From patchwork Wed May 6 01:08:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ivan Mikhaylov X-Patchwork-Id: 11530127 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 CB35A913 for ; Wed, 6 May 2020 01:07:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B0084207DD for ; Wed, 6 May 2020 01:07:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=yadro.com header.i=@yadro.com header.b="nYo/nDt5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729617AbgEFBHY (ORCPT ); Tue, 5 May 2020 21:07:24 -0400 Received: from mta-02.yadro.com ([89.207.88.252]:53810 "EHLO mta-01.yadro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729275AbgEFBHX (ORCPT ); Tue, 5 May 2020 21:07:23 -0400 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 45135427B1; Wed, 6 May 2020 01:07:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received; s=mta-01; t= 1588727238; x=1590541639; bh=Dv7w39ju2oOA7NOj7pE5cObQuyLCkCPWH30 nVs+H7PQ=; b=nYo/nDt5r3Q2qGsvuwi8ychy08Uk5TL4bognTSSdLapig5pHk/Q akyV9jg86XvwntppszcO83fIhzCMxgXU/9vZOC9zZUa6l1Gequbr/H0YV9qGeZoY LaJbrQxzac9GLZcX7R6uETMUUP7mzgw8pbnqVKs8s5kFa7edEO+Ak+Pg= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LoJs5lQM0-LH; Wed, 6 May 2020 04:07:18 +0300 (MSK) Received: from T-EXCH-02.corp.yadro.com (t-exch-02.corp.yadro.com [172.17.10.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id B7FE9499B3; Wed, 6 May 2020 04:07:17 +0300 (MSK) Received: from localhost.dev.yadro.com (10.199.2.222) by T-EXCH-02.corp.yadro.com (172.17.10.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Wed, 6 May 2020 04:07:18 +0300 From: Ivan Mikhaylov CC: Ivan Mikhaylov , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , , , , Mark Rutland , Rob Herring , Andy Shevchenko Subject: [PATCH v12 1/2] dt-bindings: proximity: provide vcnl3020 device tree binding document Date: Wed, 6 May 2020 04:08:08 +0300 Message-ID: <20200506010809.6348-2-i.mikhaylov@yadro.com> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200506010809.6348-1-i.mikhaylov@yadro.com> References: <20200506010809.6348-1-i.mikhaylov@yadro.com> MIME-Version: 1.0 X-Originating-IP: [10.199.2.222] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-02.corp.yadro.com (172.17.10.102) To: unlisted-recipients:; (no To-header on input) Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Mostly standard i2c driver with some additional led-current option for vcnl3020. Signed-off-by: Ivan Mikhaylov --- .../iio/proximity/vishay,vcnl3020.yaml | 65 +++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/proximity/vishay,vcnl3020.yaml diff --git a/Documentation/devicetree/bindings/iio/proximity/vishay,vcnl3020.yaml b/Documentation/devicetree/bindings/iio/proximity/vishay,vcnl3020.yaml new file mode 100644 index 000000000000..408dee17cdf5 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/proximity/vishay,vcnl3020.yaml @@ -0,0 +1,65 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/proximity/vcnl3020.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Integrated Proximity Sensor With Infrared Emitter + +maintainers: + - Ivan Mikhaylov + +description: | + The VCNL3020 is a fully integrated proximity sensor. Fully integrated means + that the infrared emitter is included in the package. It has 16-bit + resolution. It includes a signal processing IC and features standard I2C + communication interface. It features an interrupt function. + + Specifications about the devices can be found at: + https://www.vishay.com/docs/84150/vcnl3020.pdf + +properties: + compatible: + enum: + - vishay,vcnl3020 + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + vdd-supply: + description: Regulator that provides power to the sensor + + vddio-supply: + description: