From patchwork Mon Oct 19 22:34:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Packham X-Patchwork-Id: 11845367 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5F2BB14B7 for ; Mon, 19 Oct 2020 22:34:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F287322284 for ; Mon, 19 Oct 2020 22:34:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=alliedtelesis.co.nz header.i=@alliedtelesis.co.nz header.b="iPMcb/W4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388239AbgJSWed (ORCPT ); Mon, 19 Oct 2020 18:34:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33008 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388234AbgJSWed (ORCPT ); Mon, 19 Oct 2020 18:34:33 -0400 Received: from gate2.alliedtelesis.co.nz (gate2.alliedtelesis.co.nz [IPv6:2001:df5:b000:5::4]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EFADCC0613D4 for ; Mon, 19 Oct 2020 15:34:32 -0700 (PDT) Received: from mmarshal3.atlnz.lc (mmarshal3.atlnz.lc [10.32.18.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by gate2.alliedtelesis.co.nz (Postfix) with ESMTPS id 1F860806B7; Tue, 20 Oct 2020 11:34:28 +1300 (NZDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alliedtelesis.co.nz; s=mail181024; t=1603146868; bh=EU38qN+YqCsUiqj2K33O5O6r/SOBEf0Cm79FoZmV1bQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=iPMcb/W4PyML6CeTLEIXXD+WOUTkqkPUPSHIxLiDQBZqg8A71FXHzQCWXWgYu4mZw o6wG14VJfxku0J4eiEx52g87A5PPtpIFzXObfJskUWNSOwv9+gVg/zXN1DZDTvtL1J Vm9FZUqKdARqEDKmFguY2NqwcXTmVmM9CzFhLBQytGIb3KDI768sR0RTSdo7b8LWcD tR0AG5DzYVS0InfLhZYtXXGv92N4g4/EYsA7wzVsb3n6lo3+StwBF9tA1Q6Mqkn9GX 5yJnghTFW15c8ciQyDzJGG1GQlPf04p2x3n004ONuPQAQT63ihBCCoFAo189mt4WrG EqtGou383SyUg== Received: from smtp (Not Verified[10.32.16.33]) by mmarshal3.atlnz.lc with Trustwave SEG (v7,5,8,10121) id ; Tue, 20 Oct 2020 11:34:27 +1300 Received: from chrisp-dl.ws.atlnz.lc (chrisp-dl.ws.atlnz.lc [10.33.22.20]) by smtp (Postfix) with ESMTP id A016A13EEBB; Tue, 20 Oct 2020 11:34:27 +1300 (NZDT) Received: by chrisp-dl.ws.atlnz.lc (Postfix, from userid 1030) id D02DD283A9C; Tue, 20 Oct 2020 11:34:27 +1300 (NZDT) From: Chris Packham To: jdelvare@suse.com, linux@roeck-us.net, Tobi Wulff Cc: linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, Chris Packham Subject: [PATCH 1/2] hwmon: (adt7470) Create functions for updating readings and limits Date: Tue, 20 Oct 2020 11:34:22 +1300 Message-Id: <20201019223423.31488-2-chris.packham@alliedtelesis.co.nz> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201019223423.31488-1-chris.packham@alliedtelesis.co.nz> References: <20201019223423.31488-1-chris.packham@alliedtelesis.co.nz> MIME-Version: 1.0 x-atlnz-ls: pat Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org Split the body of adt7470_update_device() into two helper functions adt7470_update_sensors() and adt7470_update_limits(). Although neither of the new helpers returns an error yet lay the groundwork for propagating failures through to the sysfs readers. Signed-off-by: Chris Packham --- drivers/hwmon/adt7470.c | 154 ++++++++++++++++++++++++++++++---------- 1 file changed, 118 insertions(+), 36 deletions(-) diff --git a/drivers/hwmon/adt7470.c b/drivers/hwmon/adt7470.c index 740f39a54ab0..2e8feacccf84 100644 --- a/drivers/hwmon/adt7470.c +++ b/drivers/hwmon/adt7470.c @@ -270,37 +270,11 @@ static int adt7470_update_thread(void *p) return 0; } -static struct adt7470_data *adt7470_update_device(struct device *dev) +static int adt7470_update_sensors(struct adt7470_data *data) { - struct adt7470_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; - unsigned long local_jiffies = jiffies; u8 cfg; int i; - int need_sensors = 1; - int need_limits = 1; - - /* - * Figure out if we need to update the shadow registers. - * Lockless means that we may occasionally report out of - * date data. - */ - if (time_before(local_jiffies, data->sensors_last_updated + - SENSOR_REFRESH_INTERVAL) && - data->sensors_valid) - need_sensors = 0; - - if (time_before(local_jiffies, data->limits_last_updated + - LIMIT_REFRESH_INTERVAL) && - data->limits_valid) - need_limits = 0; - - if (!need_sensors && !need_limits) - return data; - - mutex_lock(&data->lock); - if (!need_sensors) - goto no_sensor_update; if (!data->temperatures_probed) adt7470_read_temperatures(client, data); @@ -352,12 +326,13 @@ static struct adt7470_data *adt7470_update_device(struct device *dev) data->alarms_mask = adt7470_read_word_data(client, ADT7470_REG_ALARM1_MASK); - data->sensors_last_updated = local_jiffies; - data->sensors_valid = 1; + return 0; +} -no_sensor_update: - if (!need_limits) - goto out; +static int adt7470_update_limits(struct adt7470_data *data) +{ + struct i2c_client *client = data->client; + int i; for (i = 0; i < ADT7470_TEMP_COUNT; i++) { data->temp_min[i] = i2c_smbus_read_byte_data(client, @@ -382,12 +357,55 @@ static struct adt7470_data *adt7470_update_device(struct device *dev) ADT7470_REG_PWM_TMIN(i)); } - data->limits_last_updated = local_jiffies; - data->limits_valid = 1; + return 0; +} +static struct adt7470_data *adt7470_update_device(struct device *dev) +{ + struct adt7470_data *data = dev_get_drvdata(dev); + unsigned long local_jiffies = jiffies; + int need_sensors = 1; + int need_limits = 1; + int err; + + /* + * Figure out if we need to update the shadow registers. + * Lockless means that we may occasionally report out of + * date data. + */ + if (time_before(local_jiffies, data->sensors_last_updated + + SENSOR_REFRESH_INTERVAL) && + data->sensors_valid) + need_sensors = 0; + + if (time_before(local_jiffies, data->limits_last_updated + + LIMIT_REFRESH_INTERVAL) && + data->limits_valid) + need_limits = 0; + + if (!need_sensors && !need_limits) + return data; + + mutex_lock(&data->lock); + if (need_sensors) { + err = adt7470_update_sensors(data); + if (err < 0) + goto out; + data->sensors_last_updated = local_jiffies; + data->sensors_valid = 1; + } + + if (need_limits) { + err = adt7470_update_limits(data); + if (err < 0) + goto out; + data->limits_last_updated = local_jiffies; + data->limits_valid = 1; + } out: mutex_unlock(&data->lock); - return data; + + return err < 0 ? ERR_PTR(err) : data; } static ssize_t auto_update_interval_show(struct device *dev, @@ -395,6 +413,10 @@ static ssize_t auto_update_interval_show(struct device *dev, char *buf) { struct adt7470_data *data = adt7470_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + return sprintf(buf, "%d\n", data->auto_update_interval); } @@ -422,6 +444,10 @@ static ssize_t num_temp_sensors_show(struct device *dev, char *buf) { struct adt7470_data *data = adt7470_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + return sprintf(buf, "%d\n", data->num_temp_sensors); } @@ -451,6 +477,10 @@ static ssize_t temp_min_show(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]); } @@ -483,6 +513,10 @@ static ssize_t temp_max_show(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]); } @@ -515,6 +549,10 @@ static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]); } @@ -524,6 +562,9 @@ static ssize_t alarm_mask_show(struct device *dev, { struct adt7470_data *data = adt7470_update_device(dev); + if (IS_ERR(data)) + return PTR_ERR(data); + return sprintf(buf, "%x\n", data->alarms_mask); } @@ -554,6 +595,9 @@ static ssize_t fan_max_show(struct device *dev, struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); + if (IS_ERR(data)) + return PTR_ERR(data); + if (FAN_DATA_VALID(data->fan_max[attr->index])) return sprintf(buf, "%d\n", FAN_PERIOD_TO_RPM(data->fan_max[attr->index])); @@ -590,6 +634,9 @@ static ssize_t fan_min_show(struct device *dev, struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); + if (IS_ERR(data)) + return PTR_ERR(data); + if (FAN_DATA_VALID(data->fan_min[attr->index])) return sprintf(buf, "%d\n", FAN_PERIOD_TO_RPM(data->fan_min[attr->index])); @@ -626,6 +673,9 @@ static ssize_t fan_show(struct device *dev, struct device_attribute *devattr, struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); + if (IS_ERR(data)) + return PTR_ERR(data); + if (FAN_DATA_VALID(data->fan[attr->index])) return sprintf(buf, "%d\n", FAN_PERIOD_TO_RPM(data->fan[attr->index])); @@ -637,6 +687,10 @@ static ssize_t force_pwm_max_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct adt7470_data *data = adt7470_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + