From patchwork Thu Sep 5 01:45:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Robertson X-Patchwork-Id: 11132011 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 108A81398 for ; Thu, 5 Sep 2019 02:00:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E6F852168B for ; Thu, 5 Sep 2019 02:00:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730718AbfIECAs convert rfc822-to-8bit (ORCPT ); Wed, 4 Sep 2019 22:00:48 -0400 Received: from sender4-op-o15.zoho.com ([136.143.188.15]:17518 "EHLO sender4-op-o15.zoho.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730717AbfIECAs (ORCPT ); Wed, 4 Sep 2019 22:00:48 -0400 ARC-Seal: i=1; a=rsa-sha256; t=1567648810; cv=none; d=zoho.com; s=zohoarc; b=WJk2gc0qkfD++qOvy+F9zqyP1h4M+3uS2uqTaHszs/3yyAQx/uNFMcm0LzL6SU0ZkKM+mbCLAcwKXj31tiYBUUuLXnODvwrVrftBsbAmUf8cLVVqXyTw/o71H/dKMHMgUlkR6fgnNsZVmt2AebuBjZ6SMPJSwU76aikNB4Y9y/s= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1567648810; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To:ARC-Authentication-Results; bh=6pu0j+YrbrYbFWRtzHMKnhZVyQg7Zg4Wl0Xngc7B06E=; b=QrbaK+BLXV2jiD+mMrAP/PZUPBusxEeDf4H3PPMGI0oN270H5iJYBAyYouz73fcAF8QgWihzps3S53KZ5glMEPChRZ2dyljf1ux/lN4j8Di/VOWOAlywpMhqabBHgV9NBZS+zNDLAeSXaJRUOJFpKO8Anibh4v0icld1jVoolGQ= ARC-Authentication-Results: i=1; mx.zoho.com; dkim=pass header.i=dlrobertson.com; spf=pass smtp.mailfrom=dan@dlrobertson.com; dmarc=pass header.from= header.from= Received: from nessie.verizon.net (pool-100-15-144-194.washdc.fios.verizon.net [100.15.144.194]) by mx.zohomail.com with SMTPS id 1567648807744991.2886932031469; Wed, 4 Sep 2019 19:00:07 -0700 (PDT) From: Dan Robertson To: linux-hwmon@vger.kernel.org Cc: Jean Delvare , Guenter Roeck , Dan Robertson Message-ID: <20190905014554.21658-2-dan@dlrobertson.com> Subject: [PATCH 1/2] hwmon: (shtc1) add support for the SHTC3 sensor Date: Thu, 5 Sep 2019 01:45:53 +0000 X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190905014554.21658-1-dan@dlrobertson.com> References: <20190905010130.15019-2-dan@dlrobertson.com> <20190905014554.21658-1-dan@dlrobertson.com> MIME-Version: 1.0 X-ZohoMailClient: External Sender: linux-hwmon-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org Add support for the Sensirion SHTC3 humidity and temperature sensor to the shtc1 module. Signed-off-by: Dan Robertson --- Documentation/hwmon/shtc1.rst | 19 ++++++++---- drivers/hwmon/Kconfig | 4 +-- drivers/hwmon/shtc1.c | 56 ++++++++++++++++++++++++++--------- 3 files changed, 58 insertions(+), 21 deletions(-) diff --git a/Documentation/hwmon/shtc1.rst b/Documentation/hwmon/shtc1.rst index aa116332ba26..9b0f1eee5bf2 100644 --- a/Documentation/hwmon/shtc1.rst +++ b/Documentation/hwmon/shtc1.rst @@ -19,7 +19,17 @@ Supported chips: Addresses scanned: none - Datasheet: Not publicly available + Datasheet: http://www.sensirion.com/file/datasheet_shtw1 + + + + * Sensirion SHTC3 + + Prefix: 'shtc3' + + Addresses scanned: none + + Datasheet: http://www.sensirion.com/file/datasheet_shtc3 @@ -30,10 +40,9 @@ Author: Description ----------- -This driver implements support for the Sensirion SHTC1 chip, a humidity and -temperature sensor. Temperature is measured in degrees celsius, relative -humidity is expressed as a percentage. Driver can be used as well for SHTW1 -chip, which has the same electrical interface. +This driver implements support for the Sensirion SHTC1, SHTW1, and SHTC3 +chips, a humidity and temperature sensor. Temperature is measured in degrees +celsius, relative humidity is expressed as a percentage. The device communicates with the I2C protocol. All sensors are set to I2C address 0x70. See Documentation/i2c/instantiating-devices for methods to diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 650dd71f9724..e8b9b172ed9d 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1382,8 +1382,8 @@ config SENSORS_SHTC1 tristate "Sensiron humidity and temperature sensors. SHTC1 and compat." depends on I2C help - If you say yes here you get support for the Sensiron SHTC1 and SHTW1 - humidity and temperature sensors. + If you say yes here you get support for the Sensiron SHTC1, SHTW1, + and SHTC3 humidity and temperature sensors. This driver can also be built as a module. If so, the module will be called shtc1. diff --git a/drivers/hwmon/shtc1.c b/drivers/hwmon/shtc1.c index 83fe08185ac7..3e9a859a2b58 100644 --- a/drivers/hwmon/shtc1.c +++ b/drivers/hwmon/shtc1.c @@ -24,19 +24,32 @@ static const unsigned char shtc1_cmd_measure_blocking_lpm[] = { 0x64, 0x58 }; static const unsigned char shtc1_cmd_measure_nonblocking_lpm[] = { 0x60, 0x9c }; /* command for reading the ID register */ -static const unsigned char shtc1_cmd_read_id_reg[] = { 0xef, 0xc8 }; +static const unsigned char shtc1_cmd_read_id_reg[] = { 0xef, 0xc8 }; -/* constants for reading the ID register */ -#define SHTC1_ID 0x07 -#define SHTC1_ID_REG_MASK 0x1f +/* constants for reading the ID register + * SHTC1: 0x0007 with mask 0x001f + * SHTW1: 0x0007 with mask 0x001f + * SHTC3: 0x0807 with mask 0x083f + */ +#define SHTC3_ID 0x0807 +#define SHTC3_ID_MASK 0x083f +#define SHTC1_ID 0x0007 +#define SHTC1_ID_MASK 0x001f /* delays for non-blocking i2c commands, both in us */ #define SHTC1_NONBLOCKING_WAIT_TIME_HPM 14400 #define SHTC1_NONBLOCKING_WAIT_TIME_LPM 1000 +#define SHTC3_NONBLOCKING_WAIT_TIME_HPM 12100 +#define SHTC3_NONBLOCKING_WAIT_TIME_LPM 800 #define SHTC1_CMD_LENGTH 2 #define SHTC1_RESPONSE_LENGTH 6 +enum shtcx_chips { + shtc1, + shtc3, +}; + struct shtc1_data { struct i2c_client *client; struct mutex update_lock; @@ -47,6 +60,7 @@ struct shtc1_data { unsigned int nonblocking_wait_time; /* in us */ struct shtc1_platform_data setup; + enum shtcx_chips chip; int temperature; /* 1000 * temperature in dgr C */ int humidity; /* 1000 * relative humidity in %RH */ @@ -157,13 +171,16 @@ static void shtc1_select_command(struct shtc1_data *data) data->command = data->setup.blocking_io ? shtc1_cmd_measure_blocking_hpm : shtc1_cmd_measure_nonblocking_hpm; - data->nonblocking_wait_time = SHTC1_NONBLOCKING_WAIT_TIME_HPM; - + data->nonblocking_wait_time = (data->chip == shtc1) ? + SHTC1_NONBLOCKING_WAIT_TIME_HPM : + SHTC3_NONBLOCKING_WAIT_TIME_HPM; } else { data->command = data->setup.blocking_io ? shtc1_cmd_measure_blocking_lpm : shtc1_cmd_measure_nonblocking_lpm; - data->nonblocking_wait_time = SHTC1_NONBLOCKING_WAIT_TIME_LPM; + data->nonblocking_wait_time = (data->chip == shtc1) ? + SHTC1_NONBLOCKING_WAIT_TIME_LPM : + SHTC3_NONBLOCKING_WAIT_TIME_LPM; } } @@ -171,9 +188,11 @@ static int shtc1_probe(struct i2c_client *client, const struct i2c_device_id *id) { int ret; - char id_reg[2]; + u16 id_reg; + char id_reg_buf[2]; struct shtc1_data *data; struct device *hwmon_dev; + enum shtcx_chips chip = id->driver_data; struct i2c_adapter *adap = client->adapter; struct device *dev = &client->dev; @@ -187,13 +206,20 @@ static int shtc1_probe(struct i2c_client *client, dev_err(dev, "could not send read_id_reg command: %d\n", ret); return ret < 0 ? ret : -ENODEV; } - ret = i2c_master_recv(client, id_reg, sizeof(id_reg)); - if (ret != sizeof(id_reg)) { + ret = i2c_master_recv(client, id_reg_buf, sizeof(id_reg_buf)); + if (ret != sizeof(id_reg_buf)) { dev_err(dev, "could not read ID register: %d\n", ret); return -ENODEV; } - if ((id_reg[1] & SHTC1_ID_REG_MASK) != SHTC1_ID) { - dev_err(dev, "ID register doesn't match\n"); + + id_reg = be16_to_cpup((__be16 *)id_reg_buf); + if (chip == shtc3) { + if ((id_reg & SHTC3_ID_MASK) != SHTC3_ID) { + dev_err(dev, "SHTC3 ID register does not match\n"); + return -ENODEV; + } + } else if ((id_reg & SHTC1_ID_MASK) != SHTC1_ID) { + dev_err(dev, "SHTC1 ID register does not match\n"); return -ENODEV; } @@ -204,6 +230,7 @@ static int