86 static int as3935_read(struct as3935_state *st, unsigned int reg, int *val)  in as3935_read()  argument
92 	ret = spi_w8r8(st->spi, cmd);  in as3935_read()
100 static int as3935_write(struct as3935_state *st,  in as3935_write()  argument
104 	u8 *buf = st->buf;  in as3935_write()
109 	return spi_write(st->spi, buf, 2);  in as3935_write()
116 	struct as3935_state *st = iio_priv(dev_to_iio_dev(dev));  in as3935_sensor_sensitivity_show()  local
119 	ret = as3935_read(st, AS3935_AFE_GAIN, &val);  in as3935_sensor_sensitivity_show()
131 	struct as3935_state *st = iio_priv(dev_to_iio_dev(dev));  in as3935_sensor_sensitivity_store()  local
142 	as3935_write(st, AS3935_AFE_GAIN, val << 1);  in as3935_sensor_sensitivity_store()
166 	struct as3935_state *st = iio_priv(indio_dev);  in as3935_read_raw()  local
174 		ret = as3935_read(st, AS3935_DATA, val);  in as3935_read_raw()
203 	struct as3935_state *st = iio_priv(indio_dev);  in as3935_trigger_handler()  local
206 	ret = as3935_read(st, AS3935_DATA, &val);  in as3935_trigger_handler()
225 	struct as3935_state *st;  in as3935_event_work()  local
228 	st = container_of(work, struct as3935_state, work.work);  in as3935_event_work()
230 	as3935_read(st, AS3935_INT, &val);  in as3935_event_work()
235 		iio_trigger_poll(st->trig);  in as3935_event_work()
238 		dev_warn(&st->spi->dev, "noise level is too high");  in as3935_event_work()
246 	struct as3935_state *st = iio_priv(indio_dev);  in as3935_interrupt_handler()  local
253 	schedule_delayed_work(&st->work, msecs_to_jiffies(3));  in as3935_interrupt_handler()
258 static void calibrate_as3935(struct as3935_state *st)  in calibrate_as3935()  argument
260 	mutex_lock(&st->lock);  in calibrate_as3935()
263 	as3935_write(st, AS3935_INT, BIT(5));  in calibrate_as3935()
265 	as3935_write(st, AS3935_CALIBRATE, 0x96);  in calibrate_as3935()
266 	as3935_write(st, AS3935_TUNE_CAP,  in calibrate_as3935()
267 		BIT(5) | (st->tune_cap / TUNE_CAP_DIV));  in calibrate_as3935()
270 	as3935_write(st, AS3935_TUNE_CAP, (st->tune_cap / TUNE_CAP_DIV));  in calibrate_as3935()
272 	mutex_unlock(&st->lock);  in calibrate_as3935()
279 	struct as3935_state *st = iio_priv(indio_dev);  in as3935_suspend()  local
282 	mutex_lock(&st->lock);  in as3935_suspend()
283 	ret = as3935_read(st, AS3935_AFE_GAIN, &val);  in as3935_suspend()
288 	ret = as3935_write(st, AS3935_AFE_GAIN, val);  in as3935_suspend()
291 	mutex_unlock(&st->lock);  in as3935_suspend()
299 	struct as3935_state *st = iio_priv(indio_dev);  in as3935_resume()  local
302 	mutex_lock(&st->lock);  in as3935_resume()
303 	ret = as3935_read(st, AS3935_AFE_GAIN, &val);  in as3935_resume()
307 	ret = as3935_write(st, AS3935_AFE_GAIN, val);  in as3935_resume()
310 	mutex_unlock(&st->lock);  in as3935_resume()
326 	struct as3935_state *st;  in as3935_probe()  local
336 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in as3935_probe()
340 	st = iio_priv(indio_dev);  in as3935_probe()
341 	st->spi = spi;  in as3935_probe()
342 	st->tune_cap = 0;  in as3935_probe()
345 	mutex_init(&st->lock);  in as3935_probe()
346 	INIT_DELAYED_WORK(&st->work, as3935_event_work);  in as3935_probe()
349 			"ams,tuning-capacitor-pf", &st->tune_cap);  in as3935_probe()
351 		st->tune_cap = 0;  in as3935_probe()
354 			st->tune_cap);  in as3935_probe()
357 	if (st->tune_cap > MAX_PF_CAP) {  in as3935_probe()
360 			st->tune_cap);  in as3935_probe()
377 	st->trig = trig;  in as3935_probe()
396 	calibrate_as3935(st);  in as3935_probe()
420 	iio_trigger_unregister(st->trig);  in as3935_probe()
428 	struct as3935_state *st = iio_priv(indio_dev);  in as3935_remove()  local
432 	iio_trigger_unregister(st->trig);  in as3935_remove()