From patchwork Sat Nov 25 11:56:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javier Carrasco X-Patchwork-Id: 747274 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="nhEyZBFS" Received: from mail-ej1-x62a.google.com (mail-ej1-x62a.google.com [IPv6:2a00:1450:4864:20::62a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8065010EB; Sat, 25 Nov 2023 03:57:01 -0800 (PST) Received: by mail-ej1-x62a.google.com with SMTP id a640c23a62f3a-a02cc476581so366731466b.2; Sat, 25 Nov 2023 03:57:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700913419; x=1701518219; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=PyJvKifjCksa9ZtBNafx8NGbx/DvHUPSdg3ul1e3Sf4=; b=nhEyZBFS75LTwG5A1CA0WyQ9lpZN69d56raOV4FA9Tajf1+/tBcUEatJiipkJw8pKO +jMvFlBUjiAplXUZEkUEEh4ASBWjxHC4L/w0B52eGNQIRXb/ItbDLRV0R7Me42svmo/M 6E8eY3yQfSg45NH+SVruZF9O5AZXgELsR1h7jboElijVtt6tDTtLsy7eALDqDeYGCal+ CQlPIH8+stGbBKLXpgd4RkRfgbcW9XObOBpWCTQgPZiZkrph697vfbqljAEcCL+Lt+4A qcUj/LCIUz6+7OKmJQ7syigkDiYc/+VWEAxgg/keCVNuuUyHdebctELnjMEfQgJ/bP6J b7sA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700913419; x=1701518219; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=PyJvKifjCksa9ZtBNafx8NGbx/DvHUPSdg3ul1e3Sf4=; b=K574I+c9eq8Ij6CPmQWIRoeKXM1LbS9KVIEU+kqM/It1p3CwC8QU38h8lf6twlOwF9 wI9Y9avzaI313y6/ePO0Dg5wmGZ9t2PfE2Cv0kgAMV3UNfZv4+ur5tfmUja106KrAl6b eCdUKGZ0eBp1Ie0t8Wq7++c49wBgVuu1vyIT5QbK7AF+YKgy7IOUy4yXhF9uhtcCF0fM UFxG0oC1fEFBYfvlHcmWDbhgmc+b0fF4QVyJGEDMRZmGLhScDJng6YIv0yA4yLKvDbcb Yy4nTyTuu/Cg3Z31MeKbwo4q9HdMbuDqOc0N4EGArMMFEvvy7l6Dnyre01ES5UkZHH/+ ZCrw== X-Gm-Message-State: AOJu0Ywey7Fsr5L/6Zl8LL3gEisyd68vTl6PRRaxbErokoFMj6oBp/A1 /nOqh/szptWDspOZz6UevaLIIeOHcenFhA== X-Google-Smtp-Source: AGHT+IG6Dos7XvaZp1QxtaDVXbxvbrQUpf8xoJ/l9hNlCRHIbkDVY5CPpxOcmmPnX+niof183sAakg== X-Received: by 2002:a17:906:6711:b0:a01:77ef:e887 with SMTP id a17-20020a170906671100b00a0177efe887mr4026945ejp.64.1700913419355; Sat, 25 Nov 2023 03:56:59 -0800 (PST) Received: from [127.0.1.1] (2a02-8389-41cf-e200-3176-084d-819d-12bf.cable.dynamic.v6.surfer.at. [2a02:8389:41cf:e200:3176:84d:819d:12bf]) by smtp.gmail.com with ESMTPSA id r17-20020a170906a21100b009ae57888718sm3344349ejy.207.2023.11.25.03.56.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 25 Nov 2023 03:56:59 -0800 (PST) From: Javier Carrasco Date: Sat, 25 Nov 2023 12:56:55 +0100 Subject: [PATCH v2 1/3] iio: add modifiers for A and B ultraviolet light Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20231110-veml6075-v2-1-d04efbc8bf51@gmail.com> References: <20231110-veml6075-v2-0-d04efbc8bf51@gmail.com> In-Reply-To: <20231110-veml6075-v2-0-d04efbc8bf51@gmail.com> To: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, Javier Carrasco X-Mailer: b4 0.12.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1700913416; l=3539; i=javier.carrasco.cruz@gmail.com; s=20230509; h=from:subject:message-id; bh=nymkBqy1zy5W1DkFZRCIlPpGK++jMxfNLk6XrJLr6Js=; b=qTOSDOAdV6ujrNBtJLLo1oxm+L27V6lBQRWNroF8w4wBc/fqjphx/ReyrlCEsOmzQVvnI5c84 7KJI/7mSyODApjQZpWYoM8uVjF85UkNqfvWXu3+D9nUQVz9BbxYWn5A X-Developer-Key: i=javier.carrasco.cruz@gmail.com; a=ed25519; pk=tIGJV7M+tCizagNijF0eGMBGcOsPD+0cWGfKjl4h6K8= Currently there are only two modifiers for ultraviolet light: a generic one for any ultraviolet light (IIO_MOD_LIGHT_UV) and one for deep ultraviolet (IIO_MOD_LIGHT_DUV), which is also referred as ultraviolet C (UV-C) band and covers short-wave ultraviolet. There are still no modifiers for the long-wave and medium-wave ultraviolet bands. These two bands are the main components used to obtain the UV index on the Earth's surface. Add modifiers for the ultraviolet A (UV-A) and ultraviolet B (UV-B) bands. Signed-off-by: Javier Carrasco --- Documentation/ABI/testing/sysfs-bus-iio | 7 +++++-- drivers/iio/industrialio-core.c | 2 ++ include/uapi/linux/iio/types.h | 2 ++ tools/iio/iio_event_monitor.c | 2 ++ 4 files changed, 11 insertions(+), 2 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index 19cde14f3869..e2a9937be99c 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -1574,6 +1574,8 @@ What: /sys/.../iio:deviceX/in_intensityY_raw What: /sys/.../iio:deviceX/in_intensityY_ir_raw What: /sys/.../iio:deviceX/in_intensityY_both_raw What: /sys/.../iio:deviceX/in_intensityY_uv_raw +What: /sys/.../iio:deviceX/in_intensityY_uva_raw +What: /sys/.../iio:deviceX/in_intensityY_uvb_raw What: /sys/.../iio:deviceX/in_intensityY_duv_raw KernelVersion: 3.4 Contact: linux-iio@vger.kernel.org @@ -1582,8 +1584,9 @@ Description: that measurements contain visible and infrared light components or just infrared light, respectively. Modifier uv indicates that measurements contain ultraviolet light - components. Modifier duv indicates that measurements - contain deep ultraviolet light components. + components. Modifiers uva, uvb and duv indicate that + measurements contain A, B or deep (C) ultraviolet light + components respectively. What: /sys/.../iio:deviceX/in_uvindex_input KernelVersion: 4.6 diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index c77745b594bd..65f567e4ff2a 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -117,6 +117,8 @@ static const char * const iio_modifier_names[] = { [IIO_MOD_LIGHT_GREEN] = "green", [IIO_MOD_LIGHT_BLUE] = "blue", [IIO_MOD_LIGHT_UV] = "uv", + [IIO_MOD_LIGHT_UVA] = "uva", + [IIO_MOD_LIGHT_UVB] = "uvb", [IIO_MOD_LIGHT_DUV] = "duv", [IIO_MOD_QUATERNION] = "quaternion", [IIO_MOD_TEMP_AMBIENT] = "ambient", diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h index 9c2ffdcd6623..5060963707b1 100644 --- a/include/uapi/linux/iio/types.h +++ b/include/uapi/linux/iio/types.h @@ -91,6 +91,8 @@ enum iio_modifier { IIO_MOD_CO2, IIO_MOD_VOC, IIO_MOD_LIGHT_UV, + IIO_MOD_LIGHT_UVA, + IIO_MOD_LIGHT_UVB, IIO_MOD_LIGHT_DUV, IIO_MOD_PM1, IIO_MOD_PM2P5, diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c index 2eaaa7123b04..8073c9e4fe46 100644 --- a/tools/iio/iio_event_monitor.c +++ b/tools/iio/iio_event_monitor.c @@ -105,6 +105,8 @@ static const char * const iio_modifier_names[] = { [IIO_MOD_LIGHT_GREEN] = "green", [IIO_MOD_LIGHT_BLUE] = "blue", [IIO_MOD_LIGHT_UV] = "uv", + [IIO_MOD_LIGHT_UVA] = "uva", + [IIO_MOD_LIGHT_UVB] = "uvb", [IIO_MOD_LIGHT_DUV] = "duv", [IIO_MOD_QUATERNION] = "quaternion", [IIO_MOD_TEMP_AMBIENT] = "ambient", From patchwork Sat Nov 25 11:56:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javier Carrasco X-Patchwork-Id: 747273 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="NJ9SP5+S" Received: from mail-ej1-x631.google.com (mail-ej1-x631.google.com [IPv6:2a00:1450:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2121C10E7; Sat, 25 Nov 2023 