return sprintf(buf, "%d\n", data->force_pwm_max); } @@ -670,6 +724,10 @@ static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + return sprintf(buf, "%d\n", data->pwm[attr->index]); } @@ -763,6 +821,10 @@ static ssize_t pwm_max_show(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + return sprintf(buf, "%d\n", data->pwm_max[attr->index]); } @@ -794,6 +856,10 @@ static ssize_t pwm_min_show(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + return sprintf(buf, "%d\n", data->pwm_min[attr->index]); } @@ -825,6 +891,10 @@ static ssize_t pwm_tmax_show(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + /* the datasheet says that tmax = tmin + 20C */ return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index])); } @@ -834,6 +904,10 @@ static ssize_t pwm_tmin_show(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]); } @@ -866,6 +940,10 @@ static ssize_t pwm_auto_show(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]); } @@ -911,8 +989,12 @@ static ssize_t pwm_auto_temp_show(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); - u8 ctrl = data->pwm_auto_temp[attr->index]; + u8 ctrl; + + if (IS_ERR(data)) + return PTR_ERR(data); + ctrl = data->pwm_auto_temp[attr->index]; if (ctrl) return sprintf(buf, "%d\n", 1 << (ctrl - 1)); else From patchwork Mon Oct 19 22:34:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Packham X-Patchwork-Id: 11845369 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B0D8717CA for ; Mon, 19 Oct 2020 22:34:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6D31E22400 for ; Mon, 19 Oct 2020 22:34:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=alliedtelesis.co.nz header.i=@alliedtelesis.co.nz header.b="r/ZsQSzJ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388330AbgJSWem (ORCPT ); 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Tue, 20 Oct 2020 11:34:27 +1300 Received: from chrisp-dl.ws.atlnz.lc (chrisp-dl.ws.atlnz.lc [10.33.22.20]) by smtp (Postfix) with ESMTP id D0DB413EEBB; Tue, 20 Oct 2020 11:34:27 +1300 (NZDT) Received: by chrisp-dl.ws.atlnz.lc (Postfix, from userid 1030) id 0CC5B283A9C; Tue, 20 Oct 2020 11:34:28 +1300 (NZDT) From: Chris Packham To: jdelvare@suse.com, linux@roeck-us.net, Tobi Wulff Cc: linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, Chris Packham Subject: [PATCH 2/2] hwmon: (adt7470) Convert to regmap Date: Tue, 20 Oct 2020 11:34:23 +1300 Message-Id: <20201019223423.31488-3-chris.packham@alliedtelesis.co.nz> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201019223423.31488-1-chris.packham@alliedtelesis.co.nz> References: <20201019223423.31488-1-chris.packham@alliedtelesis.co.nz> MIME-Version: 1.0 x-atlnz-ls: pat Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org Convert the adt7470 to using regmap and add error handling. Signed-off-by: Chris Packham --- drivers/hwmon/adt7470.c | 388 ++++++++++++++++++++++++++-------------- 1 file changed, 250 insertions(+), 138 deletions(-) diff --git a/drivers/hwmon/adt7470.c b/drivers/hwmon/adt7470.c index 2e8feacccf84..d20aeb3a2fdc 100644 --- a/drivers/hwmon/adt7470.c +++ b/drivers/hwmon/adt7470.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include @@ -137,7 +138,7 @@ static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END }; #define ADT7470_FREQ_SHIFT 4 struct adt7470_data { - struct i2c_client *client; + struct regmap *regmap; struct mutex lock; char sensors_valid; char limits_valid; @@ -171,51 +172,73 @@ struct adt7470_data { * 16-bit registers on the ADT7470 are low-byte first. The data sheet says * that the low byte must be read before the high byte. */ -static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg) +static inline int adt7470_read_word_data(struct adt7470_data *data, u8 reg) { - u16 foo; - foo = i2c_smbus_read_byte_data(client, reg); - foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8); - return foo; + u8 val[2]; + int err; + + err = regmap_bulk_read(data->regmap, reg, &val, 2); + if (err < 0) + return err; + + return val[0] | (val[1] << 8); } -static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg, +static inline int adt7470_write_word_data(struct