Re: [PATCH v3 5/5] iio: adc: add viperboard adc driver
On 11/05/2012 02:48 PM, Lars Poeschel wrote:
> From: Lars Poeschel
>
> This adds the mfd cell to use the adc part of the Nano River Technologies
> viperboard.
>
One utter nitpick inline (nice to clean up but totally trivial)
> Signed-off-by: Lars Poeschel
Acked-by: Jonathan Cameron
As there is a clear dependence on the mfd elements here this should
probably go though Samuel's tree once people are happy with the other elements.
> ---
> drivers/iio/adc/Kconfig |7 ++
> drivers/iio/adc/Makefile |1 +
> drivers/iio/adc/viperboard_adc.c | 181
> ++
> drivers/mfd/viperboard.c |3 +
> include/linux/mfd/viperboard.h |1 +
> 5 files changed, 193 insertions(+)
> create mode 100644 drivers/iio/adc/viperboard_adc.c
>
> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> index 4927581..35ad77d 100644
> --- a/drivers/iio/adc/Kconfig
> +++ b/drivers/iio/adc/Kconfig
> @@ -60,4 +60,11 @@ config LP8788_ADC
> help
> Say yes here to build support for TI LP8788 ADC.
>
> +config VIPERBOARD_ADC
> + tristate "Viperboard ADC support"
> + depends on MFD_VIPERBOARD && USB
> + help
> + Say yes here to access the ADC part of the Nano River
> + Technologies Viperboard.
> +
> endmenu
> diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
> index 900995d..4852c2e 100644
> --- a/drivers/iio/adc/Makefile
> +++ b/drivers/iio/adc/Makefile
> @@ -8,3 +8,4 @@ obj-$(CONFIG_AD7476) += ad7476.o
> obj-$(CONFIG_AD7791) += ad7791.o
> obj-$(CONFIG_AT91_ADC) += at91_adc.o
> obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o
> +obj-$(CONFIG_VIPERBOARD_ADC) += viperboard_adc.o
> diff --git a/drivers/iio/adc/viperboard_adc.c
> b/drivers/iio/adc/viperboard_adc.c
> new file mode 100644
> index 000..58345c7
> --- /dev/null
> +++ b/drivers/iio/adc/viperboard_adc.c
> @@ -0,0 +1,181 @@
> +/*
> + * Nano River Technologies viperboard iio ADC driver
IIO (told you it was a nitpick).
> + *
> + * (C) 2012 by Lemonage GmbH
> + * Author: Lars Poeschel
> + * All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; either version 2 of the License, or (at
> your
> + * option) any later version.
> + *
> + */
> +
> +#include
> +#include
> +#include
> +#include
> +#include
> +#include
> +#include
> +
> +#include
> +#include
> +
> +#include
> +
> +#define VPRBRD_ADC_CMD_GET 0x00
> +
> +struct vprbrd_adc_msg {
> + u8 cmd;
> + u8 chan;
> + u8 val;
> +} __packed;
> +
> +struct vprbrd_adc {
> + struct vprbrd *vb;
> +};
> +
> +#define VPRBRD_ADC_CHANNEL(_index) { \
> + .type = IIO_VOLTAGE,\
> + .indexed = 1, \
> + .channel = _index, \
> + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,\
> + .scan_index = _index, \
> + .scan_type = { \
> + .sign = 'u',\
> + .realbits = 8, \
> + .storagebits = 8, \
> + }, \
> +}
> +
> +static struct iio_chan_spec const vprbrd_adc_iio_channels[] = {
> + VPRBRD_ADC_CHANNEL(0),
> + VPRBRD_ADC_CHANNEL(1),
> + VPRBRD_ADC_CHANNEL(2),
> + VPRBRD_ADC_CHANNEL(3),
> +};
> +
> +static int vprbrd_iio_read_raw(struct iio_dev *iio_dev,
> + struct iio_chan_spec const *chan,
> + int *val,
> + int *val2,
> + long info)
> +{
> + int ret, error = 0;
> + struct vprbrd_adc *adc = iio_priv(iio_dev);
> + struct vprbrd *vb = adc->vb;
> + struct vprbrd_adc_msg *admsg = (struct vprbrd_adc_msg *)vb->buf;
> +
> + switch (info) {
> + case IIO_CHAN_INFO_RAW:
> + mutex_lock(>lock);
> +
> + admsg->cmd = VPRBRD_ADC_CMD_GET;
> + admsg->chan = chan->scan_index;
> + admsg->val = 0x00;
> +
> + ret = usb_control_msg(vb->usb_dev,
> + usb_sndctrlpipe(vb->usb_dev, 0), VPRBRD_USB_REQUEST_ADC,
> + VPRBRD_USB_TYPE_OUT, 0x, 0x, admsg,
> + sizeof(struct vprbrd_adc_msg), VPRBRD_USB_TIMEOUT_MS);
> + if (ret != sizeof(struct vprbrd_adc_msg)) {
> + dev_err(_dev->dev, "usb send error on adc read\n");
> + error = -EREMOTEIO;
> + }
> +
> + ret = usb_control_msg(vb->usb_dev,
> + usb_rcvctrlpipe(vb->usb_dev, 0), VPRBRD_USB_REQUEST_ADC,
> + VPRBRD_USB_TYPE_IN, 0x, 0x, admsg,
> +
Re: [PATCH v3 5/5] iio: adc: add viperboard adc driver
On 11/05/2012 03:48 PM, Lars Poeschel wrote:
> From: Lars Poeschel
>
> This adds the mfd cell to use the adc part of the Nano River Technologies
> viperboard.
