1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *  Nano River Technologies viperboard IIO ADC driver
27 	u8 chan;  member
50 				struct iio_chan_spec const *chan,  in vprbrd_iio_read_raw()  argument
56 	struct vprbrd_adc *adc = iio_priv(iio_dev);  in vprbrd_iio_read_raw()  local
57 	struct vprbrd *vb = adc->vb;  in vprbrd_iio_read_raw()
58 	struct vprbrd_adc_msg *admsg = (struct vprbrd_adc_msg *)vb->buf;  in vprbrd_iio_read_raw()
62 		mutex_lock(&vb->lock);  in vprbrd_iio_read_raw()
64 		admsg->cmd = VPRBRD_ADC_CMD_GET;  in vprbrd_iio_read_raw()
65 		admsg->chan = chan->channel;  in vprbrd_iio_read_raw()
66 		admsg->val = 0x00;  in vprbrd_iio_read_raw()
68 		ret = usb_control_msg(vb->usb_dev,  in vprbrd_iio_read_raw()
69 			usb_sndctrlpipe(vb->usb_dev, 0), VPRBRD_USB_REQUEST_ADC,  in vprbrd_iio_read_raw()
73 			dev_err(&iio_dev->dev, "usb send error on adc read\n");  in vprbrd_iio_read_raw()
74 			error = -EREMOTEIO;  in vprbrd_iio_read_raw()
77 		ret = usb_control_msg(vb->usb_dev,  in vprbrd_iio_read_raw()
78 			usb_rcvctrlpipe(vb->usb_dev, 0), VPRBRD_USB_REQUEST_ADC,  in vprbrd_iio_read_raw()
82 		*val = admsg->val;  in vprbrd_iio_read_raw()
84 		mutex_unlock(&vb->lock);  in vprbrd_iio_read_raw()
87 			dev_err(&iio_dev->dev, "usb recv error on adc read\n");  in vprbrd_iio_read_raw()
88 			error = -EREMOTEIO;  in vprbrd_iio_read_raw()
96 		error = -EINVAL;  in vprbrd_iio_read_raw()
109 	struct vprbrd *vb = dev_get_drvdata(pdev->dev.parent);  in vprbrd_adc_probe()
110 	struct vprbrd_adc *adc;  in vprbrd_adc_probe()  local
115 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*adc));  in vprbrd_adc_probe()
117 		dev_err(&pdev->dev, "failed allocating iio device\n");  in vprbrd_adc_probe()
118 		return -ENOMEM;  in vprbrd_adc_probe()
121 	adc = iio_priv(indio_dev);  in vprbrd_adc_probe()
122 	adc->vb = vb;  in vprbrd_adc_probe()
123 	indio_dev->name = "viperboard adc";  in vprbrd_adc_probe()
124 	indio_dev->info = &vprbrd_adc_iio_info;  in vprbrd_adc_probe()
125 	indio_dev->modes = INDIO_DIRECT_MODE;  in vprbrd_adc_probe()
126 	indio_dev->channels = vprbrd_adc_iio_channels;  in vprbrd_adc_probe()
127 	indio_dev->num_channels = ARRAY_SIZE(vprbrd_adc_iio_channels);  in vprbrd_adc_probe()
129 	ret = devm_iio_device_register(&pdev->dev, indio_dev);  in vprbrd_adc_probe()
131 		dev_err(&pdev->dev, "could not register iio (adc)");  in vprbrd_adc_probe()
140 		.name	= "viperboard-adc",
148 MODULE_DESCRIPTION("IIO ADC driver for Nano River Techs Viperboard");
150 MODULE_ALIAS("platform:viperboard-adc");