From patchwork Mon May 27 02:22:56 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matheus Castello X-Patchwork-Id: 10961999 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9A8A0933 for ; Mon, 27 May 2019 02:47:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8953028AC1 for ; Mon, 27 May 2019 02:47:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7D06D28AC6; Mon, 27 May 2019 02:47:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 13EED28AC1 for ; Mon, 27 May 2019 02:47:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726062AbfE0Crw (ORCPT ); Sun, 26 May 2019 22:47:52 -0400 Received: from gateway32.websitewelcome.com ([192.185.145.119]:11378 "EHLO gateway32.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725923AbfE0Crw (ORCPT ); Sun, 26 May 2019 22:47:52 -0400 X-Greylist: delayed 1477 seconds by postgrey-1.27 at vger.kernel.org; Sun, 26 May 2019 22:47:51 EDT Received: from cm17.websitewelcome.com (cm17.websitewelcome.com [100.42.49.20]) by gateway32.websitewelcome.com (Postfix) with ESMTP id CC8CB2D7B7 for ; Sun, 26 May 2019 21:23:13 -0500 (CDT) Received: from br164.hostgator.com.br ([192.185.176.180]) by cmsmtp with SMTP id V5I9hJVfk90onV5I9hN3ZN; Sun, 26 May 2019 21:23:13 -0500 X-Authority-Reason: nr=8 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=castello.eng.br; s=default; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=1wVE5xkruKE7AkDu9vtTUu9rgNnlV7zNF6bQeuJd2IM=; b=zjeEKHFkaz9zbTstnucDBMTt4S +OMIPIIlUXW21Cg94mr6SxsLOkd11thsSLDBWiEx0OOFnYFyW6pvEn3fFDrQSBh7uPpHIKGX1XaAb enT6ZW00w55p58qyWgzZA3D0UT4OyQG4L9V49gaxZxgseNwfKIMLd8ovOpYcEW7GGrhbbDLcGcStK FOOWqIrrdHyrmN/y0Uj3szwSM0G6KH8FrbOs2bcwjHadHa2MIrahZGF15RjHfpOR1YdNXLIGuKIF6 VvTvcsZemM9E/8jMd5BEbdX6KPNy6C/xnOZdURRj7OCR9qQVV4Q0PmQ/cAsy7CcV+sSI29LcLYKoK 3GUdfEMw==; Received: from [177.34.20.96] (port=57660 helo=castello.castello.in) by br164.hostgator.com.br with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.91) (envelope-from ) id 1hV5I8-003JNX-Po; Sun, 26 May 2019 23:23:13 -0300 From: Matheus Castello To: sre@kernel.org, krzk@kernel.org, robh+dt@kernel.org Cc: mark.rutland@arm.com, cw00.choi@samsung.com, b.zolnierkie@samsung.com, lee.jones@linaro.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Matheus Castello Subject: [PATCH v3 3/5] power: supply: max17040: Config alert SOC low level threshold from FDT Date: Sun, 26 May 2019 23:22:56 -0300 Message-Id: <20190527022258.32748-4-matheus@castello.eng.br> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190527022258.32748-1-matheus@castello.eng.br> References: <20190527022258.32748-1-matheus@castello.eng.br> MIME-Version: 1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - br164.hostgator.com.br X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - castello.eng.br X-BWhitelist: no X-Source-IP: 177.34.20.96 X-Source-L: No X-Exim-ID: 1hV5I8-003JNX-Po X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (castello.castello.in) [177.34.20.96]:57660 X-Source-Auth: matheus@castello.eng.br X-Email-Count: 48 X-Source-Cap: Y2FzdGUyNDg7Y2FzdGUyNDg7YnIxNjQuaG9zdGdhdG9yLmNvbS5icg== X-Local-Domain: yes Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP For configuration of fuel gauge alert for a low level state of charge interrupt we add a function to config level threshold and a device tree binding property to set it in flatned device tree node. Now we can use "maxim,alert-low-soc-level" property with the values from 1% up to 32% to configure alert interrupt threshold. Signed-off-by: Matheus Castello --- drivers/power/supply/max17040_battery.c | 52 +++++++++++++++++++++++-- 1 file changed, 49 insertions(+), 3 deletions(-) -- 2.20.1 diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c index b7433e9ca7c2..2f4851608cfe 100644 --- a/drivers/power/supply/max17040_battery.c +++ b/drivers/power/supply/max17040_battery.c @@ -29,6 +29,9 @@ #define MAX17040_DELAY 1000 #define MAX17040_BATTERY_FULL 95 +#define MAX17040_ATHD_MASK 0xFFC0 +#define MAX17040_ATHD_DEFAULT_POWER_UP 4 + struct max17040_chip { struct i2c_client *client; struct delayed_work work; @@ -43,6 +46,8 @@ struct max17040_chip { int soc; /* State Of Charge */ int status; + /* Low alert threshold from 32% to 1% of the State of Charge */ + u32 low_soc_alert_threshold; }; static int max17040_get_property(struct power_supply *psy, @@ -99,6 +104,28 @@ static void max17040_reset(struct i2c_client *client) max17040_write_reg(client, MAX17040_CMD, 0x0054); } +static int max17040_set_low_soc_threshold_alert(struct i2c_client *client, + u32 level) +{ + int ret; + u16 data; + + /* check if level is between 1% and 32% */ + if (level > 0 && level < 33) { + level = 32 - level; + data = max17040_read_reg(client, MAX17040_RCOMP); + /* clear the alrt bit and set LSb 5 bits */ + data &= MAX17040_ATHD_MASK; + data |= level; + max17040_write_reg(client, MAX17040_RCOMP, data); + ret = 0; + } else { + ret = -EINVAL; + } + + return ret; +} + static void max17040_get_vcell(struct i2c_client *client) { struct max17040_chip *chip = i2c_get_clientdata(client); @@ -161,6 +188,16 @@ static void max17040_get_status(struct i2c_client *client) chip->status = POWER_SUPPLY_STATUS_FULL; } +static void max17040_get_of_data(struct max17040_chip *chip) +{ + struct device *dev = &chip->client->dev; + struct device_node *np = dev->of_node; + + if (of_property_read_u32(np, "maxim,alert-low-soc-level", + &chip->low_soc_alert_threshold)) + chip->low_soc_alert_threshold = MAX17040_ATHD_DEFAULT_POWER_UP; +} + static void max17040_check_changes(struct i2c_client *client) { max17040_get_vcell(client); @@ -226,6 +263,7 @@ static int max17040_probe(struct i2c_client *client, chip->client = client; chip->pdata = client->dev.platform_data; + max17040_get_of_data(chip); i2c_set_clientdata(client, chip); psy_cfg.drv_data = chip; @@ -243,12 +281,20 @@ static int max17040_probe(struct i2c_client *client, /* check interrupt */ if (client->irq) { int ret; - unsigned int flags; + + ret = max17040_set_low_soc_threshold_alert(client, + chip->low_soc_alert_threshold); + if (ret) { + dev_err(&client->dev, + "Failed to set low SOC alert: err %d\n", + ret); + return ret; + } dev_info(&client->dev, "IRQ: enabled\n"); - flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT; ret = devm_request_threaded_irq(&client->dev, client->irq, NULL, - max17040_thread_handler, flags, + max17040_thread_handler, + (client->flags | IRQF_ONESHOT), chip->battery->desc->name, chip);