03:57:04 -0800 (PST) Received: by mail-ej1-x631.google.com with SMTP id a640c23a62f3a-a02d12a2444so397740966b.3; Sat, 25 Nov 2023 03:57:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700913422; x=1701518222; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=hh9vZxL4rHi7//Khkg+z1SWYB8RqWtPqX2G6QnLn8GQ=; b=NJ9SP5+S78QzAGqXXt3QKROCUaIcmLciWwZ+7M5raS9UfuMcBljypDLk9e+529cwMj kyQAELE8lCVi7hRyOM73Pylo3odEbeDyFTHmm/HqUE7kSJvzWXHkdkKomYOZXEDY08eb LZE4PAio3a2KABAGLB3Rj+4eMeXpaWkOjBY2QGHuI6V0pJY9duBkMUMncluf7ylfDH1s VSMB8ueoDA/YlPtx0ITc489ZSmJGhItRDDmv7baol5RfHd5qCH6soRfiCui3tLjGjP2F CC3+H7H9iOws8cabMk3JnaC28NhGtcQcgsiu5tJOdMuPV6HwbiVhps+wbsAKzFo8smbC Klsw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700913422; x=1701518222; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=hh9vZxL4rHi7//Khkg+z1SWYB8RqWtPqX2G6QnLn8GQ=; b=LPb0jdGLDAc+UFp3nevky2pz8T8p3fTZOMZSBHAnVL5DCOPUBXK7PC5/ydKOGzbX6y m8hfGNWOagEDuXe9bCroLF5z0sQS94UsUOj+Jb50EYe/3sBcPbvX94Q5/jztCR+Q8Tr8 V1wK02wXNHc4+UOT8drbxba2QOZnG/tCCijOlKOVsUmhukfwZmLLbO44c9bSKvCkx+ou lBYrVYxn2NP7+ijH5N3zdsHu6M4vCMBWsxq9oERoP+LpFpISUOXrrLEYBfpLYSe8jJ7f WKr6po2rZqjHoIKe4lGwoOwJGNxeScbqkaB2Sgbxn+YxuiUqGELHbMIKl/V1eIB4xRSV tUNg== X-Gm-Message-State: AOJu0YzCvlYUJdcaUeLiVR8HKVtce2o5RuzXLuY4efF6vy5UiYxUs0nE GST2EAzSjhZmJTCr++ygEQCKCVRnXbw+tQ== X-Google-Smtp-Source: AGHT+IHxP9ghozljY/BHCFCGEqkaLaBByt90/SuewITK6uX24BmQIHzok8pFU9+s+Hn+E/rjNU7kDA== X-Received: by 2002:a17:906:1019:b0:9ff:dad:de15 with SMTP id 25-20020a170906101900b009ff0dadde15mr4184820ejm.50.1700913422137; Sat, 25 Nov 2023 03:57:02 -0800 (PST) Received: from [127.0.1.1] (2a02-8389-41cf-e200-3176-084d-819d-12bf.cable.dynamic.v6.surfer.at. [2a02:8389:41cf:e200:3176:84d:819d:12bf]) by smtp.gmail.com with ESMTPSA id r17-20020a170906a21100b009ae57888718sm3344349ejy.207.2023.11.25.03.57.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 25 Nov 2023 03:57:01 -0800 (PST) From: Javier Carrasco Date: Sat, 25 Nov 2023 12:56:57 +0100 Subject: [PATCH v2 3/3] iio: light: add VEML6075 UVA and UVB light sensor driver Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20231110-veml6075-v2-3-d04efbc8bf51@gmail.com> References: <20231110-veml6075-v2-0-d04efbc8bf51@gmail.com> In-Reply-To: <20231110-veml6075-v2-0-d04efbc8bf51@gmail.com> To: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, Javier Carrasco X-Mailer: b4 0.12.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1700913416; l=15485; i=javier.carrasco.cruz@gmail.com; s=20230509; h=from:subject:message-id; bh=YwkaZng5pAN3PTKkBmv+rawXHP6XARNO7S50VB0HjX8=; b=njsQrdJ1bfXsU/3DCGVy94CQ9zNk76Ya6J34RUMSBVVLysng8SyUQyvnGmfsmeeFpFAIEkOco MhYl0pKOgvXCbvv+hnc3QfkezCqHUL9EajVNBfVVzQeROCVN+kPr05o X-Developer-Key: i=javier.carrasco.cruz@gmail.com; a=ed25519; pk=tIGJV7M+tCizagNijF0eGMBGcOsPD+0cWGfKjl4h6K8= The Vishay VEMl6075 is a low power, 16-bit resolution UVA and UVB light sensor with I2C interface and noise compensation (visible and infrarred). Every UV channel generates an output signal measured in counts per integration period, where the integration time is configurable. This driver adds support for both UV channels and the ultraviolet index (UVI) inferred from them according to the device application note with open-air (no teflon) coefficients. Signed-off-by: Javier Carrasco --- MAINTAINERS | 6 + drivers/iio/light/Kconfig | 11 + drivers/iio/light/Makefile | 1 + drivers/iio/light/veml6075.c | 486 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 504 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 97f51d5ec1cf..4ebf66036f6a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -23184,6 +23184,12 @@ S: Maintained F: drivers/input/serio/userio.c F: include/uapi/linux/userio.h +VISHAY VEML6075 UVA AND UVB LIGHT SENSOR DRIVER +M: Javier Carrasco +S: Maintained +F: Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml +F: drivers/iio/light/veml6075.c + VISL VIRTUAL STATELESS DECODER DRIVER M: Daniel Almeida L: linux-media@vger.kernel.org diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index 45edba797e4c..f68e62196bc2 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -637,6 +637,17 @@ config VEML6070 To compile this driver as a module, choose M here: the module will be called veml6070. +config VEML6075 + tristate "VEML6075 UVA and UVB light sensor" + select REGMAP_I2C + depends on I2C + help + Say Y here if you want to build a driver for the Vishay VEML6075 UVA + and UVB light sensor. + + To compile this driver as a module, choose M here: the + module will be called veml6075. + config VL6180 tristate "VL6180 ALS, range and proximity sensor" depends on I2C diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile index c0db4c4c36ec..c8289e24e3f6 100644 --- a/drivers/iio/light/Makefile +++ b/drivers/iio/light/Makefile @@ -60,5 +60,6 @@ obj-$(CONFIG_VCNL4000) += vcnl4000.o obj-$(CONFIG_VCNL4035) += vcnl4035.o obj-$(CONFIG_VEML6030) += veml6030.o obj-$(CONFIG_VEML6070) += veml6070.o +obj-$(CONFIG_VEML6075) += veml6075.o obj-$(CONFIG_VL6180) += vl6180.o obj-$(CONFIG_ZOPT2201) += zopt2201.o diff --git a/drivers/iio/light/veml6075.c b/drivers/iio/light/veml6075.c new file mode 100644 index 000000000000..a33488884076 --- /dev/null +++ b/drivers/iio/light/veml6075.c @@ -0,0 +1,486 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Vishay VEML6075 UVA and UVB light sensor + * + * Copyright 2023 Javier Carrasco + * + * 7-bit I2C slave, address 0x10 + */ + +#include +#include +#include +#include +#include +#include +#include + +#include + +#define VEML6075_CMD_CONF 0x00 /* configuration register */ +#define VEML6075_CMD_UVA 0x07 /* UVA channel */ +#define VEML6075_CMD_UVB 0x09 /* UVB channel */ +#define VEML6075_CMD_COMP1 0x0A /* visible light compensation */ +#define VEML6075_CMD_COMP2 0x0B /* infrarred light compensation */ +#define VEML6075_CMD_ID 0x0C /* device ID */ + +#define VEML6075_CONF_IT GENMASK(6, 4) /* intregration time */ +#define VEML6075_CONF_HD BIT(3) /* dynamic setting */ +#define VEML6075_CONF_TRIG BIT(2) /* trigger */ +#define VEML6075_CONF_AF BIT(1) /* active force enable */ +#define VEML6075_CONF_SD BIT(0) /* shutdown */ + +#define VEML6075_IT_50_MS 0x00 +#define VEML6075_IT_100_MS 0x01 +#define VEML6075_IT_200_MS 0x02 +#define VEML6075_IT_400_MS 0x03 +#define VEML6075_IT_800_MS 0x04 + +#define VEML6075_AF_DISABLE 0x00 +#define VEML6075_AF_ENABLE 0x01 + +#define VEML6075_SD_DISABLE 0x00 +#define VEML6075_SD_ENABLE 0x01 + +/* Open-air coefficients and responsivity */ +#define VEML6075_A_COEF 2220 +#define VEML6075_B_COEF 1330 +#define VEML6075_C_COEF 2950 +#define VEML6075_D_COEF 1740 +#define VEML6075_UVA_RESP 1461 +#define VEML6075_UVB_RESP 2591 + +static const int veml6075_it_ms[] = { 50, 100, 200, 400, 800 }; + +struct veml6075_data { + struct i2c_client *client; + struct regmap *regmap; + struct mutex lock; /* integration time/measurement trigger lock */ +}; + +/* channel number */ +enum veml6075_chan { + CH_UVA, + CH_UVB, +}; + +static const struct iio_chan_spec veml6075_channels[] = { + { + .type = IIO_INTENSITY, + .channel = CH_UVA, + .modified = 1, + .channel2 = IIO_MOD_LIGHT_UVA, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME), + .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME), + }, + { + .type = IIO_INTENSITY, + .channel = CH_UVB, + .modified = 1, + .channel2 = IIO_MOD_LIGHT_UVB, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME), + .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME), + }, + { + .type = IIO_UVINDEX, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME), + .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME), + }, +}; + +static int veml6075_shutdown(struct veml6075_data *data) +{ + return regmap_update_bits(data->regmap, VEML6075_CMD_CONF, + VEML6075_CONF_SD, VEML6075_CONF_SD); +} + +static int veml6075_request_measurement(struct veml6075_data *data) +{ + int ret, conf, int_time; + + ret = regmap_read(data->regmap, VEML6075_CMD_CONF, &conf); + if (ret < 0) + return ret; + + /* disable shutdown and trigger measurement */ + ret = regmap_write(data->regmap, VEML6075_CMD_CONF, + (conf | VEML6075_CONF_TRIG) & ~VEML6075_CONF_SD); + if (ret < 0) + return ret; + + /* + * A measurement requires between 1.30 and 1.40 times the integration + * time for all possible configurations. Using a 1.50 factor simplifies + * operations and ensures reliability under all circumstances. + */ + int_time = veml6075_it_ms[FIELD_GET(VEML6075_CONF_IT, conf)]; + msleep(int_time + (int_time / 2)); + + /* shutdown again, data registers are still accessible */ + return veml6075_shutdown(data); +} + +static int veml6075_uva_comp(int raw_uva, int comp1, int comp2) +{ + int comp1a_c, comp2a_c, uva_comp; + + comp1a_c = (comp1 * VEML6075_A_COEF) / 1000U; + comp2a_c = (comp2 * VEML6075_B_COEF) / 1000U; + uva_comp = raw_uva - comp1a_c - comp2a_c; + + return clamp_val(uva_comp, 0, U16_MAX); +} + +static int veml6075_uvb_comp(int raw_uvb, int comp1, int comp2) +{ + int comp1b_c, comp2b_c, uvb_comp; + + comp1b_c = (comp1 * VEML6075_C_COEF) / 1000U; + comp2b_c = (comp2 * VEML6075_D_COEF) / 1000U; + uvb_comp = raw_uvb - comp1b_c - comp2b_c; + + return clamp_val(uvb_comp, 0, U16_MAX); +} + +static int veml6075_read_comp(struct veml6075_data *data, int *c1, int *c2) +{ + int ret; + + ret = regmap_read(data->regmap, VEML6075_CMD_COMP1, c1); + if (ret < 0) + return ret; + + return regmap_read(data->regmap, VEML6075_CMD_COMP2, c2); +} + +static int veml6075_read_uv_direct(struct veml6075_data *data, int chan, + int *val) +{ + int c1, c2, ret; + + guard(mutex)(&data->lock); + + ret = veml6075_request_measurement(data); + if (ret < 0) + return ret; + + ret = veml6075_read_comp(data, &c1, &c2); + if (ret < 0) + return ret; + + switch (chan) { + case CH_UVA: + ret = regmap_read(data->regmap, VEML6075_CMD_UVA, val); + if (ret < 0) + return ret; + + *val = veml6075_uva_comp(*val, c1, c2); + return IIO_VAL_INT; + case CH_UVB: + ret = regmap_read(data->regmap, VEML6075_CMD_UVB, val); + if (ret < 0) + return ret; + + *val = veml6075_uvb_comp(*val, c1, c2); + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + +static int veml6075_read_int_time_index(struct veml6075_data *data) +{ + int ret, conf; + + ret = regmap_read(data->regmap, VEML6075_CMD_CONF, &conf); + if (ret < 0) + return ret; + + return FIELD_GET(VEML6075_CONF_IT, conf); +} + +static int veml6075_read_int_time_ms(struct veml6075_data *data, int *val) +{ + int int_index; + + guard(mutex)(&data->lock); + int_index = veml6075_read_int_time_index(data); + if (int_index < 0) + return int_index; + + *val = veml6075_it_ms[int_index]; + + return IIO_VAL_INT; +} + +static int veml6075_get_uvi_micro(struct veml6075_data *data, int uva_comp, + int uvb_comp) +{ + int uvia_micro = uva_comp * VEML6075_UVA_RESP; + int uvib_micro = uvb_comp * VEML6075_UVB_RESP; + int int_index; + + int_index = veml6075_read_int_time_index(data); + if (int_index < 0) + return int_index; + + switch (int_index) { + case VEML6075_IT_50_MS: + return uvia_micro + uvib_micro; + case VEML6075_IT_100_MS: + case VEML6075_IT_200_MS: + case VEML6075_IT_400_MS: + case VEML6075_IT_800_MS: + return (uvia_micro + uvib_micro) / (2 << int_index); + default: + return -EINVAL; + } +} + +static int veml6075_read_uvi(struct veml6075_data *data, int *val, int *val2) +{ + int ret, c1, c2, uva, uvb, uvi_micro; + + guard(mutex)(&data->lock); + + ret = veml6075_request_measurement(data); + if (ret < 0) + return ret; + + ret = veml6075_read_comp(data, &c1, &c2); + if (ret < 0) + return ret; + + ret = regmap_read(data->regmap, VEML6075_CMD_UVA, &uva); + if (ret < 0) + return ret; + + ret = regmap_read(data->regmap, VEML6075_CMD_UVB, &uvb); + if (ret < 0) + return ret; + + uvi_micro = veml6075_get_uvi_micro(data, veml6075_uva_comp(uva, c1, c2), + veml6075_uvb_comp(uvb, c1, c2)); + if (uvi_micro < 0) + return uvi_micro; + + *val = uvi_micro / 1000000LL; + *val2 = uvi_micro % 1000000LL; + + return IIO_VAL_INT_PLUS_MICRO; +} + +static int veml6075_read_responsivity(int chan, int *val, int *val2) +{ + /* scale = 1 / resp */ + switch (chan) { + case CH_UVA: + /* resp = 0.93 c/uW/cm2: scale = 1.75268817 */ + *val = 1; + *val2 = 75268817; + return IIO_VAL_INT_PLUS_NANO; + case CH_UVB: + /* resp = 2.1 c/uW/cm2: scale = 0.476190476 */ + *val = 0; + *val2 = 476190476; + return IIO_VAL_INT_PLUS_NANO; + default: + return -EINVAL; + } +} + +static int veml6075_read_avail(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, + long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_INT_TIME: + *length = ARRAY_SIZE(veml6075_it_ms); + *vals = veml6075_it_ms; + *type = IIO_VAL_INT; + return IIO_AVAIL_LIST; + + default: + return -EINVAL; + } +} + +static int veml6075_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct veml6075_data *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = veml6075_read_uv_direct(data, chan->channel, val); + break; + case IIO_CHAN_INFO_PROCESSED: + ret = veml6075_read_uvi(data, val, val2); + break; + case IIO_CHAN_INFO_INT_TIME: + ret = veml6075_read_int_time_ms(data, val); + break; + case IIO_CHAN_INFO_SCALE: + return veml6075_read_responsivity(chan->channel, val, val2); + default: + return -EINVAL; + } + + return ret; +} + +static int veml6075_write_int_time_ms(struct