max44000: Initial triggered buffer support (06ad7ea1) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/iio/light/max44000.c

+62 −0

Original line number	Original line	Diff line number	Diff line
	@@ -19,6 +19,9 @@
	#include <linux/util_macros.h>		#include <linux/util_macros.h>
	#include <linux/iio/iio.h>		#include <linux/iio/iio.h>
	#include <linux/iio/sysfs.h>		#include <linux/iio/sysfs.h>
			#include <linux/iio/buffer.h>
			#include <linux/iio/trigger_consumer.h>
			#include <linux/iio/triggered_buffer.h>
	#include <linux/acpi.h>		#include <linux/acpi.h>

	#define MAX44000_DRV_NAME "max44000"		#define MAX44000_DRV_NAME "max44000"
	@@ -125,24 +128,41 @@ static const char max44000_scale_avail_str[] =
	"0.5 "		"0.5 "
	"4";		"4";

			#define MAX44000_SCAN_INDEX_ALS 0
			#define MAX44000_SCAN_INDEX_PRX 1

	static const struct iio_chan_spec max44000_channels[] = {		static const struct iio_chan_spec max44000_channels[] = {
	{		{
	.type = IIO_LIGHT,		.type = IIO_LIGHT,
	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \|		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \|
	BIT(IIO_CHAN_INFO_INT_TIME),		BIT(IIO_CHAN_INFO_INT_TIME),
			.scan_index = MAX44000_SCAN_INDEX_ALS,
			.scan_type = {
			.sign = 'u',
			.realbits = 14,
			.storagebits = 16,
			}
	},		},
	{		{
	.type = IIO_PROXIMITY,		.type = IIO_PROXIMITY,
	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
			.scan_index = MAX44000_SCAN_INDEX_PRX,
			.scan_type = {
			.sign = 'u',
			.realbits = 8,
			.storagebits = 16,
			}
	},		},
			IIO_CHAN_SOFT_TIMESTAMP(2),
	{		{
	.type = IIO_CURRENT,		.type = IIO_CURRENT,
	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) \|		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) \|
	BIT(IIO_CHAN_INFO_SCALE),		BIT(IIO_CHAN_INFO_SCALE),
	.extend_name = "led",		.extend_name = "led",
	.output = 1,		.output = 1,
			.scan_index = -1,
	},		},
	};		};

	@@ -467,6 +487,41 @@ static const struct regmap_config max44000_regmap_config = {
	.cache_type = REGCACHE_RBTREE,		.cache_type = REGCACHE_RBTREE,
	};		};

			static irqreturn_t max44000_trigger_handler(int irq, void *p)
			{
			struct iio_poll_func *pf = p;
			struct iio_dev *indio_dev = pf->indio_dev;
			struct max44000_data *data = iio_priv(indio_dev);
			u16 buf[8]; /* 2x u16 + padding + 8 bytes timestamp */
			int index = 0;
			unsigned int regval;
			int ret;

			mutex_lock(&data->lock);
			if (test_bit(MAX44000_SCAN_INDEX_ALS, indio_dev->active_scan_mask)) {
			ret = max44000_read_alsval(data);
			if (ret < 0)
			goto out_unlock;
			buf[index++] = ret;
			}
			if (test_bit(MAX44000_SCAN_INDEX_PRX, indio_dev->active_scan_mask)) {
			ret = regmap_read(data->regmap, MAX44000_REG_PRX_DATA, &regval);
			if (ret < 0)
			goto out_unlock;
			buf[index] = regval;
			}
			mutex_unlock(&data->lock);

			iio_push_to_buffers_with_timestamp(indio_dev, buf, iio_get_time_ns());
			iio_trigger_notify_done(indio_dev->trig);
			return IRQ_HANDLED;

			out_unlock:
			mutex_unlock(&data->lock);
			iio_trigger_notify_done(indio_dev->trig);
			return IRQ_HANDLED;
			}

	static int max44000_probe(struct i2c_client *client,		static int max44000_probe(struct i2c_client *client,
	const struct i2c_device_id *id)		const struct i2c_device_id *id)
	{		{
	@@ -534,6 +589,12 @@ static int max44000_probe(struct i2c_client *client,
	return ret;		return ret;
	}		}

			ret = iio_triggered_buffer_setup(indio_dev, NULL, max44000_trigger_handler, NULL);
			if (ret < 0) {
			dev_err(&client->dev, "iio triggered buffer setup failed\n");
			return ret;
			}

	return iio_device_register(indio_dev);		return iio_device_register(indio_dev);
	}		}

	@@ -542,6 +603,7 @@ static int max44000_remove(struct i2c_client *client)
	struct iio_dev *indio_dev = i2c_get_clientdata(client);		struct iio_dev *indio_dev = i2c_get_clientdata(client);

	iio_device_unregister(indio_dev);		iio_device_unregister(indio_dev);
			iio_triggered_buffer_cleanup(indio_dev);

	return 0;		return 0;
	}		}