1 // SPDX-License-Identifier: GPL-2.0-only
6  *  Author: Lars-Peter Clausen <lars@metafoo.de>
13 #include "xilinx-xadc.h"
19 	case XADC_THRESHOLD_OT_MAX:  in xadc_event_to_channel()
20 	case XADC_THRESHOLD_TEMP_MAX:  in xadc_event_to_channel()
21 		return &indio_dev->channels[0];  in xadc_event_to_channel()
22 	case XADC_THRESHOLD_VCCINT_MAX:  in xadc_event_to_channel()
23 	case XADC_THRESHOLD_VCCAUX_MAX:  in xadc_event_to_channel()
24 		return &indio_dev->channels[event];  in xadc_event_to_channel()
26 		return &indio_dev->channels[event-1];  in xadc_event_to_channel()
40 	if (chan->type == IIO_TEMP) {  in xadc_handle_event()
42 		 * The temperature channel only supports over-temperature  in xadc_handle_event()
46 			IIO_UNMOD_EVENT_CODE(chan->type, chan->channel,  in xadc_handle_event()
52 		 * lower threshold event. Userspace will have to check the  in xadc_handle_event()
56 			IIO_UNMOD_EVENT_CODE(chan->type, chan->channel,  in xadc_handle_event()
75 	if (chan->type == IIO_TEMP) {  in xadc_get_threshold_offset()
78 		if (chan->channel < 2)  in xadc_get_threshold_offset()
79 			offset = chan->channel + 1;  in xadc_get_threshold_offset()
81 			offset = chan->channel + 6;  in xadc_get_threshold_offset()
92 	if (chan->type == IIO_TEMP)  in xadc_get_alarm_mask()
94 	switch (chan->channel) {  in xadc_get_alarm_mask()
95 	case 0:  in xadc_get_alarm_mask()
97 	case 1:  in xadc_get_alarm_mask()
99 	case 2:  in xadc_get_alarm_mask()
101 	case 3:  in xadc_get_alarm_mask()
103 	case 4:  in xadc_get_alarm_mask()
105 	case 5:  in xadc_get_alarm_mask()
119 	return (bool)(xadc->alarm_mask & xadc_get_alarm_mask(chan));  in xadc_read_event_config()
131 	mutex_lock(&xadc->mutex);  in xadc_write_event_config()
134 		xadc->alarm_mask |= alarm;  in xadc_write_event_config()
136 		xadc->alarm_mask &= ~alarm;  in xadc_write_event_config()
138 	xadc->ops->update_alarm(xadc, xadc->alarm_mask);  in xadc_write_event_config()
146 	cfg &= ~((xadc->alarm_mask & 0xf0) << 4); /* bram, pint, paux, ddr */  in xadc_write_event_config()
147 	cfg &= ~((xadc->alarm_mask & 0x08) >> 3); /* ot */  in xadc_write_event_config()
148 	cfg &= ~((xadc->alarm_mask & 0x07) << 1); /* temp, vccint, vccaux */  in xadc_write_event_config()
153 	mutex_unlock(&xadc->mutex);  in xadc_write_event_config()
158 /* Register value is msb aligned, the lower 4 bits are ignored */
170 	case IIO_EV_INFO_VALUE:  in xadc_read_event_value()
171 		*val = xadc->threshold[offset];  in xadc_read_event_value()
173 	case IIO_EV_INFO_HYSTERESIS:  in xadc_read_event_value()
174 		*val = xadc->temp_hysteresis;  in xadc_read_event_value()
177 		return -EINVAL;  in xadc_read_event_value()
197 		return -EINVAL;  in xadc_write_event_value()
199 	mutex_lock(&xadc->mutex);  in xadc_write_event_value()
202 	case IIO_EV_INFO_VALUE:  in xadc_write_event_value()
203 		xadc->threshold[offset] = val;  in xadc_write_event_value()
205 	case IIO_EV_INFO_HYSTERESIS:  in xadc_write_event_value()
206 		xadc->temp_hysteresis = val;  in xadc_write_event_value()
209 		mutex_unlock(&xadc->mutex);  in xadc_write_event_value()
210 		return -EINVAL;  in xadc_write_event_value()
213 	if (chan->type == IIO_TEMP) {  in xadc_write_event_value()
215 		 * According to the datasheet we need to set the lower 4 bits to  in xadc_write_event_value()
227 		if (xadc->threshold[offset] < xadc->temp_hysteresis)  in xadc_write_event_value()
228 			xadc->threshold[offset + 4] = 0;  in xadc_write_event_value()
230 			xadc->threshold[offset + 4] = xadc->threshold[offset] -  in xadc_write_event_value()
231 					xadc->temp_hysteresis;  in xadc_write_event_value()
233 			xadc->threshold[offset + 4]);  in xadc_write_event_value()
242 	mutex_unlock(&xadc->mutex);  in xadc_write_event_value()