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[2a02:8389:41cf:e200:d42c:4c9:936b:d14b]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3825fafedbcsm14570297f8f.41.2024.11.26.13.52.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Nov 2024 13:52:11 -0800 (PST) From: Javier Carrasco Date: Tue, 26 Nov 2024 22:51:54 +0100 Subject: [PATCH 1/2] dt-bindings: iio: light: veml6030: add veml6031x00 ALS series Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241126-veml6031x00-v1-1-4affa62bfefd@gmail.com> References: <20241126-veml6031x00-v1-0-4affa62bfefd@gmail.com> In-Reply-To: <20241126-veml6031x00-v1-0-4affa62bfefd@gmail.com> To: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Rishi Gupta Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Javier Carrasco X-Mailer: b4 0.14-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1732657929; l=2608; i=javier.carrasco.cruz@gmail.com; s=20240312; h=from:subject:message-id; bh=fxZJnHqWV5TFUfGk7BJsIchjMpt1tkg5hJq7UEPX+pE=; b=2n1UGwkJMixA021KNLYi2DHgIZvVZDbM8uL1h4+MOWooiib05AFwHDRsDJYMUOcTriGKB/lcc yI+jVGk1EBwA4EhrJABfIuwaYO/YZmqVPOGXPMR5Z6mZS0uIsyYuOpe X-Developer-Key: i=javier.carrasco.cruz@gmail.com; a=ed25519; pk=lzSIvIzMz0JhJrzLXI0HAdPwsNPSSmEn6RbS+PTS9aQ= These ambient light sensors share their properties with the ones from the same manufacturer that are supported by this bindings. Note that only two datasheets are provided as every one of them covers two devices (veml6031x00/veml60311x00 and veml6031x01/veml60311x01). Signed-off-by: Javier Carrasco Reviewed-by: Krzysztof Kozlowski --- .../bindings/iio/light/vishay,veml6030.yaml | 23 +++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/iio/light/vishay,veml6030.yaml b/Documentation/devicetree/bindings/iio/light/vishay,veml6030.yaml index 4ea69f1fdd63..e01e8747e47c 100644 --- a/Documentation/devicetree/bindings/iio/light/vishay,veml6030.yaml +++ b/Documentation/devicetree/bindings/iio/light/vishay,veml6030.yaml @@ -4,7 +4,9 @@ $id: http://devicetree.org/schemas/iio/light/vishay,veml6030.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# -title: VEML3235, VEML6030, VEML6035 and VEML7700 Ambient Light Sensors (ALS) +title: + VEML3235, VEML6030, VEML6031x00 series, VEML6035 and VEML7700 Ambient + Light Sensors (ALS) maintainers: - Rishi Gupta @@ -22,12 +24,18 @@ description: | Specifications about the sensors can be found at: https://www.vishay.com/docs/80131/veml3235.pdf https://www.vishay.com/docs/84366/veml6030.pdf + https://www.vishay.com/docs/80007/veml6031x00.pdf + https://www.vishay.com/docs/80008/veml6031x01.pdf https://www.vishay.com/docs/84889/veml6035.pdf https://www.vishay.com/docs/84286/veml7700.pdf properties: compatible: enum: + - vishay,veml6031x00 + - vishay,veml6031x01 + - vishay,veml60311x00 + - vishay,veml60311x01 - vishay,veml3235 - vishay,veml6030 - vishay,veml6035 @@ -67,6 +75,8 @@ allOf: properties: compatible: enum: + - vishay,veml6031x00 + - vishay,veml6031x01 - vishay,veml6035 then: properties: @@ -79,12 +89,23 @@ allOf: compatible: enum: - vishay,veml3235 + - vishay,veml60311x00 + - vishay,veml60311x01 - vishay,veml7700 then: properties: reg: enum: - 0x10 + + - if: + properties: + compatible: + enum: + - vishay,veml3235 + - vishay,veml7700 + then: + properties: interrupts: false additionalProperties: false From patchwork Tue Nov 26 21:51:55 2024 Content-Type: text/plain; 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[2a02:8389:41cf:e200:d42c:4c9:936b:d14b]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3825fafedbcsm14570297f8f.41.2024.11.26.13.52.