1 // SPDX-License-Identifier: GPL-2.0
4  * Copyright (c) 2019-2020 Artur Rojek <contact@artur-rojek.eu>
35 	return (max + min) - val;  in adc_joystick_invert()
43 	for (i = 0; i < joy->num_chans; i++) {  in adc_joystick_poll()
44 		ret = iio_read_channel_raw(&joy->chans[i], &val);  in adc_joystick_poll()
47 		if (joy->axes[i].inverted)  in adc_joystick_poll()
49 		input_report_abs(input, joy->axes[i].code, val);  in adc_joystick_poll()
62 	bytes = joy->chans[0].channel->scan_type.storagebits >> 3;  in adc_joystick_handle()
64 	for (i = 0; i < joy->num_chans; ++i) {  in adc_joystick_handle()
65 		idx = joy->chans[i].channel->scan_index;  in adc_joystick_handle()
66 		endianness = joy->chans[i].channel->scan_type.endianness;  in adc_joystick_handle()
67 		msb = joy->chans[i].channel->scan_type.realbits - 1;  in adc_joystick_handle()
68 		sign = tolower(joy->chans[i].channel->scan_type.sign) == 's';  in adc_joystick_handle()
89 			return -EINVAL;  in adc_joystick_handle()
92 		val >>= joy->chans[i].channel->scan_type.shift;  in adc_joystick_handle()
97 		if (joy->axes[i].inverted)  in adc_joystick_handle()
98 			val = adc_joystick_invert(joy->input, i, val);  in adc_joystick_handle()
99 		input_report_abs(joy->input, joy->axes[i].code, val);  in adc_joystick_handle()
102 	input_sync(joy->input);  in adc_joystick_handle()
110 	struct device *devp = &dev->dev;  in adc_joystick_open()
113 	ret = iio_channel_start_all_cb(joy->buffer);  in adc_joystick_open()
124 	iio_channel_stop_all_cb(joy->buffer);  in adc_joystick_close()
134 	struct adc_joystick_axis *axes = joy->axes;  in adc_joystick_set_axes()
135 	s32 range[2], fuzz, flat;  in adc_joystick_set_axes()  local
142 		return -EINVAL;  in adc_joystick_set_axes()
145 	if (num_axes != joy->num_chans) {  in adc_joystick_set_axes()
147 			num_axes, joy->num_chans);  in adc_joystick_set_axes()
148 		return -EINVAL;  in adc_joystick_set_axes()
160 			return -EINVAL;  in adc_joystick_set_axes()
170 		error = fwnode_property_read_u32_array(child, "abs-range",  in adc_joystick_set_axes()
173 			dev_err(dev, "abs-range invalid or missing\n");  in adc_joystick_set_axes()
178 			dev_dbg(dev, "abs-axis %d inverted\n", i);  in adc_joystick_set_axes()
183 		if (fwnode_property_read_u32(child, "abs-fuzz", &fuzz))  in adc_joystick_set_axes()
186 		if (fwnode_property_read_u32(child, "abs-flat", &flat))  in adc_joystick_set_axes()
187 			flat = 0;  in adc_joystick_set_axes()
189 		input_set_abs_params(joy->input, axes[i].code,  in adc_joystick_set_axes()
190 				     range[0], range[1], fuzz, flat);  in adc_joystick_set_axes()
212 		bits = chans[i].channel->scan_type.storagebits;  in adc_joystick_count_channels()
215 			return -EINVAL;  in adc_joystick_count_channels()
217 		if (bits != chans[0].channel->scan_type.storagebits) {  in adc_joystick_count_channels()
219 			return -EINVAL;  in adc_joystick_count_channels()
229 	struct device *dev = &pdev->dev;  in adc_joystick_probe()
240 		if (error != -EPROBE_DEFER)  in adc_joystick_probe()
245 	error = device_property_read_u32(dev, "poll-interval", &poll_interval);  in adc_joystick_probe()
247 		/* -EINVAL means the property is absent. */  in adc_joystick_probe()
248 		if (error != -EINVAL)  in adc_joystick_probe()
251 		dev_err(dev, "Unable to get poll-interval\n");  in adc_joystick_probe()
252 		return -EINVAL;  in adc_joystick_probe()
262 		return -ENOMEM;  in adc_joystick_probe()
264 	joy->chans = chans;  in adc_joystick_probe()
265 	joy->num_chans = num_chans;  in adc_joystick_probe()
270 		return -ENOMEM;  in adc_joystick_probe()
273 	joy->input = input;  in adc_joystick_probe()
274 	input->name = pdev->name;  in adc_joystick_probe()
275 	input->id.bustype = BUS_HOST;  in adc_joystick_probe()
285 		input->open = adc_joystick_open;  in adc_joystick_probe()
286 		input->close = adc_joystick_close;  in adc_joystick_probe()
288 		joy->buffer = iio_channel_get_all_cb(dev, adc_joystick_handle,  in adc_joystick_probe()
290 		if (IS_ERR(joy->buffer)) {  in adc_joystick_probe()
292 			return PTR_ERR(joy->buffer);  in adc_joystick_probe()
296 						 joy->buffer);  in adc_joystick_probe()
315 	{ .compatible = "adc-joystick", },
322 		.name = "adc-joystick",
330 MODULE_AUTHOR("Artur Rojek <contact@artur-rojek.eu>");