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Sun, 31 May 2026 12:58:38 -0700 (PDT) From: Javier Carrasco Date: Sun, 31 May 2026 21:58:23 +0200 Subject: [PATCH v4 3/4] iio: light: veml6031x00: add support for triggered buffers Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260531-veml6031x00-v4-3-e64f7fdce38d@gmail.com> References: <20260531-veml6031x00-v4-0-e64f7fdce38d@gmail.com> In-Reply-To: <20260531-veml6031x00-v4-0-e64f7fdce38d@gmail.com> To: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Rishi Gupta , David Lechner , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , Matti Vaittinen Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Javier Carrasco , Jonathan Cameron X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1780257511; l=5898; i=javier.carrasco.cruz@gmail.com; s=20260111; h=from:subject:message-id; bh=3rMinnWkSWj8Yetpk6Terpb21cTv9q5faLaxxlD4tao=; b=bgW5mAvM2uIi2Bcq0yv6vNGjRV1wg7bZm4RdzeK0rUdBHdL+FdE9xtXhDxSomsKi3t86TktKd LGzVW3WekG4A/VF4LqSyBfVgkJp5ArRIOUAPKr5C1wgUboW6s9BvkOZ X-Developer-Key: i=javier.carrasco.cruz@gmail.com; a=ed25519; pk=Lge8w8xidNSf/INy7JAIbAW+Hezkp3nsBh2OjKL7lLU= Add triggered buffer functionality for the two channels the device provides (ALS and IR). Signed-off-by: Javier Carrasco --- drivers/iio/light/Kconfig | 2 + drivers/iio/light/veml6031x00.c | 114 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 116 insertions(+) diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index 99a6ed80c7db..ff71de8454bd 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -717,6 +717,8 @@ config VEML6031X00 tristate "VEML6031X00 ambient light sensor series" select REGMAP_I2C select IIO_GTS_HELPER + 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 diff --git a/drivers/iio/light/veml6031x00.c b/drivers/iio/light/veml6031x00.c index 6f9a7bad44d4..facb1b8e4241 100644 --- a/drivers/iio/light/veml6031x00.c +++ b/drivers/iio/light/veml6031x00.c @@ -16,6 +16,8 @@ #include #include #include +#include +#include /* Device registers */ #define VEML6031X00_REG_CONF0 0x00 @@ -31,6 +33,12 @@ #define VEML6031X00_CONF0_SD BIT(0) #define VEML6031X00_CONF1_IR_SD BIT(7) +enum veml6031x00_scan { + VEML6031X00_SCAN_ALS, + VEML6031X00_SCAN_IR, + VEML6031X00_SCAN_TIMESTAMP, +}; + struct veml6031x00_rf { struct regmap_field *gain; struct regmap_field *it; @@ -136,6 +144,13 @@ static const struct iio_chan_spec veml6031x00_channels[] = { .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME), .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME), .info_mask_separate_available = BIT(IIO_CHAN_INFO_SCALE), + .scan_index = VEML6031X00_SCAN_ALS, + .scan_type = { + .sign = 'u', + .realbits = 16, + .storagebits = 16, + .endianness = IIO_LE, + }, }, { .type = IIO_INTENSITY, @@ -146,7 +161,15 @@ static const struct iio_chan_spec veml6031x00_channels[] = { 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), + .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_range veml6031x00_readable_ranges[] = { @@ -378,6 +401,10 @@ static int veml6031x00_single_read(struct iio_dev *iio, enum iio_chan_type type, return -EINVAL; } + IIO_DEV_ACQUIRE_DIRECT_MODE(iio, claim); + if (IIO_DEV_ACQUIRE_FAILED(claim)) + return -EBUSY; + PM_RUNTIME_ACQUIRE_AUTOSUSPEND(data->dev, pm); ret = PM_RUNTIME_ACQUIRE_ERR(&pm); if (ret) @@ -438,6 +465,10 @@ static int veml6031x00_write_raw(struct iio_dev *iio, struct iio_chan_spec const *chan, int val, int val2, long mask) { + IIO_DEV_ACQUIRE_DIRECT_MODE(iio, claim); + if (IIO_DEV_ACQUIRE_FAILED(claim)) + return -EBUSY; + switch (mask) { case IIO_CHAN_INFO_INT_TIME: return veml6031x00_set_it(iio, val, val2); @@ -469,6 +500,82 @@ static const struct iio_info veml6031x00_info = { .write_raw_get_fmt = veml6031x00_write_raw_get_fmt, }; +static int veml6031x00_buffer_preenable(struct iio_dev *iio) +{ + struct veml6031x00_data *data = iio_priv(iio); + int ret, it_usec; + + ret = pm_runtime_resume_and_get(data->dev); + if (ret) + return ret; + + ret = veml6031x00_get_it(data, &it_usec); + if (ret < 0) { + pm_runtime_put_autosuspend(data->dev); + return ret; + } + + /* + * Wait one integration period + 10% margin so the first triggered + * read does not race with the sensor completing its first conversion + * after power-on. + */ + fsleep(it_usec + (it_usec / 10)); + + return 0; +} + +static int veml6031x00_buffer_postdisable(struct iio_dev *iio) +{ + struct veml6031x00_data *data = iio_priv(iio); + + pm_runtime_put_autosuspend(data->dev); + + return 0; +} + +static const struct iio_buffer_setup_ops veml6031x00_buffer_setup_ops = { + .preenable = veml6031x00_buffer_preenable, + .postdisable = veml6031x00_buffer_postdisable, +}; + +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; + struct { + __le16 chans[2]; + aligned_s64 timestamp; + } scan = { }; + + if (test_bit(VEML6031X00_SCAN_ALS, iio->active_scan_mask) && + test_bit(VEML6031X00_SCAN_IR, iio->active_scan_mask)) { + ret = regmap_bulk_read(data->regmap, + VEML6031X00_REG_ALS_L, + &scan.chans, sizeof(scan.chans)); + if (ret) + goto done; + } else { + iio_for_each_active_channel(iio, ch) { + ret = regmap_bulk_read(data->regmap, + iio->channels[ch].address, + &scan.chans[i++], + sizeof(*scan.chans)); + if (ret) + goto done; + } + } + + iio_push_to_buffers_with_ts(iio, &scan, sizeof(scan), pf->timestamp); + +done: + iio_trigger_notify_done(iio->trig); + + return IRQ_HANDLED; +} + static int veml6031x00_validate_part_id(struct veml6031x00_data *data) { int part_id, ret; @@ -576,6 +683,13 @@ static int veml6031x00_probe(struct i2c_client *i2c) if (ret) 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\n"); + pm_runtime_put_autosuspend(dev); ret = devm_iio_device_register(dev, iio); -- 2.43.0