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Nov 2024 13:52:13 -0800 (PST) From: Javier Carrasco Date: Tue, 26 Nov 2024 22:51:55 +0100 Subject: [PATCH 2/2] iio: light: add support for veml6031x00 ALS series Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241126-veml6031x00-v1-2-4affa62bfefd@gmail.com> References: <20241126-veml6031x00-v1-0-4affa62bfefd@gmail.com> In-Reply-To: <20241126-veml6031x00-v1-0-4affa62bfefd@gmail.com> To: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Rishi Gupta Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Javier Carrasco X-Mailer: b4 0.14-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1732657929; l=31965; i=javier.carrasco.cruz@gmail.com; s=20240312; h=from:subject:message-id; bh=rqwphtLoOPoHsG6FYXfAZ5N7hDP9zA8sci9sn02VjRg=; b=D7lF0CunxZR4R1Rr6dBJk022sJHWZCSXKUKYpfHFOTsjbG8vsf6Ij8jK4Yt5F4GwkD39TgBFo /umMk08pJWXDNz+3EI5TgxP9y/buE83Nz/rA4TzIMaacOSYx73u7dg2 X-Developer-Key: i=javier.carrasco.cruz@gmail.com; a=ed25519; pk=lzSIvIzMz0JhJrzLXI0HAdPwsNPSSmEn6RbS+PTS9aQ= These sensors provide two light channels (ALS and IR), I2C communication and a multiplexed interrupt line to signal data ready and configurable threshold alarms. Signed-off-by: Javier Carrasco --- MAINTAINERS | 6 + drivers/iio/light/Kconfig | 13 + drivers/iio/light/Makefile | 1 + drivers/iio/light/veml6031x00.c | 1129 +++++++++++++++++++++++++++++++++++++++ 4 files changed, 1149 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 3fd398d6e64f..b14aaa21d44b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -24664,6 +24664,12 @@ S: Maintained F: Documentation/devicetree/bindings/iio/light/vishay,veml6030.yaml F: drivers/iio/light/veml6030.c +VISHAY VEML6031X00 AMBIENT LIGHT SENSOR DRIVER +M: Javier Carrasco +S: Maintained +F: Documentation/devicetree/bindings/iio/light/vishay,veml6030.yaml +F: drivers/iio/light/veml6031x00.c + VISHAY VEML6075 UVA AND UVB LIGHT SENSOR DRIVER M: Javier Carrasco S: Maintained diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index 29ffa8491927..d75263ab637e 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -691,6 +691,19 @@ config VEML6030 To compile this driver as a module, choose M here: the module will be called veml6030. +config VEML6031X00 + tristate "VEML6031X00 ambient light sensor series" + select REGMAP_I2C + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + depends on I2C + help + Say Y here if you want to build a driver for the Vishay VEML6031X00 + ambient light sensor series. + + To compile this driver as a module, choose M here: the + module will be called veml6031x00. + config VEML6040 tristate "VEML6040 RGBW light sensor" select REGMAP_I2C diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile index f14a37442712..eca7a310bd54 100644 --- a/drivers/iio/light/Makefile +++ b/drivers/iio/light/Makefile @@ -64,6 +64,7 @@ obj-$(CONFIG_VCNL4000) += vcnl4000.o obj-$(CONFIG_VCNL4035) += vcnl4035.o obj-$(CONFIG_VEML3235) += veml3235.o obj-$(CONFIG_VEML6030) += veml6030.o +obj-$(CONFIG_VEML6031X00) += veml6031x00.o obj-$(CONFIG_VEML6040) += veml6040.o obj-$(CONFIG_VEML6070) += veml6070.o obj-$(CONFIG_VEML6075) += veml6075.o diff --git a/drivers/iio/light/veml6031x00.c b/drivers/iio/light/veml6031x00.c new file mode 100644 index 000000000000..fd4c111db13f --- /dev/null +++ b/drivers/iio/light/veml6031x00.c @@ -0,0 +1,1129 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * VEML6031X00 Ambient Light Sensor + * + * Copyright (c) 2024, Javier Carrasco + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Device registers */ +#define VEML6031X00_REG_CONF0 0x00 +#define VEML6031X00_REG_CONF1 0x01 +#define VEML6031X00_REG_WH_L 0x04 +#define VEML6031X00_REG_WH_H 0x05 +#define VEML6031X00_REG_WL_L 0x06 +#define VEML6031X00_REG_WL_H 0x07 +#define VEML6031X00_REG_ALS_L 0x10 +#define VEML6031X00_REG_ALS_H 0x11 +#define VEML6031X00_REG_IR_L 0x12 +#define VEML6031X00_REG_IR_H 0x13 +#define VEML6031X00_REG_ID_L 0x14 +#define VEML6031X00_REG_ID_H 0x15 +#define VEML6031X00_REG_INT 0x17 +#define VEML6031X00_REG_DATA(ch) (VEML6031X00_REG_ALS_L + (ch)) + +/* Bit masks for specific functionality */ +#define VEML6031X00_ALL_CH_MASK GENMASK(1, 0) +#define VEML6031X00_CONF0_SD BIT(0) +#define VEML6031X00_CONF0_AF_TRIG BIT(2) +#define VEML6031X00_CONF0_AF BIT(3) +#define VEML6031X00_CONF1_GAIN GENMASK(4, 3) +#define VEML6031X00_CONF1_PD_D4 BIT(6) +#define VEML6031X00_CONF1_IR_SD BIT(7) +#define VEML6031X00_INT_MASK GENMASK(3, 1) +#define VEML6031X00_INT_TH_H BIT(1) +#define VEML6031X00_INT_TH_L BIT(2) +#define VEML6031X00_INT_DRDY BIT(3) + +/* Autosuspend delay */ +#define VEML6031X00_AUTOSUSPEND_MS 2000 + +enum veml6031x00_scan { + VEML6031X00_SCAN_ALS, + VEML6031X00_SCAN_IR, + VEML6031X00_SCAN_TIMESTAMP, +}; + +struct veml6031x00_rf { + struct regmap_field *int_en; + struct regmap_field *it; + struct regmap_field *pers; +}; + +struct veml6031x00_chip { + const char *name; + const int part_id; +}; + +struct veml6031x00_data { + struct device *dev; + struct regmap *regmap; + struct iio_trigger *trig; + struct veml6031x00_rf rf; + const struct veml6031x00_chip *chip; + /* serialize access to irq enable/disable by events and trigger */ + struct mutex lock; + atomic_t int_users; + bool ev_en; + bool trig_en; +}; + +static const int veml6031x00_it[][2] = { + {0, 3125}, + {0, 6250}, + {0, 12500}, + {0, 25000}, + {0, 50000}, + {0, 100000}, + {0, 200000}, + {0, 400000}, +}; + +static const int veml6031x00_gains[][2] = { + {0, 125000}, + {0, 165000}, + {0, 250000}, + {0, 500000}, + {0, 660000}, + {1, 0}, + {2, 0}, +}; + +/* + * Persistence = 1/2/4/8 x integration time + * Minimum time for which light readings must stay above configured + * threshold to assert the interrupt. + */ +static const char * const period_values[] = { + "0.003125 0.00625 0.0125 0.025", + "0.00625 0.0125 0.025 0.05", + "0.0125 0.025 0.05 0.1", + "0.025 0.050 0.1 0.2", + "0.05 0.1 0.2 0.4", + "0.1 0.2 0.4 0.8", + "0.2 0.4 0.8 1.6", + "0.4 0.8 1.6 3.2" +}; + +/* + * Return list of valid period values in seconds corresponding to + * the currently active integration time. + */ +static ssize_t in_illuminance_period_available_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct veml6031x00_data *data = iio_priv(dev_to_iio_dev(dev)); + int ret, reg; + + ret = regmap_field_read(data->rf.it, ®); + if (ret) + return ret; + + if (reg < 0 || reg >= ARRAY_SIZE(period_values)) + return -EINVAL; + + return sysfs_emit(buf, "%s\n", period_values[reg]); +} + +static IIO_DEVICE_ATTR_RO(in_illuminance_period_available, 0); + +static struct attribute *veml6031x00_event_attributes[] = { + &iio_dev_attr_in_illuminance_period_available.dev_attr.attr, + NULL +}; + +static const struct attribute_group veml6031x00_event_attr_group = { + .attrs = veml6031x00_event_attributes, +}; + +/* + * Two shutdown bits (SD and ALS_IR_SD) must be cleared to power on + * the device. + */ +static int veml6031x00_als_power_on(struct veml6031x00_data *data) +{ + int ret; + + ret = regmap_clear_bits(data->regmap, VEML6031X00_REG_CONF0, + VEML6031X00_CONF0_SD); + if (ret) + return ret; + + ret = regmap_clear_bits(data->regmap, VEML6031X00_REG_CONF1, + VEML6031X00_CONF1_IR_SD); + if (ret) + return ret; + + return 0; +} + +/* + * Two shutdown bits (SD and ALS_IR_SD) must be set to power off + * the device. + */ +static int veml6031x00_als_sd(struct veml6031x00_data *data) +{ + int ret; + + ret = regmap_set_bits(data->regmap, VEML6031X00_REG_CONF0, + VEML6031X00_CONF0_SD); + if (ret) { + dev_err(data->dev, "Failed to set SD bit %d\n", ret); + return ret; + } + + return regmap_set_bits(data->regmap, VEML6031X00_REG_CONF1, + VEML6031X00_CONF1_IR_SD); +} + +static void veml6031x00_als_sd_action(void *data) +{ + veml6031x00_als_sd(data); +} + +static const struct iio_event_spec veml6031x00_event_spec[] = { + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_VALUE), + }, { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_FALLING, + .mask_separate = BIT(IIO_EV_INFO_VALUE), + }, { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_EITHER, + .mask_separate = BIT(IIO_EV_INFO_PERIOD) | + BIT(IIO_EV_INFO_ENABLE), + }, +}; + +static const struct iio_chan_spec veml6031x00_channels[] = { + { + .type = IIO_LIGHT, + .address = VEML6031X00_REG_ALS_L, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_SCALE), + .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_SCALE), + .event_spec = veml6031x00_event_spec, + .num_event_specs = ARRAY_SIZE(veml6031x00_event_spec), + .scan_index = VEML6031X00_SCAN_ALS, + .scan_type = { + .sign = 'u', + .realbits = 16, + .storagebits = 16, + .endianness = IIO_LE, + }, + }, + { + .type = IIO_INTENSITY, + .address = VEML6031X00_REG_IR_L, + .modified = 1, + .channel2 = IIO_MOD_LIGHT_IR, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_SCALE), + .