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X-OriginatorOrg: axis.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Oct 2024 12:23:04.5470 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1aed882e-df96-4ffd-47db-08dce3a62183 X-MS-Exchange-CrossTenant-Id: 78703d3c-b907-432f-b066-88f7af9ca3af X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=78703d3c-b907-432f-b066-88f7af9ca3af;Ip=[195.60.68.100];Helo=[mail.axis.com] X-MS-Exchange-CrossTenant-AuthSource: DB3PEPF00008859.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: GV2PR02MB8673 The opt3002 is a Light-to-Digital Sensor by TI with support for wide-range spectrum light. It shares most properties with their opt3001 model with the exception of having a wide spectral bandwidth, ranging from 300 nm to 1000 nm. Add the compatible string of opt3002. Acked-by: Conor Dooley Signed-off-by: Emil Gedenryd --- Documentation/devicetree/bindings/iio/light/ti,opt3001.yaml | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/iio/light/ti,opt3001.yaml b/Documentation/devicetree/bindings/iio/light/ti,opt3001.yaml index 441e9343fc97..67ca8d08256a 100644 --- a/Documentation/devicetree/bindings/iio/light/ti,opt3001.yaml +++ b/Documentation/devicetree/bindings/iio/light/ti,opt3001.yaml @@ -15,7 +15,9 @@ description: | properties: compatible: - const: ti,opt3001 + enum: + - ti,opt3001 + - ti,opt3002 reg: maxItems: 1 From patchwork Thu Oct 3 12:22:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Emil Gedenryd X-Patchwork-Id: 13820980 Received: from EUR05-VI1-obe.outbound.protection.outlook.com (mail-vi1eur05on2055.outbound.protection.outlook.com [40.107.21.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 58B951547FB; 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X-OriginatorOrg: axis.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Oct 2024 12:23:04.5135 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 08ad6d9f-dbdc-40c2-298c-08dce3a6217e X-MS-Exchange-CrossTenant-Id: 78703d3c-b907-432f-b066-88f7af9ca3af X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=78703d3c-b907-432f-b066-88f7af9ca3af;Ip=[195.60.68.100];Helo=[mail.axis.com] X-MS-Exchange-CrossTenant-AuthSource: DU6PEPF0000A7E3.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU2PR02MB10230 TI's opt3002 light sensor shares most properties with the opt3001 model, with the exception of supporting a wider spectrum range. Add support for TI's opt3002 by extending the TI opt3001 driver. Datasheet: https://www.ti.com/product/OPT3002 Signed-off-by: Emil Gedenryd --- drivers/iio/light/Kconfig | 2 +- drivers/iio/light/opt3001.c | 189 ++++++++++++++++++++++++++++++++++++-------- 2 files changed, 157 insertions(+), 34 deletions(-) diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index b68dcc1fbaca..c35bf962dae6 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -461,7 +461,7 @@ config OPT3001 depends on I2C help If you say Y or M here, you get support for Texas Instruments - OPT3001 Ambient Light Sensor. + OPT3001 Ambient Light Sensor, OPT3002 Light-to-Digital Sensor. If built as a dynamically linked module, it will be called opt3001. diff --git a/drivers/iio/light/opt3001.c b/drivers/iio/light/opt3001.c index 176e54bb48c3..ff7fc0d4b08f 100644 --- a/drivers/iio/light/opt3001.c +++ b/drivers/iio/light/opt3001.c @@ -70,6 +70,35 @@ #define OPT3001_RESULT_READY_SHORT 150 #define OPT3001_RESULT_READY_LONG 1000 +struct opt3001_scale { + int val; + int val2; +}; + +struct opt3001_chip_info { + const struct iio_chan_spec (*channels)[2]; + enum iio_chan_type chan_type; + int num_channels; + + const struct opt3001_scale (*scales)[12]; + /* + * Factor as specified by conversion equation in datasheet. + * eg. 0.01 (scaled to integer 10) for opt3001. + */ + int factor_whole; + /* + * Factor to compensate for