Merge tag 'iio-for-3.8d' of git://git.kernel.org/pub/scm/linux/kernel…

…/git/jic23/iio into staging-next

IIO cleanups and fixes from Jonathan:

"4th set of IIO driver updates and new functionality for the 3.8 cycle.

2 drivers going through final cleanup and moving out of staging.

Addition to the core of support for multiple buffers from a single
datastream.  This functionality is core in allowing multiple users
of interrupt driven data streams from the devices.  First user
will shortly be an input bridge driver.  This has been in review
/ revision for over a year resulting in a far cleaner result.
Much of the work had been in precursor patches. Here we just
add the buffer set tear up and down support + switch to multiple
buffer pushing in the drivers (a one line change in all users).
Thanks to those who have tested / reviewed this set."

drivers/iio/Kconfig

@@ -20,6 +20,12 @@ config IIO_BUFFER
 
 if IIO_BUFFER
 
+config IIO_BUFFER_CB
+boolean "IIO callback buffer used for push in-kernel interfaces"
+	help
+	  Should be selected by any drivers that do-inkernel push
+	  usage.  That is, those where the data is pushed to the consumer.
+
 config IIO_KFIFO_BUF
 	select IIO_TRIGGER
 	tristate "Industrial I/O buffering based on kfifo"

drivers/iio/Makefile

@@ -6,6 +6,7 @@ obj-$(CONFIG_IIO) += industrialio.o
 industrialio-y := industrialio-core.o industrialio-event.o inkern.o
 industrialio-$(CONFIG_IIO_BUFFER) += industrialio-buffer.o
 industrialio-$(CONFIG_IIO_TRIGGER) += industrialio-trigger.o
+industrialio-$(CONFIG_IIO_BUFFER_CB) += buffer_cb.o
 
 obj-$(CONFIG_IIO_TRIGGERED_BUFFER) += industrialio-triggered-buffer.o
 obj-$(CONFIG_IIO_KFIFO_BUF) += kfifo_buf.o

drivers/iio/accel/hid-sensor-accel-3d.c

@@ -197,21 +197,8 @@ static const struct iio_info accel_3d_info = {
 /* Function to push data to buffer */
 static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len)
 {
-	struct iio_buffer *buffer = indio_dev->buffer;
-	int datum_sz;
-
 	dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
-	if (!buffer) {
-		dev_err(&indio_dev->dev, "Buffer == NULL\n");
-		return;
-	}
-	datum_sz = buffer->access->get_bytes_per_datum(buffer);
-	if (len > datum_sz) {
-		dev_err(&indio_dev->dev, "Datum size mismatch %d:%d\n", len,
-				datum_sz);
-		return;
-	}
-	iio_push_to_buffer(buffer, (u8 *)data);
+	iio_push_to_buffers(indio_dev, (u8 *)data);
 }
 
 /* Callback handler to send event after all samples are received and captured */

drivers/iio/adc/Kconfig

@@ -45,6 +45,19 @@ config AD7476
 	  To compile this driver as a module, choose M here: the
 	  module will be called ad7476.
 
+config AD7887
+	tristate "Analog Devices AD7887 ADC driver"
+	depends on SPI
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	help
+	  Say yes here to build support for Analog Devices
+	  AD7887 SPI analog to digital converter (ADC).
+	  If unsure, say N (but it's safe to say "Y").
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ad7887.
+
 config AT91_ADC
 	tristate "Atmel AT91 ADC"
 	depends on ARCH_AT91
@@ -60,4 +73,22 @@ config LP8788_ADC
 	help
 	  Say yes here to build support for TI LP8788 ADC.
 
+config MAX1363
+	tristate "Maxim max1363 ADC driver"
+	depends on I2C
+	select IIO_TRIGGER
+	select MAX1363_RING_BUFFER
+	select IIO_BUFFER
+	select IIO_KFIFO_BUF
+	help
+	  Say yes here to build support for many Maxim i2c analog to digital
+	  converters (ADC). (max1361, max1362, max1363, max1364, max1036,
+	  max1037, max1038, max1039, max1136, max1136, max1137, max1138,
+	  max1139, max1236, max1237, max11238, max1239, max11600, max11601,
+	  max11602, max11603, max11604, max11605, max11606, max11607,
+	  max11608, max11609, max11610, max11611, max11612, max11613,
+	  max11614, max11615, max11616, max11617, max11644, max11645,
+	  max11646, max11647) Provides direct access via sysfs and buffered
+	  data via the iio dev interface.
+
 endmenu

drivers/iio/adc/Makefile

@@ -6,5 +6,7 @@ obj-$(CONFIG_AD_SIGMA_DELTA) += ad_sigma_delta.o
 obj-$(CONFIG_AD7266) += ad7266.o
 obj-$(CONFIG_AD7476) += ad7476.o
 obj-$(CONFIG_AD7791) += ad7791.o
+obj-$(CONFIG_AD7887) += ad7887.o
 obj-$(CONFIG_AT91_ADC) += at91_adc.o
 obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o
+obj-$(CONFIG_MAX1363) += max1363.o

drivers/iio/adc/ad7266.c

@@ -91,15 +91,14 @@ static irqreturn_t ad7266_trigger_handler(int irq, void *p)
 {
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
-	struct iio_buffer *buffer = indio_dev->buffer;
 	struct ad7266_state *st = iio_priv(indio_dev);
 	int ret;
 
 	ret = spi_read(st->spi, st->data, 4);
 	if (ret == 0) {
 		if (indio_dev->scan_timestamp)
 			((s64 *)st->data)[1] = pf->timestamp;
-		iio_push_to_buffer(buffer, (u8 *)st->data);
+		iio_push_to_buffers(indio_dev, (u8 *)st->data);
 	}
 
 	iio_trigger_notify_done(indio_dev->trig);

drivers/iio/adc/ad7476.c

@@ -76,7 +76,7 @@ static irqreturn_t ad7476_trigger_handler(int irq, void  *p)
 	if (indio_dev->scan_timestamp)
 		((s64 *)st->data)[1] = time_ns;
 
-	iio_push_to_buffer(indio_dev->buffer, st->data);
+	iio_push_to_buffers(indio_dev, st->data);
 done:
 	iio_trigger_notify_done(indio_dev->trig);