>
> Signed-off-by: Lars Poeschel
Looks good to me.
Reviewed-by: Lars-Peter Clausen
If you happen to resend the series there is one tiny bit that could be
changed, but no need to resend the series just for this.
> ---
> drivers/iio/adc/Kconfig |7 ++
> drivers/iio/adc/Makefile |1 +
> drivers/iio/adc/viperboard_adc.c | 181
> ++
> drivers/mfd/viperboard.c |3 +
> include/linux/mfd/viperboard.h |1 +
> 5 files changed, 193 insertions(+)
> create mode 100644 drivers/iio/adc/viperboard_adc.c
>
> +
> +static int __devinit vprbrd_adc_probe(struct platform_device *pdev)
> +{
> + struct vprbrd *vb = dev_get_drvdata(pdev->dev.parent);
> + struct vprbrd_adc *adc;
> + struct iio_dev *indio_dev;
> + int ret;
> +
> + /* registering iio */
> + indio_dev = iio_device_alloc(sizeof(struct vprbrd_adc));
sizeof(*adc)
> + if (!indio_dev) {
> + dev_err(>dev, "failed allocating iio device\n");
> + return -ENOMEM;
> + }
--
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[PATCH v3 5/5] iio: adc: add viperboard adc driver
From: Lars Poeschel
This adds the mfd cell to use the adc part of the Nano River Technologies
viperboard.
Signed-off-by: Lars Poeschel
---
drivers/iio/adc/Kconfig |7 ++
drivers/iio/adc/Makefile |1 +
drivers/iio/adc/viperboard_adc.c | 181 ++
drivers/mfd/viperboard.c |3 +
include/linux/mfd/viperboard.h |1 +
5 files changed, 193 insertions(+)
create mode 100644 drivers/iio/adc/viperboard_adc.c
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 4927581..35ad77d 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -60,4 +60,11 @@ config LP8788_ADC
help
Say yes here to build support for TI LP8788 ADC.
+config VIPERBOARD_ADC
+ tristate "Viperboard ADC support"
+ depends on MFD_VIPERBOARD && USB
+ help
+ Say yes here to access the ADC part of the Nano River
+ Technologies Viperboard.
+
endmenu
diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
index 900995d..4852c2e 100644
--- a/drivers/iio/adc/Makefile
+++ b/drivers/iio/adc/Makefile
@@ -8,3 +8,4 @@ obj-$(CONFIG_AD7476) += ad7476.o
obj-$(CONFIG_AD7791) += ad7791.o
obj-$(CONFIG_AT91_ADC) += at91_adc.o
obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o
+obj-$(CONFIG_VIPERBOARD_ADC) += viperboard_adc.o
diff --git a/drivers/iio/adc/viperboard_adc.c b/drivers/iio/adc/viperboard_adc.c
new file mode 100644
index 000..58345c7
--- /dev/null
+++ b/drivers/iio/adc/viperboard_adc.c
@@ -0,0 +1,181 @@
+/*
+ * Nano River Technologies viperboard iio ADC driver
+ *
+ * (C) 2012 by Lemonage GmbH
+ * Author: Lars Poeschel
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#include
+#include
+
+#include
+
+#define VPRBRD_ADC_CMD_GET 0x00
+
+struct vprbrd_adc_msg {
