From patchwork Wed Apr 28 04:08:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ikjoon Jang X-Patchwork-Id: 12227925 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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 B073AC433B4 for ; Wed, 28 Apr 2021 04:08:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 766106140C for ; Wed, 28 Apr 2021 04:08:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229992AbhD1EIz (ORCPT ); Wed, 28 Apr 2021 00:08:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229451AbhD1EIz (ORCPT ); Wed, 28 Apr 2021 00:08:55 -0400 Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6B20AC06175F for ; Tue, 27 Apr 2021 21:08:11 -0700 (PDT) Received: by mail-pf1-x436.google.com with SMTP id 10so294689pfl.1 for ; Tue, 27 Apr 2021 21:08:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=49Tw5cUJuX6oeFz3PRwhMmj9KjPAeUSyIE1t+N81mMw=; b=mezUmNSD/qK2Y7plx/lic4P4bFXVROSkMcyEz603lJAYpVY+GHgCiZiaExnV0yLT2t KkVe+AkOJO7UAjvckTN9mg+kGPYDVAL3QvWnK4P7lqE2L1GCQnikA4p/VXNYY78ysh1R Ake87yCYofQOsJvSNuGwk+RAwneOl8ZJcwUvs= 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=49Tw5cUJuX6oeFz3PRwhMmj9KjPAeUSyIE1t+N81mMw=; b=WxtD1HUcvfdaNEju8e9jXUt6eUUV+0Fc494Y9oRej32P3sClyv5TrKvx9+ywriZgU3 2BllqqKQ1ttF8JWzpi4pzPHgazISw9RSbEKyEM+LKzgsgv8Q8BmjGZvK5Z9sX7KwFIzJ L3ctyXu5yGWL/dDnE+8PMJ3NYnMvaKjzJP9sV583z8q+WHZ1BmQ1FXlneyb3BCKXFe/E ZJnJrMGFzUuBa03YBpAHXObXWOUSgISKnAvO/kUbaEghnvtgkxC/FNa3v0zEPxIqL9c4 ATvdkXsRNYp50a77MtBoB4eG+3H8OuCc+1B4CNZa++TvMhAJvAdRGxNoMbaqDug/3Nty M1UA== X-Gm-Message-State: AOAM530jjtRdWAcdsAe8A0rX5mGRKxcwtV4977Uly7HGmDOyJ7r6VGld vQJeaHiqkA7b3nMptcdsbi3q1QEG8W7jrY7u X-Google-Smtp-Source: ABdhPJwsPXokv0v7xVnwkd4bBIwSyXspCw2a8jEgXWEBmznSz6rNWnrSxWbDyroy2mAe1pwaPpNsyw== X-Received: by 2002:a62:8f4a:0:b029:241:fc67:d425 with SMTP id n71-20020a628f4a0000b0290241fc67d425mr27207113pfd.21.1619582890582; Tue, 27 Apr 2021 21:08:10 -0700 (PDT) Received: from ikjn-p920.tpe.corp.google.com ([2401:fa00:1:b:4cea:d9a4:e0be:d3f6]) by smtp.gmail.com with ESMTPSA id f1sm3456803pjt.50.2021.04.27.21.08.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Apr 2021 21:08:10 -0700 (PDT) From: Ikjoon Jang To: linux-pm@vger.kernel.org, Sebastian Reichel Cc: Hsinyi Wang , Ikjoon Jang , linux-kernel@vger.kernel.org Subject: [PATCH v2] power: supply: sbs-battery: cache constant string properties Date: Wed, 28 Apr 2021 12:08:02 +0800 Message-Id: <20210428040802.3266187-1-ikjn@chromium.org> X-Mailer: git-send-email 2.31.1.498.g6c1eba8ee3d-goog In-Reply-To: <20210427093754.3000087-1-ikjn@chromium.org> References: <20210427093754.3000087-1-ikjn@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Currently sbs-battery supports three string properties - manufacturer, model_name, and chemistry. Buffers for those properties are currently defined as global variables. This patch moves those global variables into struct sbs_info and cache/reuse them as they are all constant values. Signed-off-by: Ikjoon Jang Tested-by: Hsin-Yi Wang --- Changes in v2: - change function name of sbs_get_battery_string_property() to sbs_get_constant_string() - use cached string properties - use cached