shtc1_probe(struct i2c_client *client, data->setup.blocking_io = false; data->setup.high_precision = true; data->client = client; + data->chip = chip; if (client->dev.platform_data) data->setup = *(struct shtc1_platform_data *)dev->platform_data; @@ -222,8 +249,9 @@ static int shtc1_probe(struct i2c_client *client, /* device ID table */ static const struct i2c_device_id shtc1_id[] = { - { "shtc1", 0 }, - { "shtw1", 0 }, + { "shtc1", shtc1 }, + { "shtw1", shtc1 }, + { "shtc3", shtc3 }, { } }; MODULE_DEVICE_TABLE(i2c, shtc1_id); From patchwork Thu Sep 5 01:45:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Robertson X-Patchwork-Id: 11132013 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 611F813B1 for ; Thu, 5 Sep 2019 02:01:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4A62520820 for ; Thu, 5 Sep 2019 02:01:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730722AbfIECBK convert rfc822-to-8bit (ORCPT ); Wed, 4 Sep 2019 22:01:10 -0400 Received: from sender4-op-o15.zoho.com ([136.143.188.15]:17525 "EHLO sender4-op-o15.zoho.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730717AbfIECBK (ORCPT ); Wed, 4 Sep 2019 22:01:10 -0400 ARC-Seal: i=1; a=rsa-sha256; t=1567648811; cv=none; d=zoho.com; s=zohoarc; b=e8iZH9eXtnQOSHg4En+gO5XvbTn2CLYkJlqEbs5Tcv3/NIALkfEN9WUMUDCH7WSX3JbWErzv+nXDBLvrpNZeZ38/YguxcE+FJiufLXcUK1EiyRtezTlOKBx+nEcrb1KjbYSDfvyNEM3F5EnMSg+f8+YBYE8EzTyAYT7xbRuxndY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1567648811; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To:ARC-Authentication-Results; bh=d/lz5o3C3UNj/VPSmkPyjD1WhY07pCH9s+H45T544PI=; b=jcg7FLs1i9qIy2pomhDszPA0tQnvqaAlK9Kl9e9lCA+/50R0cKk6/SG+oBa2kE0EyfKIC3xn0Mw1TRXzG/SdgW8sO9sP+vlWRJ4tyhEnCpNttA1I1rXmcnd+EX5Nj/cCJnTHzcRLJdT11QDDmAZxWZFfKsrxjZFztLfmfee+RB4= ARC-Authentication-Results: i=1; mx.zoho.com; dkim=pass header.i=dlrobertson.com; spf=pass smtp.mailfrom=dan@dlrobertson.com; dmarc=pass header.from= header.from= Received: from nessie.verizon.net (pool-100-15-144-194.washdc.fios.verizon.net [100.15.144.194]) by mx.zohomail.com with SMTPS id 1567648810980129.82563685747516; Wed, 4 Sep 2019 19:00:10 -0700 (PDT) From: Dan Robertson To: linux-hwmon@vger.kernel.org Cc: Jean Delvare , Guenter Roeck , Dan Robertson Message-ID: <20190905014554.21658-3-dan@dlrobertson.com> Subject: [PATCH 2/2] hwmon: (shtc1) fix shtc1 and shtw1 id mask Date: Thu, 5 Sep 2019 01:45:54 +0000 X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190905014554.21658-1-dan@dlrobertson.com> References: <20190905010130.15019-2-dan@dlrobertson.com> <20190905014554.21658-1-dan@dlrobertson.com> MIME-Version: 1.0 X-ZohoMailClient: External Sender: linux-hwmon-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org Fix an error in the bitmaskfor the shtc1 and shtw1 bitmask used to retrieve the chip ID from the ID register. See section 5.7 of the shtw1 or shtc1 datasheet for details. Fixes: 1a539d372edd9832444e7a3daa710c444c014dc9 ("hwmon: add support for Sensirion SHTC1 sensor") Signed-off-by: Dan Robertson --- drivers/hwmon/shtc1.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/hwmon/shtc1.c b/drivers/hwmon/shtc1.c index 3e9a859a2b58..c628313a20d4 100644 --- a/drivers/hwmon/shtc1.c +++ b/drivers/hwmon/shtc1.c @@ -27,14 +27,14 @@ static const unsigned char shtc1_cmd_measure_nonblocking_lpm[] = { 0x60, 0x9c }; static const unsigned char shtc1_cmd_read_id_reg[] = { 0xef, 0xc8 }; /* constants for reading the ID register - * SHTC1: 0x0007 with mask 0x001f - * SHTW1: 0x0007 with mask 0x001f + * SHTC1: 0x0007 with mask 0x003f + * SHTW1: 0x0007 with mask 0x003f * SHTC3: 0x0807 with mask 0x083f */ #define SHTC3_ID 0x0807 #define SHTC3_ID_MASK 0x083f #define SHTC1_ID 0x0007 -#define SHTC1_ID_MASK 0x001f +#define SHTC1_ID_MASK 0x003f /* delays for non-blocking i2c commands, both in us */ #define SHTC1_NONBLOCKING_WAIT_TIME_HPM 14400