From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CB45EC05027 for ; Mon, 23 Jan 2023 23:11:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232499AbjAWXLS (ORCPT ); Mon, 23 Jan 2023 18:11:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44492 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232564AbjAWXLO (ORCPT ); Mon, 23 Jan 2023 18:11:14 -0500 Received: from mail-ej1-x62d.google.com (mail-ej1-x62d.google.com [IPv6:2a00:1450:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 75440392B1; Mon, 23 Jan 2023 15:11:07 -0800 (PST) Received: by mail-ej1-x62d.google.com with SMTP id bk15so34558153ejb.9; Mon, 23 Jan 2023 15:11:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=nlmvRomHtcVCsgxI9mL922H8tGvbIBB4555k2PJ7e+4=; b=qKgqUzVNLgqlWfIYsU7V/r2tsX8f5caJIwrn8KpeyZYKxN3Qe1J3txm00XqFbNDl1r /RBxZL/68PoZRWqHL7+8x+627WggjG9Js1PY1nRCGeZoHCUHKYoHGpsIoyZOHsPfwiNK oAnUejOPqrLQy1B8IBBlWYcNDENQdNpRdGc67TRhicwEohP3Zb9TFNxw2j4S45g8s/No DmTmSdahyCyltIx+loNg295n7kLgba7URWXWyhxA9xMmZYR2V7Xc3ds2GY9tJjk5Kud8 IqkOwU866jxc79ZmRpOW1MJGd7/bHybWMNmBpbu53cZWVeu2LI9wMWckdrKjWHStSTlL +BHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=nlmvRomHtcVCsgxI9mL922H8tGvbIBB4555k2PJ7e+4=; b=bJPwEuEDJvHqu0qIVXU/z74ti4ymVRNUwpfY7xaQgVlDBYQJpesyUOAjLFwjbjMiJv EQDnA9PWwo3VTYwnsf+XS4q3O4G7beCUGdLJ+vnesRpwI8fh9WS0Rv6EwWhkSEuU6tAS VxSlBh4ITuOTdfo5yKZzbp2ZhTdohC+LizZGZO1Ay8JLZZf6PmTpLRzdnm2IcU8wqa1A GptuRRXtJ25Ojk5YzCnUeU64pK65yCmwjedAhM0FrPcZ3imtiIKGij1zC/tYhFi3X2fk gc6bKa4Ou2Ses80ICQ+C5Dkmcw2cSax7iZ9/s7npNopM/15uLwuS52zYhuB2Ore3mJvU RSpg== X-Gm-Message-State: AFqh2koWz9NxRAk1yxw7SyV8WZU8u4/abn5mXuRpDzcOsLjxYPoORFJu xGNR5PSDvThALffrQ+/94IEU0OVPJlY= X-Google-Smtp-Source: AMrXdXtB7FOv3psBSi5KvTml/nYh3YkMxgq8+cU6jrrvoGpjdsvjjaMlplc4xsd+SFKtB7TbLTPddQ== X-Received: by 2002:a17:906:2798:b0:870:97f1:3877 with SMTP id j24-20020a170906279800b0087097f13877mr23491896ejc.53.1674515465569; Mon, 23 Jan 2023 15:11:05 -0800 (PST) Received: from localhost.localdomain ([194.39.226.133]) by smtp.gmail.com with ESMTPSA id b21-20020a170906709500b0084d43e23436sm72601ejk.38.2023.01.23.15.11.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Jan 2023 15:11:05 -0800 (PST) From: Markuss Broks To: linux-kernel@vger.kernel.org Cc: Markuss Broks , Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Andy Shevchenko , Zhigang Shi , Dmitry Osipenko , Paul Gazzillo , Shreeya Patel , linux-iio@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH 2/2] iio: light: Add support for AMS TCS3490 light sensor Date: Tue, 24 Jan 2023 01:10:25 +0200 Message-Id: <20230123231028.26073-3-markuss.broks@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230123231028.26073-1-markuss.broks@gmail.com> References: <20230123231028.26073-1-markuss.broks@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a driver for AMS TCS3490 Color Light-to-Digital Converter. This device provides color and IR (red, green, blue, clear and IR) light sensing. The color sensing can be used for light source detection and color temperature measurements. Signed-off-by: Markuss Broks --- MAINTAINERS | 7 + drivers/iio/light/Kconfig | 12 ++ drivers/iio/light/Makefile | 1 + drivers/iio/light/tcs3490.c | 270 ++++++++++++++++++++++++++++++++++++ 4 files changed, 290 insertions(+) create mode 100644 drivers/iio/light/tcs3490.c diff --git a/MAINTAINERS b/MAINTAINERS index 30e032abd196..3c47e132e4dd 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1144,6 +1144,13 @@ S: Maintained F: Documentation/devicetree/bindings/iio/light/ams,as73211.yaml F: drivers/iio/light/as73211.c +AMS TCS3490 DRIVER +M: Markuss Broks +L: linux-iio@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/iio/light/ams,tcs3490.yaml +F: drivers/iio/light/tcs3490.c + AMT (Automatic