technology integer value in sbs_get_chemistry() drivers/power/supply/sbs-battery.c | 140 +++++++++++++++++------------ 1 file changed, 82 insertions(+), 58 deletions(-) diff --git a/drivers/power/supply/sbs-battery.c b/drivers/power/supply/sbs-battery.c index 4bf92831cb06..414de9bc47bf 100644 --- a/drivers/power/supply/sbs-battery.c +++ b/drivers/power/supply/sbs-battery.c @@ -188,6 +188,14 @@ static const enum power_supply_property sbs_properties[] = { /* Supports special manufacturer commands from TI BQ20Z65 and BQ20Z75 IC. */ #define SBS_FLAGS_TI_BQ20ZX5 BIT(0) +static const enum power_supply_property string_properties[] = { + POWER_SUPPLY_PROP_TECHNOLOGY, + POWER_SUPPLY_PROP_MANUFACTURER, + POWER_SUPPLY_PROP_MODEL_NAME, +}; + +#define NR_STRING_BUFFERS ARRAY_SIZE(string_properties) + struct sbs_info { struct i2c_client *client; struct power_supply *power_supply; @@ -201,11 +209,22 @@ struct sbs_info { struct delayed_work work; struct mutex mode_lock; u32 flags; + int technology; + char strings[NR_STRING_BUFFERS][I2C_SMBUS_BLOCK_MAX + 1]; }; -static char model_name[I2C_SMBUS_BLOCK_MAX + 1]; -static char manufacturer[I2C_SMBUS_BLOCK_MAX + 1]; -static char chemistry[I2C_SMBUS_BLOCK_MAX + 1]; +static char *sbs_get_string_buf(struct sbs_info *chip, + enum power_supply_property psp) +{ + int i = 0; + + for (i = 0; i < NR_STRING_BUFFERS; i++) + if (string_properties[i] == psp) + return chip->strings[i]; + + return ERR_PTR(-EINVAL); +} + static bool force_load; static int sbs_read_word_data(struct i2c_client *client, u8 address); @@ -639,17 +658,45 @@ static int sbs_get_battery_property(struct i2c_client *client, return 0; } -static int sbs_get_battery_string_property(struct i2c_client *client, - int reg_offset, enum power_supply_property psp, char *val) +static int sbs_get_property_index(struct i2c_client *client, + enum power_supply_property psp) { - s32 ret; + int count; + + for (count = 0; count < ARRAY_SIZE(sbs_data); count++) + if (psp == sbs_data[count].psp) + return count; - ret = sbs_read_string_data(client, sbs_data[reg_offset].addr, val); + dev_warn(&client->dev, + "%s: Invalid Property - %d\n", __func__, psp); - if (ret < 0) - return ret; + return -EINVAL; +} - return 0; +static const char *sbs_get_constant_string(struct sbs_info *chip, + enum power_supply_property psp) +{ + int ret; + char *buf; + u8 addr; + + buf = sbs_get_string_buf(chip, psp); + if (IS_ERR(buf)) + return buf; + + if (!buf[0]) { + ret = sbs_get_property_index(chip->client, psp); + if (ret < 0) + return ERR_PTR(ret); + + addr = sbs_data[ret].addr; + + ret = sbs_read_string_data(chip->client, addr, buf); + if (ret < 0) + return ERR_PTR(ret); + } + + return buf; } static void sbs_unit_adjustment(struct i2c_client *client, @@ -772,48 +819,34 @@ static int sbs_get_battery_serial_number(struct i2c_client *client, return 0; } -static int sbs_get_property_index(struct i2c_client *client, - enum power_supply_property psp) -{ - int count; - for (count = 0; count < ARRAY_SIZE(sbs_data); count++) - if (psp == sbs_data[count].psp) - return count; - - dev_warn(&client->dev, - "%s: Invalid Property - %d\n", __func__, psp); - - return -EINVAL; -} - -static int sbs_get_chemistry(struct i2c_client *client, +static int sbs_get_chemistry(struct sbs_info *chip, union power_supply_propval *val) { - enum power_supply_property psp = POWER_SUPPLY_PROP_TECHNOLOGY; - int ret; + const char *chemistry; - ret = sbs_get_property_index(client, psp); - if (ret < 0) - return ret; + if (chip->technology >= POWER_SUPPLY_TECHNOLOGY_UNKNOWN) + return chip->technology; - ret = sbs_get_battery_string_property(client, ret, psp, - chemistry); - if (ret < 0) - return ret; + chemistry = sbs_get_constant_string(chip, POWER_SUPPLY_PROP_TECHNOLOGY); + + if (IS_ERR(chemistry)) + return PTR_ERR(chemistry); if (!strncasecmp(chemistry, "LION", 4)) - val->intval = POWER_SUPPLY_TECHNOLOGY_LION; + chip->technology = POWER_SUPPLY_TECHNOLOGY_LION; else if (!strncasecmp(chemistry, "LiP", 3)) - val->intval = POWER_SUPPLY_TECHNOLOGY_LIPO; + chip->technology = POWER_SUPPLY_TECHNOLOGY_LIPO; else if (!strncasecmp(chemistry, "NiCd", 4)) - val->intval = POWER_SUPPLY_TECHNOLOGY_NiCd; + chip->technology = POWER_SUPPLY_TECHNOLOGY_NiCd; else if (!strncasecmp(chemistry, "NiMH", 4)) - val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH; + chip->technology = POWER_SUPPLY_TECHNOLOGY_NiMH; else - val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN; + chip->technology = POWER_SUPPLY_TECHNOLOGY_UNKNOWN; - if (val->intval == POWER_SUPPLY_TECHNOLOGY_UNKNOWN) - dev_warn(&client->dev, "Unknown chemistry: %s\n", chemistry); + if (chip->technology == POWER_SUPPLY_TECHNOLOGY_UNKNOWN) + dev_warn(&chip->client->dev, "Unknown chemistry: %s\n", chemistry); + + val->intval = chip->technology; return 0; } @@ -857,6 +890,7 @@ static int sbs_get_property(struct power_supply *psy, int ret = 0; struct sbs_info *chip = power_supply_get_drvdata(psy); struct i2c_client *client = chip->client; + const char *str; if (chip->gpio_detect) { ret = gpiod_get_value_cansleep(chip->gpio_detect); @@ -882,7 +916,7 @@ static int sbs_get_property(struct power_supply *psy, break; case POWER_SUPPLY_PROP_TECHNOLOGY: - ret = sbs_get_chemistry(client, val); + ret = sbs_get_chemistry(chip, val); if (ret < 0) break; @@ -934,23 +968,12 @@ static int sbs_get_property(struct power_supply *psy, break; case POWER_SUPPLY_PROP_MODEL_NAME: - ret = sbs_get_property_index(client, psp); - if (ret < 0) - break; - - ret = sbs_get_battery_string_property(client, ret, psp, - model_name); - val->strval = model_name; - break; - case POWER_SUPPLY_PROP_MANUFACTURER: - ret = sbs_get_property_index(client, psp); - if (ret < 0) - break; - - ret = sbs_get_battery_string_property(client, ret, psp, - manufacturer); - val->strval = manufacturer; + str = sbs_get_constant_string(chip, psp); + if (IS_ERR(str)) + ret = PTR_ERR(str); + else + val->strval = str; break; case POWER_SUPPLY_PROP_MANUFACTURE_YEAR: @@ -1097,6 +1120,7 @@ static int sbs_probe(struct i2c_client *client) psy_cfg.of_node = client->dev.of_node; psy_cfg.drv_data = chip; chip->last_state = POWER_SUPPLY_STATUS_UNKNOWN; + chip->technology = -1; mutex_init(&chip->mode_lock); /* use pdata if available, fall back to DT properties,