+ u8 cmd;
+ u8 chan;
+ u8 val;
+} __packed;
+
+struct vprbrd_adc {
+ struct vprbrd *vb;
+};
+
+#define VPRBRD_ADC_CHANNEL(_index) { \
+ .type = IIO_VOLTAGE,\
+ .indexed = 1, \
+ .channel = _index, \
+ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,\
+ .scan_index = _index, \
+ .scan_type = { \
+ .sign = 'u',\
+ .realbits = 8, \
+ .storagebits = 8, \
+ }, \
+}
+
+static struct iio_chan_spec const vprbrd_adc_iio_channels[] = {
+ VPRBRD_ADC_CHANNEL(0),
+ VPRBRD_ADC_CHANNEL(1),
+ VPRBRD_ADC_CHANNEL(2),
+ VPRBRD_ADC_CHANNEL(3),
+};
+
+static int vprbrd_iio_read_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long info)
+{
+ int ret, error = 0;
+ struct vprbrd_adc *adc = iio_priv(iio_dev);
+ struct vprbrd *vb = adc->vb;
+ struct vprbrd_adc_msg *admsg = (struct vprbrd_adc_msg *)vb->buf;
+
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ mutex_lock(>lock);
+
+ admsg->cmd = VPRBRD_ADC_CMD_GET;
+ admsg->chan = chan->scan_index;
+ admsg->val = 0x00;
+
+ ret = usb_control_msg(vb->usb_dev,
+ usb_sndctrlpipe(vb->usb_dev, 0), VPRBRD_USB_REQUEST_ADC,
+ VPRBRD_USB_TYPE_OUT, 0x, 0x, admsg,
+ sizeof(struct vprbrd_adc_msg), VPRBRD_USB_TIMEOUT_MS);
+ if (ret != sizeof(struct vprbrd_adc_msg)) {
+ dev_err(_dev->dev, "usb send error on adc read\n");
+ error = -EREMOTEIO;
+ }
+
+ ret = usb_control_msg(vb->usb_dev,
+ usb_rcvctrlpipe(vb->usb_dev, 0), VPRBRD_USB_REQUEST_ADC,
+ VPRBRD_USB_TYPE_IN, 0x, 0x, admsg,
+ sizeof(struct vprbrd_adc_msg), VPRBRD_USB_TIMEOUT_MS);
+
+ *val = admsg->val;
+
+ mutex_unlock(>lock);
+
+ if (ret != sizeof(struct vprbrd_adc_msg)) {
+ dev_err(_dev->dev, "usb recv error on adc read\n");
+ error = -EREMOTEIO;
+ }
+
+ if (error)
+ goto error;
+
+ return IIO_VAL_INT;
+ default:
+ error = -EINVAL;
+ break;
[PATCH v3 5/5] iio: adc: add viperboard adc driver
From: Lars Poeschel poesc...@lemonage.de
This adds the mfd cell to use the adc part of the Nano River Technologies
viperboard.
Signed-off-by: Lars Poeschel poesc...@lemonage.de
---
drivers/iio/adc/Kconfig |7 ++
drivers/iio/adc/Makefile |1 +
drivers/iio/adc/viperboard_adc.c | 181 ++
drivers/mfd/viperboard.c |3 +
include/linux/mfd/viperboard.h |1 +
5 files changed, 193 insertions(+)
create mode 100644 drivers/iio/adc/viperboard_adc.c
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 4927581..35ad77d 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -60,4 +60,11 @@ config LP8788_ADC
help
Say yes here to build support for TI LP8788 ADC.
+config VIPERBOARD_ADC
+ tristate Viperboard ADC support
+ depends on MFD_VIPERBOARD USB
+ help
+ Say yes here to access the ADC part of the Nano River
+ Technologies Viperboard.