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_SCALE), + .scan_index = VEML6031X00_SCAN_IR, + .scan_type = { + .sign = 'u', + .realbits = 16, + .storagebits = 16, + .endianness = IIO_LE, + }, + }, + IIO_CHAN_SOFT_TIMESTAMP(VEML6031X00_SCAN_TIMESTAMP), +}; + +static const struct regmap_config veml6031x00_regmap_config = { + .name = "veml6031x00_regmap", + .reg_bits = 8, + .val_bits = 8, + .max_register = VEML6031X00_REG_INT, +}; + +static const struct reg_field veml6031x00_rf_int_en = + REG_FIELD(VEML6031X00_REG_CONF0, 1, 1); + +static const struct reg_field veml6031x00_rf_it = + REG_FIELD(VEML6031X00_REG_CONF0, 4, 6); + +static const struct reg_field veml6031x00_rf_pers = + REG_FIELD(VEML6031X00_REG_CONF1, 1, 2); + +static int veml6031x00_regfield_init(struct veml6031x00_data *data) +{ + struct regmap *regmap = data->regmap; + struct device *dev = data->dev; + struct regmap_field *rm_field; + struct veml6031x00_rf *rf = &data->rf; + + rm_field = devm_regmap_field_alloc(dev, regmap, veml6031x00_rf_int_en); + if (IS_ERR(rm_field)) + return PTR_ERR(rm_field); + rf->int_en = rm_field; + + rm_field = devm_regmap_field_alloc(dev, regmap, veml6031x00_rf_it); + if (IS_ERR(rm_field)) + return PTR_ERR(rm_field); + rf->it = rm_field; + + rm_field = devm_regmap_field_alloc(dev, regmap, veml6031x00_rf_pers); + if (IS_ERR(rm_field)) + return PTR_ERR(rm_field); + rf->pers = rm_field; + + return 0; +} + +static int veml6031x00_get_it_usec(struct veml6031x00_data *data, int *it_usec) +{ + int ret, reg; + + ret = regmap_field_read(data->rf.it, ®); + if (ret) + return ret; + + switch (reg) { + case 0: + *it_usec = 3125; + break; + case 1: + *it_usec = 6250; + break; + case 2: + *it_usec = 12500; + break; + case 3: + *it_usec = 25000; + break; + case 4: + *it_usec = 50000; + break; + case 5: + *it_usec = 100000; + break; + case 6: + *it_usec = 200000; + break; + case 7: + *it_usec = 400000; + break; + default: + return -EINVAL; + } + + return IIO_VAL_INT_PLUS_MICRO; +} + +static int veml6031x00_set_it(struct iio_dev *iio, int val, int val2) +{ + struct veml6031x00_data *data = iio_priv(iio); + int ret, new_it; + + if (val) + return -EINVAL; + + switch (val2) { + case 3125: + new_it = 0x00; + break; + case 6250: + new_it = 0x01; + break; + case 12500: + new_it = 0x02; + break; + case 25000: + new_it = 0x03; + break; + case 50000: + new_it = 0x04; + break; + case 100000: + new_it = 0x05; + break; + case 200000: + new_it = 0x06; + break; + case 400000: + new_it = 0x07; + break; + default: + return -EINVAL; + } + + ret = regmap_field_write(data->rf.it, new_it); + if (ret) + return ret; + + return 0; +} + +static int veml6031x00_read_pers(struct iio_dev *iio, int *val, int *val2) +{ + struct veml6031x00_data *data = iio_priv(iio); + int ret, reg, period, it_usec; + + ret = veml6031x00_get_it_usec(data, &it_usec); + if (ret < 0) + return ret; + + ret = regmap_field_read(data->rf.pers, ®); + if (ret) + return ret; + + /* integration time multiplied by 1/2/4/8 */ + period = it_usec * (1 << reg); + + *val = period / MICRO; + *val2 = period % MICRO; + + return IIO_VAL_INT_PLUS_MICRO; +} + +static int veml6031x00_write_pers(struct iio_dev *iio, int val, int val2) +{ + struct veml6031x00_data *data = iio_priv(iio); + int ret, period, it_usec; + + ret = veml6031x00_get_it_usec(data, &it_usec); + if (ret < 0) + return ret; + + period = (val * MICRO + val2) / it_usec; + + if (period > 8 || hweight8(period) != 1) + return -EINVAL; + + return regmap_field_write(data->rf.pers, ffs(period) - 1); +} + +static int veml6031x00_set_scale(struct iio_dev *iio, int val, int val2) +{ + struct veml6031x00_data *data = iio_priv(iio); + int new_scale, gain_idx; + + if (val == 0 && val2 == 125000) { + new_scale = FIELD_PREP(VEML6031X00_CONF1_GAIN, 0x03) | + VEML6031X00_CONF1_PD_D4; + gain_idx = 0; + } else if (val == 0 && val2 == 165000) { + new_scale = FIELD_PREP(VEML6031X00_CONF1_GAIN, 0x02) | + VEML6031X00_CONF1_PD_D4; + gain_idx = 1; + } else if (val == 0 && val2 == 250000) { + new_scale = FIELD_PREP(VEML6031X00_CONF1_GAIN, 0x00) | + VEML6031X00_CONF1_PD_D4; + gain_idx = 2; + } else if (val == 0 && val2 == 500000) { + new_scale = FIELD_PREP(VEML6031X00_CONF1_GAIN, 0x03); + gain_idx = 3; + } else if (val == 0 && val2 == 660000) { + new_scale = FIELD_PREP(VEML6031X00_CONF1_GAIN, 0x02); + gain_idx = 4; + } else if (val == 1 && val2 == 0) { + new_scale = FIELD_PREP(VEML6031X00_CONF1_GAIN, 0x00); + gain_idx = 5; + } else if (val == 2 && val2 == 0) { + new_scale = FIELD_PREP(VEML6031X00_CONF1_GAIN, 0x01); + gain_idx = 6; + } else { + return -EINVAL; + } + + return regmap_update_bits(data->regmap, VEML6031X00_REG_CONF1, + VEML6031X00_CONF1_GAIN | + VEML6031X00_CONF1_PD_D4, + new_scale); +} + +static int veml6031x00_get_scale(struct veml6031x00_data *data, + int *val, int *val2) +{ + int ret, reg; + + ret = regmap_read(data->regmap, VEML6031X00_REG_CONF1, ®); + if (ret) + return ret; + + switch (FIELD_GET(VEML6031X00_CONF1_GAIN, reg)) { + case 0: + *val = 1; + *val2 = 0; + break; + case 1: + *val = 2; + *val2 = 0; + break; + case 2: + *val = 0; + *val2 = 660000; + break; + case 3: + *val = 0; + *val2 = 500000; + break; + default: + return -EINVAL; + } + + if (reg & VEML6031X00_CONF1_PD_D4) + *val2 /= 4; + + return IIO_VAL_INT_PLUS_MICRO; +} + +static int veml6031x00_read_th(struct iio_dev *iio, int *val, int *val2, int dir) +{ + struct veml6031x00_data *data = iio_priv(iio); + __le16 reg; + int ret; + + if (dir == IIO_EV_DIR_RISING) + ret = regmap_bulk_read(data->regmap, VEML6031X00_REG_WH_L, + ®, 2); + else + ret = regmap_bulk_read(data->regmap, VEML6031X00_REG_WL_L, + ®, 2); + if (ret) + return ret; + + *val = le16_to_cpu(reg); + + return IIO_VAL_INT; +} + +static int veml6031x00_write_th(struct iio_dev *iio, int val, int val2, int dir) +{ + struct veml6031x00_data *data = iio_priv(iio); + struct device *dev = data->dev; + int ret; + + if (val < 0 || val > U16_MAX || val2) + return -EINVAL; + + if (dir == IIO_EV_DIR_RISING) { + ret = regmap_bulk_write(data->regmap, VEML6031X00_REG_WH_L, + &val, 2); + if (ret) + dev_dbg(dev, "Failed to set high threshold %d\n", ret); + } else { + ret = regmap_bulk_write(data->regmap, VEML6031X00_REG_WL_L, + &val, 2); + if (ret) + dev_dbg(dev, "Failed to set low threshold %d\n", ret); + } + + return ret; +} + +static int veml6031x00_single_read(struct iio_dev *iio, enum iio_chan_type type, + int *val) +{ + struct veml6031x00_data *data = iio_priv(iio); + int addr, it_usec, ret; + __le16 reg; + + switch (type) { + case IIO_LIGHT: + addr = VEML6031X00_REG_ALS_L; + break; + case IIO_INTENSITY: + addr = VEML6031X00_REG_IR_L; + break; + default: + return -EINVAL; + } + ret = pm_runtime_resume_and_get(data->dev); + if (ret) + return ret; + + ret = veml6031x00_get_it_usec(data, &it_usec); + if (ret < 0) + return ret; + + /* integration time + 10 % to ensure completion */ + fsleep(it_usec + (it_usec / 10)); + + iio_device_claim_direct_scoped(return -EBUSY, iio) { + ret = regmap_bulk_read(data->regmap, addr, ®, 2); + if (ret < 0) + return ret; + } + pm_runtime_mark_last_busy(data->dev); + pm_runtime_put_autosuspend(data->dev); + + *val = le16_to_cpu(reg); + + return IIO_VAL_INT; +} + +static int veml6031x00_read_raw(struct iio_dev *iio, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + struct veml6031x00_data *data = iio_priv(iio); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + return veml6031x00_single_read(iio, chan->type, val); + case IIO_CHAN_INFO_INT_TIME: + *val = 0; + return veml6031x00_get_it_usec(data, val2); + case IIO_CHAN_INFO_SCALE: + return veml6031x00_get_scale(data, val, val2); + default: + return -EINVAL; + } +} + +static int veml6031x00_read_avail(struct iio_dev *iio, + struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, + long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_INT_TIME: + *vals = (int *)&veml6031x00_it; + *length = 2 * ARRAY_SIZE(veml6031x00_it); + *type = IIO_VAL_INT_PLUS_MICRO; + return IIO_AVAIL_LIST; + case IIO_CHAN_INFO_SCALE: + *vals = (int *)&veml6031x00_gains; + *length = 2 * ARRAY_SIZE(veml6031x00_gains); + *type = IIO_VAL_INT_PLUS_MICRO; + return IIO_AVAIL_LIST; + default: + return -EINVAL; + } +} + +static int veml6031x00_write_raw(struct iio_dev *iio, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_INT_TIME: + return veml6031x00_set_it(iio, val, val2); + case IIO_CHAN_INFO_SCALE: + return veml6031x00_set_scale(iio, val, val2); + default: + return -EINVAL; + } +} + +static int veml6031x00_set_interrupt(struct veml6031x00_data *data, bool state) +{ + if (state) { + if (atomic_inc_return(&data->int_users) > 1) + return 0; + } else { + if (atomic_dec_return(&data->int_users) > 0) + return 0; + } + + return regmap_field_write(data->rf.int_en, state); +} + +static int veml6031x00_read_event_val(struct iio_dev *iio, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int *val, int *val2) +{ + switch (info) { + case IIO_EV_INFO_VALUE: + switch (dir) { + case IIO_EV_DIR_RISING: + case IIO_EV_DIR_FALLING: + return veml6031x00_read_th(iio, val, val2, dir); + default: + return -EINVAL; + } + break; + case IIO_EV_INFO_PERIOD: + return veml6031x00_read_pers(iio, val, val2); + default: + return -EINVAL; + } +} + +static int veml6031x00_write_event_val(struct iio_dev *iio, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int val, int val2) +{ + switch (info) { + case IIO_EV_INFO_VALUE: + return veml6031x00_write_th(iio, val, val2, dir); + case IIO_EV_INFO_PERIOD: + return veml6031x00_write_pers(iio, val, val2); + default: + return -EINVAL; + } +} + +static int veml6031x00_read_event_config(struct iio_dev *iio, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) +{ + struct veml6031x00_data *data = iio_priv(iio); + + guard(mutex)(&data->lock); + + return data->ev_en; +} + +static int veml6031x00_write_event_config(struct iio_dev *iio, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + bool state) +{ + struct veml6031x00_data *data = iio_priv(iio); + int ret; + + scoped_guard(mutex, &data->lock) { + /* avoid multiple increments/decrements from one source */ + if (state == data->ev_en) + return 0; + + ret = veml6031x00_set_interrupt(data, state); + if (ret) + return ret; + + data->ev_en = state; + } + + if (state) + return pm_runtime_resume_and_get(data->dev); + + pm_runtime_mark_last_busy(data->dev); + pm_runtime_put_autosuspend(data->dev); + + return 0; +} + +static const struct iio_info veml6031x00_info = { + .read_raw = veml6031x00_read_raw, + .read_avail = veml6031x00_read_avail, + .write_raw = veml6031x00_write_raw, + .read_event_value = veml6031x00_read_event_val, + .write_event_value = veml6031x00_write_event_val, + .read_event_config = veml6031x00_read_event_config, + .write_event_config = veml6031x00_write_event_config, + .event_attrs = &veml6031x00_event_attr_group, +}; + +static const struct iio_info veml6031x00_info_no_irq = { + .read_raw = veml6031x00_read_raw, + .read_avail = veml6031x00_read_avail, + .write_raw = veml6031x00_write_raw, +}; + +static irqreturn_t veml6031x00_interrupt(int irq, void *private) +{ + struct iio_dev *iio = private; + struct veml6031x00_data *data = iio_priv(iio); + int ret, reg; + + ret = regmap_read(data->regmap, VEML6031X00_REG_INT, ®); + if (ret) { + dev_err(data->dev, + "Failed to read interrupt register %d\n", ret); + return IRQ_NONE; + } + + if (!(reg & VEML6031X00_INT_MASK)) + return IRQ_NONE; + + guard(mutex)(&data->lock); + + if ((reg & VEML6031X00_INT_TH_H) && data->ev_en) { + iio_push_event(iio, IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING), + iio_get_time_ns(iio)); + } + + if ((reg & VEML6031X00_INT_TH_L) && data->ev_en) { + iio_push_event(iio, IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_FALLING), + iio_get_time_ns(iio)); + } + + if ((reg & VEML6031X00_INT_DRDY) && data->trig_en) { + iio_trigger_poll_nested(data->trig); + ret = regmap_set_bits(data->regmap, VEML6031X00_REG_CONF0, + VEML6031X00_CONF0_AF_TRIG); + if (ret) + dev_err(data->dev, "Failed to set trigger %d\n", ret); + } + + return IRQ_HANDLED; +} + +static int veml6031x00_buffer_preenable(struct iio_dev *iio) +{ + struct veml6031x00_data *data = iio_priv(iio); + struct device *dev = data->dev; + + return pm_runtime_resume_and_get(dev); +} + +static int veml6031x00_buffer_postdisable(struct iio_dev *iio) +{ + struct veml6031x00_data *data = iio_priv(iio); + struct device *dev = data->dev; + + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + return 0; +} + +static int veml6031x00_set_trigger_state(struct iio_trigger *trig, bool state) +{ + struct iio_dev *iio = iio_trigger_get_drvdata(trig); + struct veml6031x00_data *data = iio_priv(iio); + int ret; + + scoped_guard(mutex, &data->lock) { + /* avoid multiple increments/decrements from one source */ + if (state == data->trig_en) + return 0; + + ret = veml6031x00_set_interrupt(data, state); + if (ret) + return ret; + + data->trig_en = state; + } + + /* The AF bit must be set before setting AF_TRIG */ + ret = regmap_update_bits(data->regmap, VEML6031X00_REG_CONF0, + VEML6031X00_CONF0_AF, + FIELD_PREP(VEML6031X00_CONF0_AF, state)); + if (ret) + return ret; + + return regmap_update_bits(data->regmap, VEML6031X00_REG_CONF0, + VEML6031X00_CONF0_AF_TRIG, + FIELD_PREP(VEML6031X00_CONF0_AF_TRIG, state)); +} + +static const struct iio_buffer_setup_ops veml6031x00_buffer_setup_ops = { + .preenable = veml6031x00_buffer_preenable, + .postdisable = veml6031x00_buffer_postdisable, +}; + +static const struct iio_trigger_ops veml6031x00_trigger_ops = { + .set_trigger_state = veml6031x00_set_trigger_state, +}; + +static irqreturn_t veml6031x00_trig_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *iio = pf->indio_dev; + struct veml6031x00_data *data = iio_priv(iio); + int ch, ret, i = 0; + __le16 reg; + struct { + __le16 chans[2]; + aligned_s64 timestamp; + } scan; + + memset(&scan, 0, sizeof(scan)); + + if (*iio->active_scan_mask == VEML6031X00_ALL_CH_MASK) { + ret = regmap_bulk_read(data->regmap, + VEML6031X00_REG_ALS_L, + ®, sizeof(scan.chans)); + if (ret) + goto done; + } else { + iio_for_each_active_channel(iio, ch) { + ret = regmap_bulk_read(data->regmap, + VEML6031X00_REG_DATA(ch), + &scan.chans[i++], 2); + if (ret) + goto done; + } + } + + iio_push_to_buffers_with_timestamp(iio, &scan, pf->timestamp); + +done: + iio_trigger_notify_done(iio->trig); + + return IRQ_HANDLED; +} + +static void veml6031x00_validate_part_id(struct veml6031x00_data *data) +{ + int part_id, ret; + __le16 reg; + + ret = regmap_bulk_read(data->regmap, VEML6031X00_REG_ID_L, ®, 2); + if (ret) { + dev_info(data->dev, "Failed to read ID\n"); + return; + } + + part_id = le16_to_cpu(reg); + if (part_id != data->chip->part_id) + dev_info(data->dev, "Unknown ID %#02x\n", part_id); +} + +static int veml6031x00_hw_init(struct iio_dev *iio) +{ + struct veml6031x00_data *data = iio_priv(iio); + struct device *dev = data->dev; + int ret, val; + __le16 reg; + + reg = cpu_to_le16(0); + ret = regmap_bulk_write(data->regmap, VEML6031X00_REG_WL_L, ®, 2); + if (ret) + return dev_err_probe(dev, ret, "Failed to set low threshold\n"); + + reg = cpu_to_le16(U16_MAX); + ret = regmap_bulk_write(data->regmap, VEML6031X00_REG_WH_L, ®, 2); + if (ret) + return dev_err_probe(dev, ret, "Failed to set high threshold\n"); + + ret = regmap_field_write(data->rf.int_en, 0); + if (ret < 0) + return ret; + + ret = regmap_read(data->regmap, VEML6031X00_REG_INT, &val); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to clear interrupts\n"); + + return 0; +} + +static int veml6031x00_setup_irq(struct i2c_client *i2c, struct iio_dev *iio) +{ + struct veml6031x00_data *data = iio_priv(iio); + struct device *dev = data->dev; + int ret; + + data->trig = devm_iio_trigger_alloc(dev, "%s-drdy%d", iio->name, + iio_device_id(iio)); + if (!data->trig) + return -ENOMEM; + + data->trig->ops = &veml6031x00_trigger_ops; + iio_trigger_set_drvdata(data->trig, iio); + + ret = devm_iio_trigger_register(dev, data->trig); + if (ret) + return ret; + + iio->trig = iio_trigger_get(data->trig); + ret = devm_request_threaded_irq(dev, i2c->irq, NULL, + veml6031x00_interrupt, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + iio->name, iio); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to request irq %d\n", + i2c->irq); + + iio->info = &veml6031x00_info; + + return 0; +} + +static int veml6031x00_probe(struct i2c_client *i2c) +{ + struct device *dev = &i2c->dev; + struct veml6031x00_data *data; + struct iio_dev *iio; + struct regmap *regmap; + int ret; + + regmap = devm_regmap_init_i2c(i2c, &veml6031x00_regmap_config); + if (IS_ERR(regmap)) + return dev_err_probe(dev, PTR_ERR(regmap), + "Failed to set regmap\n"); + + iio = devm_iio_device_alloc(dev, sizeof(*data)); + if (!iio) + return -ENOMEM; + + data = iio_priv(iio); + i2c_set_clientdata(i2c, iio); + data->dev = dev; + data->regmap = regmap; + + mutex_init(&data->lock); + + ret = veml6031x00_regfield_init(data); + if (ret) + return dev_err_probe(dev, ret, "Failed to init regfield\n"); + + ret = devm_regulator_get_enable(dev, "vdd"); + if (ret) + return dev_err_probe(dev, ret, "Failed to enable regulator\n"); + + data->chip = i2c_get_match_data(i2c); + if (!data->chip) + return dev_err_probe(dev, -EINVAL, "Failed to get chip data\n"); + + ret = devm_add_action_or_reset(dev, veml6031x00_als_sd_action, data); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to add shut down action\n"); + + ret = pm_runtime_set_active(dev); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to activate PM runtime\n"); + + ret = devm_pm_runtime_enable(dev); + if (ret) + return dev_err_probe(dev, ret, "Failed to enable PM runtime\n"); + + pm_runtime_get_noresume(dev); + pm_runtime_set_autosuspend_delay(dev, VEML6031X00_AUTOSUSPEND_MS); + pm_runtime_use_autosuspend(dev); + + veml6031x00_validate_part_id(data); + + iio->name = data->chip->name; + iio->channels = veml6031x00_channels; + iio->num_channels = ARRAY_SIZE(veml6031x00_channels); + iio->modes = INDIO_DIRECT_MODE; + + if (i2c->irq) { + ret = veml6031x00_setup_irq(i2c, iio); + if (ret < 0) + return ret; + } else { + iio->info = &veml6031x00_info_no_irq; + } + + ret = veml6031x00_hw_init(iio); + if (ret < 0) + return ret; + + ret = devm_iio_triggered_buffer_setup(dev, iio, NULL, + veml6031x00_trig_handler, + &veml6031x00_buffer_setup_ops); + if (ret) + return dev_err_probe(dev, ret, + "Failed to register triggered buffer"); + + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + ret = devm_iio_device_register(dev, iio); + if (ret) + return dev_err_probe(dev, ret, "Failed to register iio device"); + + return 0; +} + +static int veml6031x00_runtime_suspend(struct device *dev) +{ + struct veml6031x00_data *data = iio_priv(dev_get_drvdata(dev)); + + return veml6031x00_als_sd(data); +} + +static int veml6031x00_runtime_resume(struct device *dev) +{ + struct veml6031x00_data *data = iio_priv(dev_get_drvdata(dev)); + + return veml6031x00_als_power_on(data); +} + +static DEFINE_RUNTIME_DEV_PM_OPS(veml6031x00_pm_ops, veml6031x00_runtime_suspend, + veml6031x00_runtime_resume, NULL); + +static const struct veml6031x00_chip veml6031x00_chip = { + .name = "veml6031x00", + .part_id = 0x0001, +}; + +static const struct veml6031x00_chip veml6031x01_chip = { + .name = "veml6031x01", + .part_id = 0x0001, +}; + +static const struct veml6031x00_chip veml60311x00_chip = { + .name = "veml60311x00", + .part_id = 0x1001, +}; + +static const struct veml6031x00_chip veml60311x01_chip = { + .name = "veml60311x01", + .part_id = 0x1001, +}; + +static const struct of_device_id veml6031x00_of_match[] = { + { + .compatible = "vishay,veml6031x00", + .data = &veml6031x00_chip, + }, + { + .compatible = "vishay,veml6031x01", + .data = &veml6031x01_chip, + }, + { + .compatible = "vishay,veml60311x00", + .data = &veml60311x00_chip, + }, + { + .compatible = "vishay,veml60311x01", + .data = &veml60311x01_chip, + }, + { } +}; +MODULE_DEVICE_TABLE(of, veml6031x00_of_match); + +static const struct i2c_device_id veml6031x00_id[] = { + { "veml6031x00", (kernel_ulong_t)&veml6031x00_chip }, + { "veml6031x01", (kernel_ulong_t)&veml6031x01_chip }, + { "veml60311x00", (kernel_ulong_t)&veml60311x00_chip }, + { "veml60311x01", (kernel_ulong_t)&veml60311x01_chip }, + { } +}; +MODULE_DEVICE_TABLE(i2c, veml6031x00_id); + +static struct i2c_driver veml6031x00_driver = { + .driver = { + .name = "veml6031x00", + .of_match_table = veml6031x00_of_match, + .pm = pm_ptr(&veml6031x00_pm_ops), + }, + .probe = veml6031x00_probe, + .id_table = veml6031x00_id, +}; +module_i2c_driver(veml6031x00_driver); + +MODULE_AUTHOR("Javier Carrasco "); +MODULE_DESCRIPTION("VEML6031X00 Ambient Light Sensor"); +MODULE_LICENSE("GPL");