potentially scaled factor_whole. + */ + int factor_integer; + /* + * Factor used to align decimal part of proccessed value to six decimal + * places. + */ + int factor_decimal; + + bool has_id; +}; + struct opt3001 { struct i2c_client *client; struct device *dev; @@ -79,6 +108,7 @@ struct opt3001 { bool result_ready; wait_queue_head_t result_ready_queue; u16 result; + const struct opt3001_chip_info *chip_info; u32 int_time; u32 mode; @@ -92,11 +122,6 @@ struct opt3001 { bool use_irq; }; -struct opt3001_scale { - int val; - int val2; -}; - static const struct opt3001_scale opt3001_scales[] = { { .val = 40, @@ -148,21 +173,68 @@ static const struct opt3001_scale opt3001_scales[] = { }, }; +static const struct opt3001_scale opt3002_scales[] = { + { + .val = 4914, + .val2 = 0, + }, + { + .val = 9828, + .val2 = 0, + }, + { + .val = 19656, + .val2 = 0, + }, + { + .val = 39312, + .val2 = 0, + }, + { + .val = 78624, + .val2 = 0, + }, + { + .val = 157248, + .val2 = 0, + }, + { + .val = 314496, + .val2 = 0, + }, + { + .val = 628992, + .val2 = 0, + }, + { + .val = 1257984, + .val2 = 0, + }, + { + .val = 2515968, + .val2 = 0, + }, + { + .val = 5031936, + .val2 = 0, + }, + { + .val = 10063872, + .val2 = 0, + }, +}; + static int opt3001_find_scale(const struct opt3001 *opt, int val, int val2, u8 *exponent) { int i; - - for (i = 0; i < ARRAY_SIZE(opt3001_scales); i++) { - const struct opt3001_scale *scale = &opt3001_scales[i]; - + for (i = 0; i < ARRAY_SIZE(*opt->chip_info->scales); i++) { + const struct opt3001_scale *scale = &(*opt->chip_info->scales)[i]; /* - * Combine the integer and micro parts for comparison - * purposes. Use milli lux precision to avoid 32-bit integer - * overflows. + * Compare the integer and micro parts to determine value scale. */ - if ((val * 1000 + val2 / 1000) <= - (scale->val * 1000 + scale->val2 / 1000)) { + if (val < scale->val || + (val == scale->val && val2 <= scale->val2)) { *exponent = i; return 0; } @@ -174,11 +246,14 @@ static int opt3001_find_scale(const struct opt3001 *opt, int val, static void opt3001_to_iio_ret(struct opt3001 *opt, u8 exponent, u16 mantissa, int *val, int *val2) { - int lux; + int ret; + int whole = opt->chip_info->factor_whole; + int integer = opt->chip_info->factor_integer; + int decimal = opt->chip_info->factor_decimal; - lux = 10 * (mantissa << exponent); - *val = lux / 1000; - *val2 = (lux - (*val * 1000)) * 1000; + ret = whole * (mantissa << exponent); + *val = ret / integer; + *val2 = (ret - (*val * integer)) * decimal; } static void opt3001_set_mode(struct opt3001 *opt, u16 *reg, u16 mode) @@ -225,7 +300,18 @@ static const struct iio_chan_spec opt3001_channels[] = { IIO_CHAN_SOFT_TIMESTAMP(1), }; -static int opt3001_get_lux(struct opt3001 *opt, int *val, int *val2) +static const struct iio_chan_spec opt3002_channels[] = { + { + .type = IIO_INTENSITY, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_INT_TIME), + .event_spec = opt3001_event_spec, + .num_event_specs = ARRAY_SIZE(opt3001_event_spec), + }, + IIO_CHAN_SOFT_TIMESTAMP(1), +}; + +static int opt3001_get_processed(struct opt3001 *opt, int *val, int *val2) { int ret; u16 mantissa; @@ -397,14 +483,15 @@ static int opt3001_read_raw(struct iio_dev *iio, if (opt->mode == OPT3001_CONFIGURATION_M_CONTINUOUS) return -EBUSY; - if (chan->type != IIO_LIGHT) + if (chan->type != opt->chip_info->chan_type) return -EINVAL; mutex_lock(&opt->lock); switch (mask) { + case IIO_CHAN_INFO_RAW: case IIO_CHAN_INFO_PROCESSED: - ret = opt3001_get_lux(opt, val, val2); + ret = opt3001_get_processed(opt, val, val2); break; case IIO_CHAN_INFO_INT_TIME: ret = opt3001_get_int_time(opt, val, val2); @@ -428,7 +515,7 @@ static int opt3001_write_raw(struct iio_dev *iio, if (opt->mode == OPT3001_CONFIGURATION_M_CONTINUOUS) return -EBUSY; - if (chan->type != IIO_LIGHT) + if (chan->type != opt->chip_info->chan_type) return -EINVAL; if (mask != IIO_CHAN_INFO_INT_TIME) @@ -479,6 +566,9 @@ static int opt3001_write_event_value(struct iio_dev *iio, { struct opt3001 *opt = iio_priv(iio); int ret; + int whole; + int integer; + int decimal; u16 mantissa; u16 value; @@ -497,7 +587,12 @@ static int opt3001_write_event_value(struct iio_dev *iio, goto err; } - mantissa = (((val * 1000) + (val2 / 1000)) / 10) >> exponent; + whole = opt->chip_info->factor_whole; + integer = opt->chip_info->factor_integer; + decimal = opt->chip_info->factor_decimal; + + mantissa = (((val * integer) + (val2 / decimal)) / whole) >> exponent; + value = (exponent << 12) | mantissa; switch (dir) { @@ -610,7 +705,7 @@ static int opt3001_read_id(struct opt3001 *opt) ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_DEVICE_ID); if (ret < 0) { dev_err(opt->dev, "failed to read register %02x\n", - OPT3001_DEVICE_ID); + OPT3001_DEVICE_ID); return ret; } @@ -692,6 +787,7 @@ static irqreturn_t opt3001_irq(int irq, void *_iio) struct opt3001 *opt = iio_priv(iio); int ret; bool wake_result_ready_queue = false; + enum iio_chan_type chan_type = opt->chip_info->chan_type; if (!opt->ok_to_ignore_lock) mutex_lock(&opt->lock); @@ -707,13 +803,13 @@ static irqreturn_t opt3001_irq(int irq, void *_iio) OPT3001_CONFIGURATION_M_CONTINUOUS) { if (ret & OPT3001_CONFIGURATION_FH) iio_push_event(iio, - IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0, + IIO_UNMOD_EVENT_CODE(chan_type, 0, IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), iio_get_time_ns(iio)); if (ret & OPT3001_CONFIGURATION_FL) iio_push_event(iio, - IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0, + IIO_UNMOD_EVENT_CODE(chan_type, 0, IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING), iio_get_time_ns(iio)); @@ -755,22 +851,25 @@ static int opt3001_probe(struct i2c_client *client) opt = iio_priv(iio); opt->client = client; opt->dev = dev; + opt->chip_info = i2c_get_match_data(client); mutex_init(&opt->lock); init_waitqueue_head(&opt->result_ready_queue); i2c_set_clientdata(client, iio); - ret = opt3001_read_id(opt); - if (ret) - return ret; + if (opt->chip_info->has_id) { + ret = opt3001_read_id(opt); + if (ret) + return ret; + } ret = opt3001_configure(opt); if (ret) return ret; iio->name = client->name; - iio->channels = opt3001_channels; - iio->num_channels = ARRAY_SIZE(opt3001_channels); + iio->channels = *opt->chip_info->channels; + iio->num_channels = opt->chip_info->num_channels; iio->modes = INDIO_DIRECT_MODE; iio->info = &opt3001_info; @@ -825,14 +924,38 @@ static void opt3001_remove(struct i2c_client *client) } } +static const struct opt3001_chip_info opt3001_chip_information = { + .channels = &opt3001_channels, + .chan_type = IIO_LIGHT, + .num_channels = ARRAY_SIZE(opt3001_channels), + .scales = &opt3001_scales, + .factor_whole = 10, + .factor_integer = 1000, + .factor_decimal = 1000, + .has_id = true, +}; + +static const struct opt3001_chip_info opt3002_chip_information = { + .channels = &opt3002_channels, + .chan_type = IIO_INTENSITY, + .num_channels = ARRAY_SIZE(opt3002_channels), + .scales = &opt3002_scales, + .factor_whole = 12, + .factor_integer = 10, + .factor_decimal = 100000, + .has_id = false, +}; + static const struct i2c_device_id opt3001_id[] = { - { "opt3001" }, + { "opt3001", (kernel_ulong_t)&opt3001_chip_information }, + { "opt3002", (kernel_ulong_t)&opt3002_chip_information }, { } /* Terminating Entry */ }; MODULE_DEVICE_TABLE(i2c, opt3001_id); static const struct of_device_id opt3001_of_match[] = { - { .compatible = "ti,opt3001" }, + { .compatible = "ti,opt3001", .data = &opt3001_chip_information }, + { .compatible = "ti,opt3002", .data = &opt3002_chip_information }, { } }; MODULE_DEVICE_TABLE(of, opt3001_of_match);