+
endmenu
diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
index 900995d..4852c2e 100644
--- a/drivers/iio/adc/Makefile
+++ b/drivers/iio/adc/Makefile
@@ -8,3 +8,4 @@ obj-$(CONFIG_AD7476) += ad7476.o
obj-$(CONFIG_AD7791) += ad7791.o
obj-$(CONFIG_AT91_ADC) += at91_adc.o
obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o
+obj-$(CONFIG_VIPERBOARD_ADC) += viperboard_adc.o
diff --git a/drivers/iio/adc/viperboard_adc.c b/drivers/iio/adc/viperboard_adc.c
new file mode 100644
index 000..58345c7
--- /dev/null
+++ b/drivers/iio/adc/viperboard_adc.c
@@ -0,0 +1,181 @@
+/*
+ * Nano River Technologies viperboard iio ADC driver
+ *
+ * (C) 2012 by Lemonage GmbH
+ * Author: Lars Poeschel poesc...@lemonage.de
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include linux/kernel.h
+#include linux/errno.h
+#include linux/module.h
+#include linux/slab.h
+#include linux/types.h
+#include linux/mutex.h
+#include linux/platform_device.h
+
+#include linux/usb.h
+#include linux/iio/iio.h
+
+#include linux/mfd/viperboard.h
+
+#define VPRBRD_ADC_CMD_GET 0x00
+
+struct vprbrd_adc_msg {
+ u8 cmd;
+ u8 chan;
+ u8 val;
+} __packed;
+
+struct vprbrd_adc {
+ struct vprbrd *vb;
+};
+
+#define VPRBRD_ADC_CHANNEL(_index) { \
+ .type = IIO_VOLTAGE,\
+ .indexed = 1, \
+ .channel = _index, \
+ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,\
+ .scan_index = _index, \
+ .scan_type = { \
+ .sign = 'u',\
+ .realbits = 8, \
+ .storagebits = 8, \
+ }, \
+}
+
+static struct iio_chan_spec const vprbrd_adc_iio_channels[] = {
+ VPRBRD_ADC_CHANNEL(0),
+ VPRBRD_ADC_CHANNEL(1),
+ VPRBRD_ADC_CHANNEL(2),
+ VPRBRD_ADC_CHANNEL(3),
+};
+
+static int vprbrd_iio_read_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long info)
+{
+ int ret, error = 0;
+ struct vprbrd_adc *adc = iio_priv(iio_dev);
+ struct vprbrd *vb = adc-vb;
+ struct vprbrd_adc_msg *admsg = (struct vprbrd_adc_msg *)vb-buf;
+
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ mutex_lock(vb-lock);
+
+ admsg-cmd = VPRBRD_ADC_CMD_GET;
+ admsg-chan = chan-scan_index;
+ admsg-val = 0x00;
+
+ ret = usb_control_msg(vb-usb_dev,
+ usb_sndctrlpipe(vb-usb_dev, 0), VPRBRD_USB_REQUEST_ADC,
+ VPRBRD_USB_TYPE_OUT, 0x, 0x, admsg,
+ sizeof(struct vprbrd_adc_msg), VPRBRD_USB_TIMEOUT_MS);
+ if (ret != sizeof(struct vprbrd_adc_msg)) {
+ dev_err(iio_dev-dev, usb send error on adc read\n);
+ error = -EREMOTEIO;
+ }
+
+ ret = usb_control_msg(vb-usb_dev,
+ usb_rcvctrlpipe(vb-usb_dev, 0), VPRBRD_USB_REQUEST_ADC,
+ VPRBRD_USB_TYPE_IN, 0x, 0x, admsg,
+ sizeof(struct vprbrd_adc_msg), VPRBRD_USB_TIMEOUT_MS);
+
+ *val = admsg-val;
+
+ mutex_unlock(vb-lock);
+
+ if (ret != sizeof(struct vprbrd_adc_msg)) {
+ dev_err(iio_dev-dev, usb recv error on adc read\n);
+ error =
Re: [PATCH v3 5/5] iio: adc: add viperboard adc driver
On 11/05/2012 03:48 PM, Lars Poeschel wrote:
From: Lars Poeschel poesc...@lemonage.de
This adds the mfd cell to use the adc part of the Nano River Technologies
viperboard.
Signed-off-by: Lars Poeschel poesc...@lemonage.de
Looks good to me.
Reviewed-by: Lars-Peter Clausen l...@metafoo.de
If you happen to resend the series there is one tiny bit that could be
changed, but no need to resend the series just for this.
---
drivers/iio/adc/Kconfig |7 ++
drivers/iio/adc/Makefile |1 +
drivers/iio/adc/viperboard_adc.c | 181
++
drivers/mfd/viperboard.c |3 +
include/linux/mfd/viperboard.h |1 +
5 files changed, 193 insertions(+)
create mode 100644 drivers/iio/adc/viperboard_adc.c
+
+static int __devinit vprbrd_adc_probe(struct platform_device *pdev)
+{
+ struct vprbrd *vb = dev_get_drvdata(pdev-dev.parent);
+ struct vprbrd_adc *adc;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ /* registering iio */
+ indio_dev = iio_device_alloc(sizeof(struct vprbrd_adc));
sizeof(*adc)
+ if (!indio_dev) {
+ dev_err(pdev-dev, failed allocating iio device\n);
+ return -ENOMEM;
+ }
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH v3 5/5] iio: adc: add viperboard adc driver
On 11/05/2012 02:48 PM, Lars Poeschel wrote:
From: Lars Poeschel poesc...@lemonage.de
This adds the mfd cell to use the adc part of the Nano River Technologies
viperboard.
