From patchwork Wed May 26 11:16:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ikjoon Jang X-Patchwork-Id: 448590 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=-19.1 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 A4F09C2B9F7 for ; Wed, 26 May 2021 11:16:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 84B00613BD for ; Wed, 26 May 2021 11:16:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234271AbhEZLRk (ORCPT ); Wed, 26 May 2021 07:17:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45462 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234267AbhEZLRj (ORCPT ); Wed, 26 May 2021 07:17:39 -0400 Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 878EEC061756 for ; Wed, 26 May 2021 04:16:08 -0700 (PDT) Received: by mail-pl1-x62b.google.com with SMTP id a7so445080plh.3 for ; Wed, 26 May 2021 04:16:08 -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:mime-version :content-transfer-encoding; bh=PzgzBohWrJMIpaalYi9wVNZWYy1JIhwVUerboOtOB4k=; b=CEt5v+SorJdfAraGqPb7yeOlNlcL3Vxj6rfFOO/zd8M4DjQhOQC/smBIqUEvb07VHJ h2R/tb0tWyY+eIybisTBXZdds1M6hyW9GQNYB6VkV4mXsqdb8hDQeZOde64ybjNEpBOX VwEQDCHRXzL9NMABlqC2QppDKJFXv/MPwE9Ho= 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=PzgzBohWrJMIpaalYi9wVNZWYy1JIhwVUerboOtOB4k=; b=PmYgJ5tOEVKF+a/P7ULsINGwcX3ZzPlzoGBbktpKgc4Od7Wx6p0f7dR3zkaCQrtnMu mYgWWwqmqenPqM+xerfrSEyL0qf4PonyIuqSpt/qsxN+eNbm71mOdy6+8jLH0KdnNvkX uLg7Ryp1lrLfKMckz4H3I5JL3tde41Y/lzEL6pcrXQtTFONQBxII3Tl4BJ5qWdUz+YJk LoaHiFUz0t0/Qt8nFTR9yOL2ZI/zEY5Hs9bDfcUtZbqeAGv050VuEGFFE07kaU1xsvpT 3WBK4uUw99MBln1/vaIeVZMyjl6FrQ8YC9tTPBgioj0sq0BxWKPOcJeDhMSBPkLmnNQw kB2w== X-Gm-Message-State: AOAM533Y6ccDhzbGt0XhyR8/0q6YF+CzPyKagJHBPuucSbeh3Tqile6c +QWnKYyeaob0/mAT0A9x4W/2BZfQm+QRWw== X-Google-Smtp-Source: ABdhPJyvdqD5ohTkONc85sToaubCGGQ9T5nt6Zvm+gr08l+qhMki364te3f9RlxGeN0dbrs/qGe2Jw== X-Received: by 2002:a17:90a:1d0c:: with SMTP id c12mr16865372pjd.122.1622027767733; Wed, 26 May 2021 04:16:07 -0700 (PDT) Received: from ikjn-p920.tpe.corp.google.com ([2401:fa00:1:b:37d6:8e9f:c791:4d9]) by smtp.gmail.com with ESMTPSA id v2sm15398362pfm.134.2021.05.26.04.16.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 May 2021 04:16:07 -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 v4] power: supply: sbs-battery: cache constant string properties Date: Wed, 26 May 2021 19:16:04 +0800 Message-Id: <20210526191600.v4.1.I446881dabe094fff375847593be87ec2624f587f@changeid> X-Mailer: git-send-email 2.31.1.818.g46aad6cb9e-goog 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 v4: - Fix a build error from patch manipulation Changes in v3: - Invalidate cached properties upon update_presence(!present) - Fix a bug in reading chemistry Changes in v2: - change function name of sbs_get_battery_string_property() to sbs_get_constant_string() - use cached string properties - use cached technology value in sbs_get_chemistry() drivers/power/supply/sbs-battery.c | 153 ++++++++++++++++++----------- 1 file changed, 95 insertions(+), 58 deletions(-) diff --git a/drivers/power/supply/sbs-battery.c b/drivers/power/supply/sbs-battery.c index b6a538ebb378..b6ee3a14576f 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 +209,32 @@ 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 void sbs_invalidate_cached_props(struct sbs_info *chip) +{ + int i = 0; + + chip->technology = -1; + + for (i = 0; i < NR_STRING_BUFFERS; i++) + chip->strings[i][0] = 0; +} + static bool force_load; static int sbs_read_word_data(struct i2c_client *client, u8 address); @@ -243,6 +272,7 @@ static int sbs_update_presence(struct sbs_info *chip, bool is_present) chip->is_present = false; /* Disable PEC when no device is present */ client->flags &= ~I2C_CLIENT_PEC; + sbs_invalidate_cached_props(chip); return 0; } @@ -639,17 +669,45 @@ 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; - ret = sbs_read_string_data(client, sbs_data[reg_offset].addr, val); + for (count = 0; count < ARRAY_SIZE(sbs_data); count++) + if (psp == sbs_data[count].psp) + return count; - if (ret < 0) - return ret; + dev_warn(&client->dev, + "%s: Invalid Property - %d\n", __func__, psp); - return 0; + return -EINVAL; +} + +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 +830,36 @@ 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 != -1) { + val->intval = chip->technology; + return 0; + } - 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 (chip->technology == POWER_SUPPLY_TECHNOLOGY_UNKNOWN) + dev_warn(&chip->client->dev, "Unknown chemistry: %s\n", chemistry); - if (val->intval == POWER_SUPPLY_TECHNOLOGY_UNKNOWN) - dev_warn(&client->dev, "Unknown chemistry: %s\n", chemistry); + val->intval = chip->technology; return 0; } @@ -857,6 +903,7 @@ 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 +929,7 @@ 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 +981,12 @@ 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 +1133,7 @@ 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; + sbs_invalidate_cached_props(chip); mutex_init(&chip->mode_lock); /* use pdata if available, fall back to DT properties,