Regulator that provides power to the bus + + vishay,led-current-microamp: + description: + IR LED current value with valid Range = 0 to 20d. e.g. 0 = 0 mA, + 1 = 10 mA, 20 = 200 mA. LED Current is limited to 200 mA for values + higher than decimal 20. The drive current for the LED used in proximity + sensing. + enum: [0, 10000, 20000, 30000, 40000, 50000, 60000, 70000, 80000, 90000, + 100000, 110000, 120000, 130000, 140000, 150000, 160000, 170000, + 180000, 190000, 200000] + default: 20000 + +required: + - compatible + - reg + +examples: + - | + i2c { + + #address-cells = <1>; + #size-cells = <0>; + + proximity@13 { + compatible = "vishay,vcnl3020"; + reg = <0x13>; + vishay,led-current-microamp = <200000>; + }; + }; From patchwork Wed May 6 01:08:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ivan Mikhaylov X-Patchwork-Id: 11530129 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 E41A992A for ; Wed, 6 May 2020 01:07:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CCA6D20838 for ; Wed, 6 May 2020 01:07:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=yadro.com header.i=@yadro.com header.b="DSOy8ssx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729721AbgEFBH0 (ORCPT ); Tue, 5 May 2020 21:07:26 -0400 Received: from mta-02.yadro.com ([89.207.88.252]:53826 "EHLO mta-01.yadro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728609AbgEFBHZ (ORCPT ); Tue, 5 May 2020 21:07:25 -0400 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id AA9B9499B3; Wed, 6 May 2020 01:07:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received; s=mta-01; t= 1588727238; x=1590541639; bh=vRWoKECDvuRxHDhlREWmVHIm/SvPk8MDC7M zSPznVwU=; b=DSOy8ssxCR698Ypk/W35F7gsdCGMl5adqZCl7iPVd7V/Oj4X1W8 Jb+uQArXkuVaPDhcW/jBO5VOMJniaghJXO2A3l1JkjrTxJN7xBpYTxMYDJrTngUr fWingOmWVbVxZjz2h2LQp5Yb9kuF1dI3F707RnEawEnc+vNDAc1oSILI= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZFPLktRjj0_r; Wed, 6 May 2020 04:07:18 +0300 (MSK) Received: from T-EXCH-02.corp.yadro.com (t-exch-02.corp.yadro.com [172.17.10.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id B06DA4C83E; Wed, 6 May 2020 04:07:18 +0300 (MSK) Received: from localhost.dev.yadro.com (10.199.2.222) by T-EXCH-02.corp.yadro.com (172.17.10.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Wed, 6 May 2020 04:07:19 +0300 From: Ivan Mikhaylov CC: Ivan Mikhaylov , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , , , , Mark Rutland , Rob Herring , Andy Shevchenko Subject: [PATCH v12 2/2] iio: proximity: Add driver support for vcnl3020 proximity sensor Date: Wed, 6 May 2020 04:08:09 +0300 Message-ID: <20200506010809.6348-3-i.mikhaylov@yadro.com> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200506010809.6348-1-i.mikhaylov@yadro.com> References: <20200506010809.6348-1-i.mikhaylov@yadro.com> MIME-Version: 1.0 X-Originating-IP: [10.199.2.222] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-02.corp.yadro.com (172.17.10.102) To: unlisted-recipients:; (no To-header on input) Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Proximity sensor driver based on light/vcnl4000.c code. For now supports only the single on-demand measurement. The VCNL3020 is a fully integrated proximity sensor. Fully integrated means that the infrared emitter is included in the package. It has 16-bit resolution. It includes a signal processing IC and features standard I2C communication interface. It features an interrupt function. Datasheet: http://www.vishay.com/docs/84150/vcnl3020.pdf Signed-off-by: Ivan Mikhaylov Reviewed-by: Andy Shevchenko --- drivers/iio/proximity/Kconfig | 11 ++ drivers/iio/proximity/Makefile | 1 + drivers/iio/proximity/vcnl3020.c | 258 +++++++++++++++++++++++++++++++ 3 