117 static int iadc_read(struct iadc_chip *iadc, u16 offset, u8 *data)  in iadc_read()  argument
122 	ret = regmap_read(iadc->regmap, iadc->base + offset, &val);  in iadc_read()
130 static int iadc_write(struct iadc_chip *iadc, u16 offset, u8 data)  in iadc_write()  argument
132 	return regmap_write(iadc->regmap, iadc->base + offset, data);  in iadc_write()
135 static int iadc_reset(struct iadc_chip *iadc)  in iadc_reset()  argument
140 	ret = iadc_write(iadc, IADC_SEC_ACCESS, IADC_SEC_ACCESS_DATA);  in iadc_reset()
144 	ret = iadc_read(iadc, IADC_PERH_RESET_CTL3, &data);  in iadc_reset()
148 	ret = iadc_write(iadc, IADC_SEC_ACCESS, IADC_SEC_ACCESS_DATA);  in iadc_reset()
154 	return iadc_write(iadc, IADC_PERH_RESET_CTL3, data);  in iadc_reset()
157 static int iadc_set_state(struct iadc_chip *iadc, bool state)  in iadc_set_state()  argument
159 	return iadc_write(iadc, IADC_EN_CTL1, state ? IADC_EN_CTL1_SET : 0);  in iadc_set_state()
162 static void iadc_status_show(struct iadc_chip *iadc)  in iadc_status_show()  argument
167 	ret = iadc_read(iadc, IADC_MODE_CTL, &mode);  in iadc_status_show()
171 	ret = iadc_read(iadc, IADC_DIG_PARAM, &dig);  in iadc_status_show()
175 	ret = iadc_read(iadc, IADC_CH_SEL_CTL, &chan);  in iadc_status_show()
179 	ret = iadc_read(iadc, IADC_CONV_REQ, &req);  in iadc_status_show()
183 	ret = iadc_read(iadc, IADC_STATUS1, &sta1);  in iadc_status_show()
187 	ret = iadc_read(iadc, IADC_EN_CTL1, &en);  in iadc_status_show()
191 	dev_err(iadc->dev,  in iadc_status_show()
196 static int iadc_configure(struct iadc_chip *iadc, int channel)  in iadc_configure()  argument
203 	ret = iadc_write(iadc, IADC_MODE_CTL, mode);  in iadc_configure()
208 	ret = iadc_write(iadc, IADC_CH_SEL_CTL, channel);  in iadc_configure()
214 	ret = iadc_write(iadc, IADC_DIG_PARAM, decim);  in iadc_configure()
219 	ret = iadc_write(iadc, IADC_HW_SETTLE_DELAY, IADC_DEF_HW_SETTLE_TIME);  in iadc_configure()
223 	ret = iadc_write(iadc, IADC_FAST_AVG_CTL, IADC_DEF_AVG_SAMPLES);  in iadc_configure()
228 		ret = iadc_write(iadc, IADC_FAST_AVG_EN, IADC_FAST_AVG_EN_SET);  in iadc_configure()
230 		ret = iadc_write(iadc, IADC_FAST_AVG_EN, 0);  in iadc_configure()
235 	if (!iadc->poll_eoc)  in iadc_configure()
236 		reinit_completion(&iadc->complete);  in iadc_configure()
238 	ret = iadc_set_state(iadc, true);  in iadc_configure()
243 	return iadc_write(iadc, IADC_CONV_REQ, IADC_CONV_REQ_SET);  in iadc_configure()
246 static int iadc_poll_wait_eoc(struct iadc_chip *iadc, unsigned int interval_us)  in iadc_poll_wait_eoc()  argument
255 		ret = iadc_read(iadc, IADC_STATUS1, &sta1);  in iadc_poll_wait_eoc()
266 	iadc_status_show(iadc);  in iadc_poll_wait_eoc()
271 static int iadc_read_result(struct iadc_chip *iadc, u16 *data)  in iadc_read_result()  argument
273 	return regmap_bulk_read(iadc->regmap, iadc->base + IADC_DATA, data, 2);  in iadc_read_result()
276 static int iadc_do_conversion(struct iadc_chip *iadc, int chan, u16 *data)  in iadc_do_conversion()  argument
281 	ret = iadc_configure(iadc, chan);  in iadc_do_conversion()
287 	if (iadc->poll_eoc) {  in iadc_do_conversion()
288 		ret = iadc_poll_wait_eoc(iadc, wait);  in iadc_do_conversion()
290 		ret = wait_for_completion_timeout(&iadc->complete,  in iadc_do_conversion()
296 			ret = iadc_poll_wait_eoc(iadc, IADC_CONV_TIME_MIN_US);  in iadc_do_conversion()
300 		ret = iadc_read_result(iadc, data);  in iadc_do_conversion()
302 	iadc_set_state(iadc, false);  in iadc_do_conversion()
304 		dev_err(iadc->dev, "conversion failed\n");  in iadc_do_conversion()
313 	struct iadc_chip *iadc = iio_priv(indio_dev);  in iadc_read_raw()  local
320 		mutex_lock(&iadc->lock);  in iadc_read_raw()
321 		ret = iadc_do_conversion(iadc, chan->channel, &adc_raw);  in iadc_read_raw()