adt7470_data *data, u8 reg, u16 value) { - return i2c_smbus_write_byte_data(client, reg, value & 0xFF) - || i2c_smbus_write_byte_data(client, reg + 1, value >> 8); + u8 val[2]; + + val[0] = value & 0xFF; + val[1] = value >> 8; + + return regmap_bulk_write(data->regmap, reg, &val, 2); } /* Probe for temperature sensors. Assumes lock is held */ -static int adt7470_read_temperatures(struct i2c_client *client, - struct adt7470_data *data) +static int adt7470_read_temperatures(struct adt7470_data *data) { unsigned long res; + int err; int i; u8 cfg, pwm[4], pwm_cfg[2]; /* save pwm[1-4] config register */ - pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0)); - pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2)); + err = regmap_raw_read(data->regmap, ADT7470_REG_PWM_CFG(0), &pwm_cfg[0], 1); + if (err < 0) + return err; + err = regmap_raw_read(data->regmap, ADT7470_REG_PWM_CFG(2), &pwm_cfg[1], 1); + if (err < 0) + return err; /* set manual pwm to whatever it is set to now */ - for (i = 0; i < ADT7470_FAN_COUNT; i++) - pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i)); + err = regmap_bulk_read(data->regmap, ADT7470_REG_PWM(0), &pwm[0], ADT7470_FAN_COUNT); + if (err < 0) + return err; /* put pwm in manual mode */ - i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), - pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK)); - i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), - pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK)); + pwm_cfg[0] &= ~ADT7470_PWM_AUTO_MASK; + err = regmap_raw_write(data->regmap, ADT7470_REG_PWM_CFG(0), &pwm_cfg[0], 1); + if (err < 0) + return err; + pwm_cfg[1] &= ~ADT7470_PWM_AUTO_MASK; + err = regmap_raw_write(data->regmap, ADT7470_REG_PWM_CFG(2), &pwm_cfg[1], 1); + if (err < 0) + return err; /* write pwm control to whatever it was */ - for (i = 0; i < ADT7470_FAN_COUNT; i++) - i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]); + err = regmap_bulk_write(data->regmap, ADT7470_REG_PWM(0), &pwm[0], ADT7470_FAN_COUNT); + if (err < 0) + return err; /* start reading temperature sensors */ - cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); + err = regmap_raw_read(data->regmap, ADT7470_REG_CFG, &cfg, 1); + if (err < 0) + return err; cfg |= 0x80; - i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg); + err = regmap_raw_write(data->regmap, ADT7470_REG_CFG, &cfg, 1); + if (err < 0) + return err; /* Delay is 200ms * number of temp sensors. */ res = msleep_interruptible((data->num_temp_sensors >= 0 ? @@ -223,13 +246,21 @@ static int adt7470_read_temperatures(struct i2c_client *client, TEMP_COLLECTION_TIME)); /* done reading temperature sensors */ - cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); + err = regmap_raw_read(data->regmap, ADT7470_REG_CFG, &cfg, 1); + if (err < 0) + return err; cfg &= ~0x80; - i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg); + err = regmap_raw_write(data->regmap, ADT7470_REG_CFG, &cfg, 1); + if (err < 0) + return err; /* restore pwm[1-4] config registers */ - i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]); - i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]); + err = regmap_raw_write(data->regmap, ADT7470_REG_PWM_CFG(0), &pwm_cfg[0], 1); + if (err < 0) + return err; + err = regmap_raw_write(data->regmap, ADT7470_REG_PWM_CFG(2), &pwm_cfg[1], 1); + if (err < 0) + return err; if (res) { pr_err("ha ha, interrupted\n"); @@ -240,13 +271,16 @@ static int adt7470_read_temperatures(struct i2c_client *client, if (data->num_temp_sensors >= 0) return 0; + err = regmap_bulk_read(data->regmap, ADT7470_TEMP_REG(0), &data->temp[0], + ADT7470_TEMP_COUNT); + if (err < 0) + return err; for (i = 0; i < ADT7470_TEMP_COUNT; i++) { - data->temp[i] = i2c_smbus_read_byte_data(client, - ADT7470_TEMP_REG(i)); if (data->temp[i]) data->num_temp_sensors = i + 1; } data->temperatures_probed = 1; + return 0; } @@ -254,10 +288,11 @@ static int adt7470_update_thread(void *p) { struct i2c_client *client = p; struct adt7470_data *data = i2c_get_clientdata(client); + int err = 0; while (!kthread_should_stop()) { mutex_lock(&data->lock); - adt7470_read_temperatures(client, data); + err = adt7470_read_temperatures(data); mutex_unlock(&data->lock); set_current_state(TASK_INTERRUPTIBLE); @@ -267,94 +302,124 @@ static int adt7470_update_thread(void *p) schedule_timeout(msecs_to_jiffies(data->auto_update_interval)); } - return 0; + return err; } static int adt7470_update_sensors(struct adt7470_data *data) { - struct i2c_client *client = data->client; + int alarms_mask; + u8 vals[2]; u8 cfg; + int err; int i; if (!data->temperatures_probed) - adt7470_read_temperatures(client, data); + err = adt7470_read_temperatures(data); else - for (i = 0; i < ADT7470_TEMP_COUNT; i++) - data->temp[i] = i2c_smbus_read_byte_data(client, - ADT7470_TEMP_REG(i)); + err = regmap_bulk_read(data->regmap, ADT7470_TEMP_REG(0), &data->temp[0], + ADT7470_TEMP_COUNT); + if (err < 0) + return err; - for (i = 0; i < ADT7470_FAN_COUNT; i++) - data->fan[i] = adt7470_read_word_data(client, - ADT7470_REG_FAN(i)); + for (i = 0; i < ADT7470_FAN_COUNT; i++) { + int val = adt7470_read_word_data(data, ADT7470_REG_FAN(i)); - for (i = 0; i < ADT7470_PWM_COUNT; i++) { - int reg; - int reg_mask; + if (val < 0) + return val; + + data->fan[i] = val; + } - data->pwm[i] = i2c_smbus_read_byte_data(client, - ADT7470_REG_PWM(i)); + err = regmap_bulk_read(data->regmap, ADT7470_REG_PWM(0), &data->pwm[0], ADT7470_PWM_COUNT); + if (err < 0) + return err; + + for (i = 0; i < ADT7470_PWM_COUNT; i++) { + u8 mask; + u8 val; if (i % 2) - reg_mask = ADT7470_PWM2_AUTO_MASK; + mask = ADT7470_PWM2_AUTO_MASK; else - reg_mask = ADT7470_PWM1_AUTO_MASK; + mask = ADT7470_PWM1_AUTO_MASK; - reg = ADT7470_REG_PWM_CFG(i); - if (i2c_smbus_read_byte_data(client, reg) & reg_mask) + err = regmap_raw_read(data->regmap, ADT7470_REG_PWM_CFG(i), &val, 1); + if (err < 0) + return err; + if (val & mask) data->pwm_automatic[i] = 1; else data->pwm_automatic[i] = 0; - reg = ADT7470_REG_PWM_AUTO_TEMP(i); - cfg = i2c_smbus_read_byte_data(client, reg); + err = regmap_raw_read(data->regmap, ADT7470_REG_PWM_AUTO_TEMP(i), &val, 1); + if (err < 0) + return err; if (!(i % 2)) - data->pwm_auto_temp[i] = cfg >> 4; + data->pwm_auto_temp[i] = val >> 4; else - data->pwm_auto_temp[i] = cfg & 0xF; + data->pwm_auto_temp[i] = val & 0xF; } - if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) & - ADT7470_FSPD_MASK) + err = regmap_raw_read(data->regmap, ADT7470_REG_CFG, &cfg, 1); + if (err < 0) + return err; + if (cfg & ADT7470_FSPD_MASK) data->force_pwm_max = 1; else data->force_pwm_max = 0; - data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1); + err = regmap_bulk_read(data->regmap, ADT7470_REG_ALARM1, &vals[0], 2); + if (err < 0) + return err; + data->alarm = vals[0]; if (data->alarm & ADT7470_OOL_ALARM) - data->alarm |= ALARM2(i2c_smbus_read_byte_data(client, - ADT7470_REG_ALARM2)); - data->alarms_mask = adt7470_read_word_data(client, - ADT7470_REG_ALARM1_MASK); + data->alarm |= ALARM2(vals[1]); + + alarms_mask = adt7470_read_word_data(data, ADT7470_REG_ALARM1_MASK); + if (alarms_mask < 0) + return alarms_mask; + data->alarms_mask = alarms_mask; return 0; } static int adt7470_update_limits(struct adt7470_data *data) { - struct i2c_client *client = data->client; + int err; int i; for (i = 0; i < ADT7470_TEMP_COUNT; i++) { - data->temp_min[i] = i2c_smbus_read_byte_data(client, - ADT7470_TEMP_MIN_REG(i)); - data->temp_max[i] = i2c_smbus_read_byte_data(client, - ADT7470_TEMP_MAX_REG(i)); + err = regmap_raw_read(data->regmap, ADT7470_TEMP_MIN_REG(i), &data->temp_min[i], 1); + if (err < 0) + return err; + err = regmap_raw_read(data->regmap, ADT7470_TEMP_MAX_REG(i), &data->temp_max[i], 1); + if (err < 0) + return err; } for (i = 0; i < ADT7470_FAN_COUNT; i++) { - data->fan_min[i] = adt7470_read_word_data(client, - ADT7470_REG_FAN_MIN(i)); - data->fan_max[i] = adt7470_read_word_data(client, - ADT7470_REG_FAN_MAX(i)); + int val; + + val = adt7470_read_word_data(data, ADT7470_REG_FAN_MIN(i)); + if (val < 0) + return val; + data->fan_min[i] = val; + val = adt7470_read_word_data(data, ADT7470_REG_FAN_MAX(i)); + if (val < 0) + return val; + data->fan_max[i] = val; } for (i = 0; i < ADT7470_PWM_COUNT; i++) { - data->pwm_max[i] = i2c_smbus_read_byte_data(client, - ADT7470_REG_PWM_MAX(i)); - data->pwm_min[i] = i2c_smbus_read_byte_data(client, - ADT7470_REG_PWM_MIN(i)); - data->pwm_tmin[i] = i2c_smbus_read_byte_data(client, - ADT7470_REG_PWM_TMIN(i)); + err = regmap_raw_read(data->regmap, ADT7470_REG_PWM_MAX(i), &data->pwm_max[i], 1); + if (err < 0) + return err; + err = regmap_raw_read(data->regmap, ADT7470_REG_PWM_MIN(i), &data->pwm_min[i], 1); + if (err < 0) + return err; + err = regmap_raw_read(data->regmap, ADT7470_REG_PWM_TMIN(i), &data->pwm_tmin[i], 1); + if (err < 0) + return err; } return 0; @@ -490,8 +555,8 @@ static ssize_t temp_min_store(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; long temp; + int err; if (kstrtol(buf, 10, &temp)) return -EINVAL; @@ -501,11 +566,11 @@ static ssize_t temp_min_store(struct device *dev, mutex_lock(&data->lock); data->temp_min[attr->index] = temp; - i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index), - temp); + err = regmap_raw_write(data->regmap, ADT7470_TEMP_MIN_REG(attr->index), + &data->temp_min[attr->index], 1); mutex_unlock(&data->lock); - return count; + return err < 0 ? err : count; } static ssize_t temp_max_show(struct device *dev, @@ -526,8 +591,8 @@ static ssize_t temp_max_store(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; long temp; + int err; if (kstrtol(buf, 10, &temp)) return -EINVAL; @@ -537,11 +602,11 @@ static ssize_t temp_max_store(struct device *dev, mutex_lock(&data->lock); data->temp_max[attr->index] = temp; - i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index), - temp); + err = regmap_raw_write(data->regmap, ADT7470_TEMP_MAX_REG(attr->index), + &data->temp_max[attr->index], 1); mutex_unlock(&data->lock); - return count; + return err < 0 ? err : count; } static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, @@ -574,6 +639,7 @@ static ssize_t alarm_mask_store(struct device *dev, { struct adt7470_data *data = dev_get_drvdata(dev); long mask; + int err; if (kstrtoul(buf, 0, &mask)) return -EINVAL; @@ -583,10 +649,10 @@ static ssize_t alarm_mask_store(struct device *dev, mutex_lock(&data->lock); data->alarms_mask = mask; - adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask); + err = adt7470_write_word_data(data, ADT7470_REG_ALARM1_MASK, mask); mutex_unlock(&data->lock); - return count; + return err < 0 ? err : count; } static ssize_t fan_max_show(struct device *dev, @@ -611,7 +677,6 @@ static ssize_t fan_max_store(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; long temp; if (kstrtol(buf, 10, &temp) || !temp) @@ -622,7 +687,7 @@ static ssize_t fan_max_store(struct device *dev, mutex_lock(&data->lock); data->fan_max[attr->index] = temp; - adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp); + adt7470_write_word_data(data, ADT7470_REG_FAN_MAX(attr->index), temp); mutex_unlock(&data->lock); return count; @@ -650,7 +715,6 @@ static ssize_t fan_min_store(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; long temp; if (kstrtol(buf, 10, &temp) || !temp) @@ -661,7 +725,7 @@ static ssize_t fan_min_store(struct device *dev, mutex_lock(&data->lock); data->fan_min[attr->index] = temp; - adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp); + adt7470_write_word_data(data, ADT7470_REG_FAN_MIN(attr->index), temp); mutex_unlock(&data->lock); return count; @@ -699,8 +763,8 @@ static ssize_t force_pwm_max_store(struct device *dev, const char *buf, size_t count) { struct adt7470_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; long temp; + int err; u8 reg; if (kstrtol(buf, 10, &temp)) @@ -708,15 +772,18 @@ static ssize_t force_pwm_max_store(struct device *dev, mutex_lock(&data->lock); data->force_pwm_max = temp; - reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); + err = regmap_raw_read(data->regmap, ADT7470_REG_CFG, ®, 1); + if (err < 0) + goto out; if (temp) reg |= ADT7470_FSPD_MASK; else reg &= ~ADT7470_FSPD_MASK; - i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg); + err = regmap_raw_write(data->regmap, ADT7470_REG_CFG, ®, 1); +out: mutex_unlock(&data->lock); - return count; + return err < 0 ? err : count; } static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr, @@ -736,8 +803,8 @@ static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; long temp; + int err; if (kstrtol(buf, 10, &temp)) return -EINVAL; @@ -746,10 +813,11 @@ static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr, mutex_lock(&data->lock); data->pwm[attr->index] = temp; - i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp); + err = regmap_raw_write(data->regmap, ADT7470_REG_PWM(attr->index), + &data->pwm[attr->index], 1); mutex_unlock(&data->lock); - return count; + return err < 0 ? err : count; } /* These are the valid PWM frequencies to the nearest Hz */ @@ -761,13 +829,21 @@ static ssize_t pwm1_freq_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct adt7470_data *data = adt7470_update_device(dev); - unsigned char cfg_reg_1; - unsigned char cfg_reg_2; + u8 cfg_reg_1; + u8 cfg_reg_2; int index; + int err; + + if (IS_ERR(data)) + return PTR_ERR(data); mutex_lock(&data->lock); - cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG); - cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2); + err = regmap_raw_read(data->regmap, ADT7470_REG_CFG, &cfg_reg_1, 1); + if (err < 0) + goto out; + err = regmap_raw_read(data->regmap, ADT7470_REG_CFG_2, &cfg_reg_2, 1); + if (err < 0) + goto out; mutex_unlock(&data->lock); index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT; @@ -777,6 +853,10 @@ static ssize_t pwm1_freq_show(struct device *dev, index = ARRAY_SIZE(adt7470_freq_map) - 1; return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]); + +out: + mutex_unlock(&data->lock); + return err; } static ssize_t pwm1_freq_store(struct device *dev, @@ -784,11 +864,11 @@ static ssize_t pwm1_freq_store(struct device *dev, const char *buf, size_t count) { struct adt7470_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; long freq; int index; int low_freq = ADT7470_CFG_LF; - unsigned char val; + int err; + u8 val; if (kstrtol(buf, 10, &freq)) return -EINVAL; @@ -804,16 +884,26 @@ static ssize_t pwm1_freq_store(struct device *dev, mutex_lock(&data->lock); /* Configuration Register 1 */ - val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); - i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, - (val & ~ADT7470_CFG_LF) | low_freq); + err = regmap_raw_read(data->regmap, ADT7470_REG_CFG, &val, 1); + if (err < 0) + goto out; + val &= ~ADT7470_CFG_LF; + val |= low_freq; + err = regmap_raw_write(data->regmap, ADT7470_REG_CFG, &val, 1); + if (err < 0) + goto out; + /* Configuration Register 2 */ - val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2); - i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2, - (val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT)); + err = regmap_raw_read(data->regmap, ADT7470_REG_CFG_2, &val, 1); + if (err < 0) + goto out; + val &= ~ADT7470_FREQ_MASK; + val |= index << ADT7470_FREQ_SHIFT; + err = regmap_raw_write(data->regmap, ADT7470_REG_CFG_2, &val, 1); +out: mutex_unlock(&data->lock); - return count; + return err < 0 ? err : count; } static ssize_t pwm_max_show(struct device *dev, @@ -834,8 +924,8 @@ static ssize_t pwm_max_store(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; long temp; + int err; if (kstrtol(buf, 10, &temp)) return -EINVAL; @@ -844,11 +934,11 @@ static ssize_t pwm_max_store(struct device *dev, mutex_lock(&data->lock); data->pwm_max[attr->index] = temp; - i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index), - temp); + err = regmap_raw_write(data->regmap, ADT7470_REG_PWM_MAX(attr->index), + &data->pwm_max[attr->index], 1); mutex_unlock(&data->lock); - return count; + return err < 0 ? err : count; } static ssize_t pwm_min_show(struct device *dev, @@ -869,8 +959,8 @@ static ssize_t pwm_min_store(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; long temp; + int err; if (kstrtol(buf, 10, &temp)) return -EINVAL; @@ -878,12 +968,11 @@ static ssize_t pwm_min_store(struct device *dev, temp = clamp_val(temp, 0, 255); mutex_lock(&data->lock); - data->pwm_min[attr->index] = temp; - i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index), - temp); + err = regmap_raw_write(data->regmap, ADT7470_REG_PWM_MIN(attr->index), + &data->pwm_min[attr->index], 