files changed, 270 insertions(+) create mode 100644 drivers/iio/proximity/vcnl3020.c diff --git a/drivers/iio/proximity/Kconfig b/drivers/iio/proximity/Kconfig index d53601447da4..b8d2b17e60ac 100644 --- a/drivers/iio/proximity/Kconfig +++ b/drivers/iio/proximity/Kconfig @@ -112,6 +112,17 @@ config SRF08 To compile this driver as a module, choose M here: the module will be called srf08. +config VCNL3020 + tristate "VCNL3020 proximity sensor" + select REGMAP_I2C + depends on I2C + help + Say Y here if you want to build a driver for the Vishay VCNL3020 + proximity sensor. + + To compile this driver as a module, choose M here: the + module will be called vcnl3020. + config VL53L0X_I2C tristate "STMicroelectronics VL53L0X ToF ranger sensor (I2C)" depends on I2C diff --git a/drivers/iio/proximity/Makefile b/drivers/iio/proximity/Makefile index 0bb5f9de13d6..8245978ced30 100644 --- a/drivers/iio/proximity/Makefile +++ b/drivers/iio/proximity/Makefile @@ -12,5 +12,6 @@ obj-$(CONFIG_RFD77402) += rfd77402.o obj-$(CONFIG_SRF04) += srf04.o obj-$(CONFIG_SRF08) += srf08.o obj-$(CONFIG_SX9500) += sx9500.o +obj-$(CONFIG_VCNL3020) += vcnl3020.o obj-$(CONFIG_VL53L0X_I2C) += vl53l0x-i2c.o diff --git a/drivers/iio/proximity/vcnl3020.c b/drivers/iio/proximity/vcnl3020.c new file mode 100644 index 000000000000..9ff1a164c2e6 --- /dev/null +++ b/drivers/iio/proximity/vcnl3020.c @@ -0,0 +1,258 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Support for Vishay VCNL3020 proximity sensor on i2c bus. + * Based on Vishay VCNL4000 driver code. + * + * TODO: interrupts. + */ + +#include +#include +#include +#include +#include + +#include +#include + +#define VCNL3020_PROD_ID 0x21 + +#define VCNL_COMMAND 0x80 /* Command register */ +#define VCNL_PROD_REV 0x81 /* Product ID and Revision ID */ +#define VCNL_PROXIMITY_RATE 0x82 /* Rate of Proximity Measurement */ +#define VCNL_LED_CURRENT 0x83 /* IR LED current for proximity mode */ +#define VCNL_PS_RESULT_HI 0x87 /* Proximity result register, MSB */ +#define VCNL_PS_RESULT_LO 0x88 /* Proximity result register, LSB */ +#define VCNL_PS_ICR 0x89 /* Interrupt Control Register */ +#define VCNL_PS_LO_THR_HI 0x8a /* High byte of low threshold value */ +#define VCNL_PS_LO_THR_LO 0x8b /* Low byte of low threshold value */ +#define VCNL_PS_HI_THR_HI 0x8c /* High byte of high threshold value */ +#define VCNL_PS_HI_THR_LO 0x8d /* Low byte of high threshold value */ +#define VCNL_ISR 0x8e /* Interrupt Status Register */ +#define VCNL_PS_MOD_ADJ 0x8f /* Proximity Modulator Timing Adjustment */ + +/* Bit masks for COMMAND register */ +#define VCNL_PS_RDY BIT(5) /* proximity data ready? */ +#define VCNL_PS_OD BIT(3) /* start on-demand proximity + * measurement + */ + +#define VCNL_ON_DEMAND_TIMEOUT_US 100000 +#define VCNL_POLL_US 20000 + +/** + * struct vcnl3020_data - vcnl3020 specific data. + * @regmap: device register map. + * @dev: vcnl3020 device. + * @rev: revision id. + * @lock: lock for protecting access to device hardware registers. + */ +struct vcnl3020_data { + struct regmap *regmap; + struct device *dev; + u8 rev; + struct mutex lock; +}; + +/** + * struct vcnl3020_property - vcnl3020 property. + * @name: property name. + * @reg: i2c register offset. + * @conversion_func: conversion function. + */ +struct vcnl3020_property { + const char *name; + u32 reg; + u32 (*conversion_func)(u32 *val); +}; + +static u32 microamp_to_reg(u32 *val) +{ + /* + * An example of conversion from uA to reg val: + * 200000 uA == 200 mA == 20 + */ + return *val /= 10000; +}; + +static struct vcnl3020_property vcnl3020_led_current_property = { + .name = "vishay,led-current-microamp", + .reg = VCNL_LED_CURRENT, + .conversion_func = microamp_to_reg, +}; + +static int vcnl3020_get_and_apply_property(struct vcnl3020_data *data, + struct vcnl3020_property prop) +{ + int rc; + u32 val; + + rc = device_property_read_u32(data->dev, prop.name, &val); + if (rc) + return 0; + + if (prop.conversion_func) + prop.conversion_func(&val); + + rc = regmap_write(data->regmap, prop.reg, val); + if (rc) { + dev_err(data->dev, "Error (%d) setting property (%s)\n", + rc, prop.name); + } + + return rc; +} + +static int vcnl3020_init(struct vcnl3020_data *data) +{ + int rc; + unsigned int reg; + + rc = regmap_read(data->regmap, VCNL_PROD_REV, ®); + if (rc) { + dev_err(data->dev, + "Error (%d) reading product revision\n", rc); + return rc; + } + + if (reg != VCNL3020_PROD_ID) { + dev_err(data->dev, + "Product id (%x) did not match vcnl3020 (%x)\n", reg, + VCNL3020_PROD_ID); + return -ENODEV; + } + + data->rev = reg; + mutex_init(&data->lock); + + return vcnl3020_get_and_apply_property(data, + vcnl3020_led_current_property); +}; + +static int vcnl3020_measure_proximity(struct vcnl3020_data *data, int *val) +{ + int rc; + unsigned int reg; + __be16 res; + + mutex_lock(&data->lock); + + rc = regmap_write(data->regmap, VCNL_COMMAND, VCNL_PS_OD); + if (rc) + goto err_unlock; + + /* wait for data to become ready */ + rc = regmap_read_poll_timeout(data->regmap, VCNL_COMMAND, reg, + reg & VCNL_PS_RDY, VCNL_POLL_US, + VCNL_ON_DEMAND_TIMEOUT_US); + if (rc) { + dev_err(data->dev, + "Error (%d) reading vcnl3020 command register\n", rc); + goto err_unlock; + } + + /* high & low result bytes read */ + rc = regmap_bulk_read(data->regmap, VCNL_PS_RESULT_HI, &res, + sizeof(res)); + if (rc) + goto err_unlock; + + *val = be16_to_cpu(res); + +err_unlock: + mutex_unlock(&data->lock); + + return rc; +} + +static const struct iio_chan_spec vcnl3020_channels[] = { + { + .type = IIO_PROXIMITY, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + }, +}; + +static int vcnl3020_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + int rc; + struct vcnl3020_data *data = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + rc = vcnl3020_measure_proximity(data, val); + if (rc) + return rc; + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + +static const struct iio_info vcnl3020_info = { + .read_raw = vcnl3020_read_raw, +}; + +static const struct regmap_config vcnl3020_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = VCNL_PS_MOD_ADJ, +}; + +static int vcnl3020_probe(struct i2c_client *client) +{ + struct vcnl3020_data *data; + struct iio_dev *indio_dev; + struct regmap *regmap; + int rc; + + regmap = devm_regmap_init_i2c(client, &vcnl3020_regmap_config); + if (IS_ERR(regmap)) { + dev_err(&client->dev, "regmap_init failed\n"); + return PTR_ERR(regmap); + } + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + data->regmap = regmap; + data->dev = &client->dev; + + rc = vcnl3020_init(data); + if (rc) + return rc; + + indio_dev->dev.parent = &client->dev; + indio_dev->info = &vcnl3020_info; + indio_dev->channels = vcnl3020_channels; + indio_dev->num_channels = ARRAY_SIZE(vcnl3020_channels); + indio_dev->name = "vcnl3020"; + indio_dev->modes = INDIO_DIRECT_MODE; + + return devm_iio_device_register(&client->dev, indio_dev); +} + +static const struct of_device_id vcnl3020_of_match[] = { + { + .compatible = "vishay,vcnl3020", + }, + {} +}; +MODULE_DEVICE_TABLE(of, vcnl3020_of_match); + +static struct i2c_driver vcnl3020_driver = { + .driver = { + .name = "vcnl3020", + .of_match_table = vcnl3020_of_match, + }, + .probe_new = vcnl3020_probe, +}; +module_i2c_driver(vcnl3020_driver); + +MODULE_AUTHOR("Ivan Mikhaylov "); +MODULE_DESCRIPTION("Vishay VCNL3020 proximity sensor driver"); +MODULE_LICENSE("GPL");