322 		mutex_unlock(&iadc->lock);  in iadc_read_raw()
326 		vsense_raw = adc_raw - iadc->offset[chan->channel];  in iadc_read_raw()
329 		vsense_uv /= (s32)iadc->gain - iadc->offset[chan->channel];  in iadc_read_raw()
331 		isense_ua = vsense_uv / iadc->rsense[chan->channel];  in iadc_read_raw()
333 		dev_dbg(iadc->dev, "off %d gain %d adc %d %duV I %duA\n",  in iadc_read_raw()
334 			iadc->offset[chan->channel], iadc->gain,  in iadc_read_raw()
354 	struct iadc_chip *iadc = dev_id;  in iadc_isr()  local
356 	complete(&iadc->complete);  in iadc_isr()
361 static int iadc_update_offset(struct iadc_chip *iadc)  in iadc_update_offset()  argument
365 	ret = iadc_do_conversion(iadc, IADC_GAIN_17P857MV, &iadc->gain);  in iadc_update_offset()
369 	ret = iadc_do_conversion(iadc, IADC_INT_OFFSET_CSP2_CSN2,  in iadc_update_offset()
370 				 &iadc->offset[IADC_INT_RSENSE]);  in iadc_update_offset()
374 	if (iadc->gain == iadc->offset[IADC_INT_RSENSE]) {  in iadc_update_offset()
375 		dev_err(iadc->dev, "error: internal offset == gain %d\n",  in iadc_update_offset()
376 			iadc->gain);  in iadc_update_offset()
380 	ret = iadc_do_conversion(iadc, IADC_EXT_OFFSET_CSP_CSN,  in iadc_update_offset()
381 				 &iadc->offset[IADC_EXT_RSENSE]);  in iadc_update_offset()
385 	if (iadc->gain == iadc->offset[IADC_EXT_RSENSE]) {  in iadc_update_offset()
386 		dev_err(iadc->dev, "error: external offset == gain %d\n",  in iadc_update_offset()
387 			iadc->gain);  in iadc_update_offset()
394 static int iadc_version_check(struct iadc_chip *iadc)  in iadc_version_check()  argument
399 	ret = iadc_read(iadc, IADC_PERPH_TYPE, &val);  in iadc_version_check()
404 		dev_err(iadc->dev, "%d is not ADC\n", val);  in iadc_version_check()
408 	ret = iadc_read(iadc, IADC_PERPH_SUBTYPE, &val);  in iadc_version_check()
413 		dev_err(iadc->dev, "%d is not IADC\n", val);  in iadc_version_check()
417 	ret = iadc_read(iadc, IADC_REVISION2, &val);  in iadc_version_check()
422 		dev_err(iadc->dev, "revision %d not supported\n", val);  in iadc_version_check()
429 static int iadc_rsense_read(struct iadc_chip *iadc, struct device_node *node)  in iadc_rsense_read()  argument
435 				   &iadc->rsense[IADC_EXT_RSENSE]);  in iadc_rsense_read()
437 		iadc->rsense[IADC_EXT_RSENSE] = IADC_INT_RSENSE_IDEAL_VALUE;  in iadc_rsense_read()
439 	if (!iadc->rsense[IADC_EXT_RSENSE]) {  in iadc_rsense_read()
440 		dev_err(iadc->dev, "external resistor can't be zero Ohms");  in iadc_rsense_read()
444 	ret = iadc_read(iadc, IADC_NOMINAL_RSENSE, &deviation);  in iadc_rsense_read()
461 	iadc->rsense[IADC_INT_RSENSE] = int_sense;  in iadc_rsense_read()
489 	struct iadc_chip *iadc;  in iadc_probe()  local
493 	indio_dev = devm_iio_device_alloc(dev, sizeof(*iadc));  in iadc_probe()
497 	iadc = iio_priv(indio_dev);  in iadc_probe()
498 	iadc->dev = dev;  in iadc_probe()
500 	iadc->regmap = dev_get_regmap(dev->parent, NULL);  in iadc_probe()
501 	if (!iadc->regmap)  in iadc_probe()
504 	init_completion(&iadc->complete);  in iadc_probe()
505 	mutex_init(&iadc->lock);  in iadc_probe()
511 	iadc->base = res;  in iadc_probe()
513 	ret = iadc_version_check(iadc);  in iadc_probe()
517 	ret = iadc_rsense_read(iadc, node);  in iadc_probe()
521 	dev_dbg(iadc->dev, "sense resistors %d and %d micro Ohm\n",  in iadc_probe()
522 		iadc->rsense[IADC_INT_RSENSE],  in iadc_probe()
523 		iadc->rsense[IADC_EXT_RSENSE]);  in iadc_probe()
530 		iadc->poll_eoc = true;  in iadc_probe()
532 	ret = iadc_reset(iadc);  in iadc_probe()
538 	if (!iadc->poll_eoc) {  in iadc_probe()
540 					"spmi-iadc", iadc);  in iadc_probe()
546 		device_init_wakeup(iadc->dev, 1);  in iadc_probe()
549 	ret = iadc_update_offset(iadc);  in iadc_probe()