1); mutex_unlock(&data->lock); - return count; + return err < 0 ? err : count; } static ssize_t pwm_tmax_show(struct device *dev, @@ -917,8 +1006,8 @@ static ssize_t pwm_tmin_store(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; long temp; + int err; if (kstrtol(buf, 10, &temp)) return -EINVAL; @@ -928,11 +1017,11 @@ static ssize_t pwm_tmin_store(struct device *dev, mutex_lock(&data->lock); data->pwm_tmin[attr->index] = temp; - i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index), - temp); + err = regmap_raw_write(data->regmap, ADT7470_REG_PWM_TMIN(attr->index), + &data->pwm_tmin[attr->index], 1); mutex_unlock(&data->lock); - return count; + return err < 0 ? err : count; } static ssize_t pwm_auto_show(struct device *dev, @@ -953,10 +1042,10 @@ static ssize_t pwm_auto_store(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index); int pwm_auto_reg_mask; long temp; + int err; u8 reg; if (kstrtol(buf, 10, &temp)) @@ -973,15 +1062,18 @@ static ssize_t pwm_auto_store(struct device *dev, mutex_lock(&data->lock); data->pwm_automatic[attr->index] = temp; - reg = i2c_smbus_read_byte_data(client, pwm_auto_reg); + err = regmap_raw_read(data->regmap, pwm_auto_reg, ®, 1); + if (err < 0) + goto out; if (temp) reg |= pwm_auto_reg_mask; else reg &= ~pwm_auto_reg_mask; - i2c_smbus_write_byte_data(client, pwm_auto_reg, reg); + err = regmap_raw_write(data->regmap, pwm_auto_reg, ®, 1); +out: mutex_unlock(&data->lock); - return count; + return err < 0 ? err : count; } static ssize_t pwm_auto_temp_show(struct device *dev, @@ -1016,9 +1108,9 @@ static ssize_t pwm_auto_temp_store(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index); long temp; + int err; u8 reg; if (kstrtol(buf, 10, &temp)) @@ -1030,7 +1122,10 @@ static ssize_t pwm_auto_temp_store(struct device *dev, mutex_lock(&data->lock); data->pwm_automatic[attr->index] = temp; - reg = i2c_smbus_read_byte_data(client, pwm_auto_reg); + + err = regmap_raw_read(data->regmap, pwm_auto_reg, ®, 1); + if (err < 0) + goto out; if (!(attr->index % 2)) { reg &= 0xF; @@ -1040,10 +1135,11 @@ static ssize_t pwm_auto_temp_store(struct device *dev, reg |= temp & 0xF; } - i2c_smbus_write_byte_data(client, pwm_auto_reg, reg); + err = regmap_raw_write(data->regmap, pwm_auto_reg, ®, 1); +out: mutex_unlock(&data->lock); - return count; + return err < 0 ? err : count; } static ssize_t alarm_show(struct device *dev, @@ -1287,23 +1383,35 @@ static int adt7470_detect(struct i2c_client *client, return 0; } -static void adt7470_init_client(struct i2c_client *client) +static int adt7470_init_client(struct device *dev, struct adt7470_data *data) { - int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); + int err; + u8 val; - if (reg < 0) { - dev_err(&client->dev, "cannot read configuration register\n"); - } else { - /* start monitoring (and do a self-test) */ - i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3); + err = regmap_raw_read(data->regmap, ADT7470_REG_CFG, &val, 1); + if (err < 0) { + dev_err(dev, "cannot read configuration register\n"); + return err; } + + val |= 3; + + return regmap_raw_write(data->regmap, ADT7470_REG_CFG, &val, 1); } +static const struct regmap_config adt7470_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .use_single_read = true, + .use_single_write = true, +}; + static int adt7470_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct adt7470_data *data; struct device *hwmon_dev; + int err; data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL); if (!data) @@ -1311,15 +1419,19 @@ static int adt7470_probe(struct i2c_client *client) data->num_temp_sensors = -1; data->auto_update_interval = AUTO_UPDATE_INTERVAL; + data->regmap = devm_regmap_init_i2c(client, &adt7470_regmap_config); + if (IS_ERR(data->regmap)) + return PTR_ERR(data->regmap); i2c_set_clientdata(client, data); - data->client = client; mutex_init(&data->lock); dev_info(&client->dev, "%s chip found\n", client->name); /* Initialize the ADT7470 chip */ - adt7470_init_client(client); + err = adt7470_init_client(dev, data); + if (err < 0) + return err; /* Register sysfs hooks */ hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,