Multicast Tunneling) M: Taehee Yoo L: netdev@vger.kernel.org diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index 0d4447df7200..582e3853e835 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -494,6 +494,18 @@ config TCS3472 This driver can also be built as a module. If so, the module will be called tcs3472. +config TCS3490 + tristate "AMS TCS3490 color light-to-digital converter" + depends on I2C + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + Say Y here if you have an AMS TCS3490 color light-to digital converter + which provides RGB color and IR light sensing. + + This driver can also be built as a module. If so, the module + will be called tcs3490. + config SENSORS_TSL2563 tristate "TAOS TSL2560, TSL2561, TSL2562 and TSL2563 ambient light sensors" depends on I2C diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile index d74d2b5ff14c..81663465d8c1 100644 --- a/drivers/iio/light/Makefile +++ b/drivers/iio/light/Makefile @@ -47,6 +47,7 @@ obj-$(CONFIG_ST_UVIS25_I2C) += st_uvis25_i2c.o obj-$(CONFIG_ST_UVIS25_SPI) += st_uvis25_spi.o obj-$(CONFIG_TCS3414) += tcs3414.o obj-$(CONFIG_TCS3472) += tcs3472.o +obj-$(CONFIG_TCS3490) += tcs3490.o obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o obj-$(CONFIG_TSL2583) += tsl2583.o obj-$(CONFIG_TSL2591) += tsl2591.o diff --git a/drivers/iio/light/tcs3490.c b/drivers/iio/light/tcs3490.c new file mode 100644 index 000000000000..6fa2c220a6a1 --- /dev/null +++ b/drivers/iio/light/tcs3490.c @@ -0,0 +1,270 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * AMS TCS3490 Color Light-to-Digital Converter + * + * Copyright (c) 2023 Markuss Broks + */ + +#include +#include +#include +#include +#include +#include +#include + +#define TCS3490_SUSPEND 0 +#define TCS3490_POWER_ON_INTERNAL BIT(0) +#define TCS3490_ADC_ENABLE BIT(1) + +#define TCS3490_ENABLE 0x80 +#define TCS3490_GAIN_CTRL 0x8f +#define TCS3490_REVID 0x91 +#define TCS3490_ID 0x92 +#define TCS3490_STATUS 0x93 + +#define TCS3490_CLEAR_IR_BASE 0x94 +#define TCS3490_RED_BASE 0x96 +#define TCS3490_GREEN_BASE 0x98 +#define TCS3490_BLUE_BASE 0x9a + +#define TCS3490_CLEAR_IR_MODE 0xc0 + +#define TCS3490_STATUS_RGBC_VALID BIT(0) +#define TCS3490_STATUS_ALS_SAT BIT(7) + +#define TCS3490_MODE_CLEAR 0 +#define TCS3490_MODE_IR BIT(7) + +#define TCS3490_GAIN_MASK GENMASK(1, 0) + +#define TCS3490_LIGHT_CHANNEL(_color, _idx) { \ + .type = IIO_INTENSITY, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = \ + BIT(IIO_CHAN_INFO_CALIBSCALE), \ + .address = _idx, \ + .modified = 1, \ + .channel2 = IIO_MOD_LIGHT_##_color, \ +} \ + +struct tcs3490 { + struct i2c_client *client; + struct regmap *regmap; + struct regulator *vdd_supply; +}; + +const unsigned int tcs3490_gain_multiplier[] = {1, 4, 16, 64}; + +static const struct regmap_config tcs3490_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static const struct iio_chan_spec tcs3490_channels[] = { + TCS3490_LIGHT_CHANNEL(RED, TCS3490_RED_BASE), + TCS3490_LIGHT_CHANNEL(GREEN, TCS3490_GREEN_BASE), + TCS3490_LIGHT_CHANNEL(BLUE, TCS3490_BLUE_BASE), + TCS3490_LIGHT_CHANNEL(CLEAR, TCS3490_CLEAR_IR_BASE), + TCS3490_LIGHT_CHANNEL(IR, TCS3490_CLEAR_IR_BASE), +}; + +static int tcs3490_get_gain(struct tcs3490 *data, int *val) +{ + int ret; + unsigned int gain; + + ret = regmap_read(data->regmap, TCS3490_GAIN_CTRL, &gain); + if (ret) + return ret; + + gain &= TCS3490_GAIN_MASK; + + *val = tcs3490_gain_multiplier[gain]; + return 0; +} + +static int tcs3490_set_gain(struct tcs3490 *data, unsigned int gain) +{ + int ret, i; + + for (i = 0; i < ARRAY_SIZE(tcs3490_gain_multiplier); i++) { + if (tcs3490_gain_multiplier[i] == gain) + break; + } + + if (i == ARRAY_SIZE(tcs3490_gain_multiplier)) + return -EINVAL; + + ret = regmap_write(data->regmap, TCS3490_GAIN_CTRL, i); + if (ret) + return ret; + + return 0; +} + +static int tcs3490_read_channel(struct tcs3490 *data, + const struct iio_chan_spec *chan, + int *val) +{ + unsigned int tries = 20; + unsigned int val_l, val_h, status; + int ret; + + ret = regmap_write(data->regmap, TCS3490_ENABLE, + TCS3490_POWER_ON_INTERNAL | TCS3490_ADC_ENABLE); + if (ret) + return ret; + + switch (chan->channel2) { + case IIO_MOD_LIGHT_RED: + case IIO_MOD_LIGHT_GREEN: + case IIO_MOD_LIGHT_BLUE: + break; + case IIO_MOD_LIGHT_CLEAR: + ret = regmap_write(data->regmap, TCS3490_CLEAR_IR_MODE, TCS3490_MODE_CLEAR); + break; + case IIO_MOD_LIGHT_IR: + ret = regmap_write(data->regmap, TCS3490_CLEAR_IR_MODE, TCS3490_MODE_IR); + break; + default: + return -EINVAL; + } + + do { + usleep_range(3000, 4000); + + ret = regmap_read(data->regmap, TCS3490_STATUS, &status); + if (ret) + return ret; + if (status & TCS3490_STATUS_RGBC_VALID) + break; + } while (--tries); + + if (!tries) + return -ETIMEDOUT; + + ret = regmap_read(data->regmap, chan->address, &val_l); + if (ret) + return ret; + + ret = regmap_read(data->regmap, chan->address + 1, &val_h); + if (ret) + return ret; + + *val = (val_h << 8) | val_l; + + ret = regmap_write(data->regmap, TCS3490_ENABLE, TCS3490_SUSPEND); + if (ret) + return ret; + + return 0; +} + +static int tcs3490_read_raw(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + int *val, int *val2, long mask) +{ + struct tcs3490 *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = tcs3490_read_channel(data, chan, val); + if (ret < 0) + return ret; + + ret = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_CALIBSCALE: + ret = tcs3490_get_gain(data, val); + ret = IIO_VAL_INT; + break; + default: + ret = -EINVAL; + break; + } + + if (ret < 0) + return ret; + return IIO_VAL_INT; +} + +static int tcs3490_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct tcs3490 *data = iio_priv(indio_dev); + + if (mask == IIO_CHAN_INFO_CALIBSCALE) + return tcs3490_set_gain(data, val); + + return -EINVAL; +} + +static const struct iio_info tcs3490_info = { + .read_raw = tcs3490_read_raw, + .write_raw = tcs3490_write_raw, +}; + +static int tcs3490_probe(struct i2c_client *client) +{ + struct tcs3490 *data; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + + data->client = client; + + data->vdd_supply = devm_regulator_get(&client->dev, "vdd"); + if (IS_ERR(data->vdd_supply)) + return dev_err_probe(&client->dev, PTR_ERR(data->vdd_supply), + "Unable to get regulators\n"); + + data->regmap = devm_regmap_init_i2c(client, &tcs3490_regmap_config); + if (IS_ERR(data->regmap)) + return dev_err_probe(&client->dev, PTR_ERR(data->regmap), + "Failed to register the register map\n"); + + ret = regulator_enable(data->vdd_supply); + if (ret) + return dev_err_probe(&client->dev, ret, + "Unable to enable regulators\n"); + + indio_dev->name = "tcs3490"; + indio_dev->info = &tcs3490_info; + indio_dev->channels = tcs3490_channels; + indio_dev->num_channels = ARRAY_SIZE(tcs3490_channels); + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = regmap_write(data->regmap, TCS3490_ENABLE, TCS3490_SUSPEND); + if (ret) + return ret; + + return devm_iio_device_register(&client->dev, indio_dev); +} + +static const struct of_device_id tcs3490_of_match[] = { + { .compatible = "ams,tcs3490", }, + { }, +}; +MODULE_DEVICE_TABLE(of, tcs3490_of_match); + +static struct i2c_driver tcs3490_driver = { + .driver = { + .name = "tcs3490", + .of_match_table = of_match_ptr(tcs3490_of_match), + }, + .probe_new = tcs3490_probe, +}; + +module_i2c_driver(tcs3490_driver); + +MODULE_DESCRIPTION("AMS TCS3490 Color Light-to-Digital Converter driver"); +MODULE_AUTHOR("Markuss Broks "); +MODULE_LICENSE("GPL"); -- 2.39.0