One utter nitpick inline (nice to clean up but totally trivial)
Signed-off-by: Lars Poeschel poesc...@lemonage.de
Acked-by: Jonathan Cameron ji...@kernel.org
As there is a clear dependence on the mfd elements here this should
probably go though Samuel's tree once people are happy with the other elements.
---
drivers/iio/adc/Kconfig |7 ++
drivers/iio/adc/Makefile |1 +
drivers/iio/adc/viperboard_adc.c | 181
++
drivers/mfd/viperboard.c |3 +
include/linux/mfd/viperboard.h |1 +
5 files changed, 193 insertions(+)
create mode 100644 drivers/iio/adc/viperboard_adc.c
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 4927581..35ad77d 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -60,4 +60,11 @@ config LP8788_ADC
help
Say yes here to build support for TI LP8788 ADC.
+config VIPERBOARD_ADC
+ tristate Viperboard ADC support
+ depends on MFD_VIPERBOARD USB
+ help
+ Say yes here to access the ADC part of the Nano River
+ Technologies Viperboard.
+
endmenu
diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
index 900995d..4852c2e 100644
--- a/drivers/iio/adc/Makefile
+++ b/drivers/iio/adc/Makefile
@@ -8,3 +8,4 @@ obj-$(CONFIG_AD7476) += ad7476.o
obj-$(CONFIG_AD7791) += ad7791.o
obj-$(CONFIG_AT91_ADC) += at91_adc.o
obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o
+obj-$(CONFIG_VIPERBOARD_ADC) += viperboard_adc.o
diff --git a/drivers/iio/adc/viperboard_adc.c
b/drivers/iio/adc/viperboard_adc.c
new file mode 100644
index 000..58345c7
--- /dev/null
+++ b/drivers/iio/adc/viperboard_adc.c
@@ -0,0 +1,181 @@
+/*
+ * Nano River Technologies viperboard iio ADC driver
IIO (told you it was a nitpick).
+ *
+ * (C) 2012 by Lemonage GmbH
+ * Author: Lars Poeschel poesc...@lemonage.de
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at
your
+ * option) any later version.
+ *
+ */
+
+#include linux/kernel.h
+#include linux/errno.h
+#include linux/module.h
+#include linux/slab.h
+#include linux/types.h
+#include linux/mutex.h
+#include linux/platform_device.h
+
+#include linux/usb.h
+#include linux/iio/iio.h
+
+#include linux/mfd/viperboard.h
+
+#define VPRBRD_ADC_CMD_GET 0x00
+
+struct vprbrd_adc_msg {
+ u8 cmd;
+ u8 chan;
+ u8 val;
+} __packed;
+
+struct vprbrd_adc {
+ struct vprbrd *vb;
+};
+
+#define VPRBRD_ADC_CHANNEL(_index) { \
+ .type = IIO_VOLTAGE,\
+ .indexed = 1, \
+ .channel = _index, \
+ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,\
+ .scan_index = _index, \
+ .scan_type = { \
+ .sign = 'u',\
+ .realbits = 8, \
+ .storagebits = 8, \
+ }, \
+}
+
+static struct iio_chan_spec const vprbrd_adc_iio_channels[] = {
+ VPRBRD_ADC_CHANNEL(0),
+ VPRBRD_ADC_CHANNEL(1),
+ VPRBRD_ADC_CHANNEL(2),
+ VPRBRD_ADC_CHANNEL(3),
+};
+
+static int vprbrd_iio_read_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long info)
+{
+ int ret, error = 0;
+ struct vprbrd_adc *adc = iio_priv(iio_dev);
+ struct vprbrd *vb = adc-vb;
+ struct vprbrd_adc_msg *admsg = (struct vprbrd_adc_msg *)vb-buf;
+
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ mutex_lock(vb-lock);
+
+ admsg-cmd = VPRBRD_ADC_CMD_GET;
+ admsg-chan = chan-scan_index;
+ admsg-val = 0x00;
+
+ ret = usb_control_msg(vb-usb_dev,
+ usb_sndctrlpipe(vb-usb_dev, 0), VPRBRD_USB_REQUEST_ADC,
+ VPRBRD_USB_TYPE_OUT, 0x, 0x, admsg,
+ sizeof(struct vprbrd_adc_msg), VPRBRD_USB_TIMEOUT_MS);
+ if (ret != sizeof(struct vprbrd_adc_msg)) {
+ dev_err(iio_dev-dev, usb send error on adc read\n);
+ error = -EREMOTEIO;
+ }
+
+ ret = usb_control_msg(vb-usb_dev,
+ usb_rcvctrlpipe(vb-usb_dev, 0), VPRBRD_USB_REQUEST_ADC,
+
