@ static int max17040_set_low_soc_alert(struct max17040_chip *chip, u32 level) MAX17040_ATHD_MASK, level); } +static int max17040_set_soc_alert(struct max17040_chip *chip, bool enable) +{ + return regmap_update_bits(chip->regmap, MAX17040_CONFIG, + MAX17040_ALSC_MASK, enable ? MAX17040_ALSC_MASK : 0); +} + static int max17040_set_rcomp(struct max17040_chip *chip, u16 rcomp) { u16 mask = chip->data.rcomp_bytes == 2 ? @@ -298,11 +317,33 @@ static void max17040_work(struct work_struct *work) max17040_queue_work(chip); } +/* Returns true if alert cause was SOC change, not low SOC */ +static bool max17040_handle_soc_alert(struct max17040_chip *chip) +{ + bool ret = true; + u32 data; + + regmap_read(chip->regmap, MAX17040_STATUS, &data); + + if (data & MAX17040_STATUS_HD_MASK) { + // this alert was caused by low soc + ret = false; + } + if (data & MAX17040_STATUS_SC_MASK) { + // soc change bit -- deassert to mark as handled + regmap_write(chip->regmap, MAX17040_STATUS, + data & ~MAX17040_STATUS_SC_MASK); + } + + return ret; +} + static irqreturn_t max17040_thread_handler(int id, void *dev) { struct max17040_chip *chip = dev; - dev_warn(&chip->client->dev, "IRQ: Alert battery low level"); + if (!(chip->data.has_soc_alert && max17040_handle_soc_alert(chip))) + dev_warn(&chip->client->dev, "IRQ: Alert battery low level\n"); /* read registers */ max17040_check_changes(chip); @@ -384,6 +425,7 @@ static int max17040_probe(struct i2c_client *client, struct power_supply_config psy_cfg = {}; struct max17040_chip *chip; enum chip_id chip_id; + bool enable_irq = false; int ret; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) @@ -434,6 +476,27 @@ static int max17040_probe(struct i2c_client *client, return ret; } + enable_irq = true; + } + + if (client->irq && chip->data.has_soc_alert) { + ret = max17040_set_soc_alert(chip, 1); + if (ret) { + dev_err(&client->dev, + "Failed to set SOC alert: err %d\n", ret); + return ret; + } + enable_irq = true; + } else { + /* soc alerts negate the need for polling */ + INIT_DEFERRABLE_WORK(&chip->work, max17040_work); + ret = devm_add_action(&client->dev, max17040_stop_work, chip); + if (ret) + return ret; + max17040_queue_work(chip); + } + + if (enable_irq) { ret = max17040_enable_alert_irq(chip); if (ret) { client->irq = 0; @@ -442,12 +505,6 @@ static int max17040_probe(struct i2c_client *client, } } - INIT_DEFERRABLE_WORK(&chip->work, max17040_work); - ret = devm_add_action(&client->dev, max17040_stop_work, chip); - if (ret) - return ret; - max17040_queue_work(chip); - return 0; } @@ -458,7 +515,11 @@ static int max17040_suspend(struct device *dev) struct i2c_client *client = to_i2c_client(dev); struct max17040_chip *chip = i2c_get_clientdata(client); - cancel_delayed_work(&chip->work); + if (client->irq && chip->data.has_soc_alert) + // disable soc alert to prevent wakeup + max17040_set_soc_alert(chip, 0); + else + cancel_delayed_work(&chip->work); if (client->irq && device_may_wakeup(dev)) enable_irq_wake(client->irq); @@ -474,7 +535,10 @@ static int max17040_resume(struct device *dev) if (client->irq && device_may_wakeup(dev)) disable_irq_wake(client->irq); - max17040_queue_work(chip); + if (client->irq && chip->data.has_soc_alert) + max17040_set_soc_alert(chip, 1); + else + max17040_queue_work(chip); return 0; }