veml6075_data *data, int val) +{ + int i = ARRAY_SIZE(veml6075_it_ms); + + guard(mutex)(&data->lock); + + while (i-- > 0) { + if (val == veml6075_it_ms[i]) + break; + } + if (i < 0) + return -EINVAL; + + return regmap_update_bits(data->regmap, VEML6075_CMD_CONF, + VEML6075_CONF_IT, + FIELD_PREP(VEML6075_CONF_IT, i)); +} + +static int veml6075_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct veml6075_data *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_INT_TIME: + ret = veml6075_write_int_time_ms(data, val); + break; + default: + return -EINVAL; + } + + return ret; +} + +static const struct iio_info veml6075_info = { + .read_avail = veml6075_read_avail, + .read_raw = veml6075_read_raw, + .write_raw = veml6075_write_raw, +}; + +static bool veml6075_readable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case VEML6075_CMD_CONF: + case VEML6075_CMD_UVA: + case VEML6075_CMD_UVB: + case VEML6075_CMD_COMP1: + case VEML6075_CMD_COMP2: + case VEML6075_CMD_ID: + return true; + default: + return false; + } +} + +static bool veml6075_writable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case VEML6075_CMD_CONF: + return true; + default: + return false; + } +} + +static const struct regmap_config veml6075_regmap_config = { + .name = "veml6075", + .reg_bits = 8, + .val_bits = 16, + .max_register = VEML6075_CMD_ID, + .readable_reg = veml6075_readable_reg, + .writeable_reg = veml6075_writable_reg, + .val_format_endian = REGMAP_ENDIAN_LITTLE, + +}; + +static int veml6075_probe(struct i2c_client *client) +{ + struct veml6075_data *data; + struct iio_dev *indio_dev; + struct regmap *regmap; + int config, ret; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + regmap = devm_regmap_init_i2c(client, &veml6075_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + data = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + data->client = client; + data->regmap = regmap; + + mutex_init(&data->lock); + + indio_dev->name = "veml6075"; + indio_dev->info = &veml6075_info; + indio_dev->channels = veml6075_channels; + indio_dev->num_channels = ARRAY_SIZE(veml6075_channels); + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = devm_regulator_get_enable(&client->dev, "vdd"); + if (ret < 0 && ret != -ENODEV) + return ret; + + /* default: 100ms integration time, active force enable, shutdown */ + config = FIELD_PREP(VEML6075_CONF_IT, VEML6075_IT_100_MS) | + FIELD_PREP(VEML6075_CONF_AF, VEML6075_AF_ENABLE) | + FIELD_PREP(VEML6075_CONF_SD, VEML6075_SD_ENABLE); + ret = regmap_write(data->regmap, VEML6075_CMD_CONF, config); + if (ret < 0) + return ret; + + return devm_iio_device_register(&client->dev, indio_dev); +} + +static const struct i2c_device_id veml6075_id[] = { + { "veml6075" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, veml6075_id); + +static const struct of_device_id veml6075_of_match[] = { + { .compatible = "vishay,veml6075" }, + {} +}; +MODULE_DEVICE_TABLE(of, veml6075_of_match); + +static struct i2c_driver veml6075_driver = { + .driver = { + .name = "veml6075", + .of_match_table = veml6075_of_match, + }, + .probe = veml6075_probe, + .id_table = veml6075_id, +}; + +module_i2c_driver(veml6075_driver); + +MODULE_AUTHOR("Javier Carrasco "); +MODULE_DESCRIPTION("Vishay VEML6075 UVA and UVB light sensor driver"); +MODULE_LICENSE("GPL");