10 #include <linux/iio/adc/qcom-vadc-common.h>
104  * struct adc5_channel_prop - ADC channel property.
113  * @avg_samples: ability to provide single result from the ADC
133  * struct adc5_chip - ADC private structure.
136  * @base: base address for the ADC peripheral.
137  * @nchannels: number of ADC channels.
138  * @chan_props: array of ADC channel properties.
141  * @complete: ADC result notification after interrupt is received.
142  * @lock: ADC lock for access to the peripheral.
158 static int adc5_read(struct adc5_chip *adc, u16 offset, u8 *data, int len)  in adc5_read()  argument
160 	return regmap_bulk_read(adc->regmap, adc->base + offset, data, len);  in adc5_read()
163 static int adc5_write(struct adc5_chip *adc, u16 offset, u8 *data, int len)  in adc5_write()  argument
165 	return regmap_bulk_write(adc->regmap, adc->base + offset, data, len);  in adc5_write()
168 static int adc5_masked_write(struct adc5_chip *adc, u16 offset, u8 mask, u8 val)  in adc5_masked_write()  argument
170 	return regmap_update_bits(adc->regmap, adc->base + offset, mask, val);  in adc5_masked_write()
173 static int adc5_read_voltage_data(struct adc5_chip *adc, u16 *data)  in adc5_read_voltage_data()  argument
178 	ret = adc5_read(adc, ADC5_USR_DATA0, &rslt_lsb, sizeof(rslt_lsb));  in adc5_read_voltage_data()
182 	ret = adc5_read(adc, ADC5_USR_DATA1, &rslt_msb, sizeof(rslt_lsb));  in adc5_read_voltage_data()
189 		dev_err(adc->dev, "Invalid data:0x%x\n", *data);  in adc5_read_voltage_data()
193 	dev_dbg(adc->dev, "voltage raw code:0x%x\n", *data);  in adc5_read_voltage_data()
198 static int adc5_poll_wait_eoc(struct adc5_chip *adc)  in adc5_poll_wait_eoc()  argument
205 		ret = adc5_read(adc, ADC5_USR_STATUS1, &status1,  in adc5_poll_wait_eoc()
220 static void adc5_update_dig_param(struct adc5_chip *adc,  in adc5_update_dig_param()  argument
236 static int adc5_configure(struct adc5_chip *adc,  in adc5_configure()  argument
243 	ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));  in adc5_configure()
248 	adc5_update_dig_param(adc, prop, &buf[0]);  in adc5_configure()
254 	/* Select ADC channel */  in adc5_configure()
261 	/* Select ADC enable */  in adc5_configure()
267 	if (!adc->poll_eoc)  in adc5_configure()
268 		reinit_completion(&adc->complete);  in adc5_configure()
270 	return adc5_write(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));  in adc5_configure()
273 static int adc7_configure(struct adc5_chip *adc,  in adc7_configure()  argument
279 	ret = adc5_masked_write(adc, ADC_APP_SID, ADC_APP_SID_MASK, prop->sid);  in adc7_configure()
283 	ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));  in adc7_configure()
288 	adc5_update_dig_param(adc, prop, &buf[0]);  in adc7_configure()
294 	/* Select ADC channel */  in adc7_configure()
304 	if (!adc->poll_eoc)  in adc7_configure()
305 		reinit_completion(&adc->complete);  in adc7_configure()
307 	ret = adc5_write(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));  in adc7_configure()
311 	return adc5_write(adc, ADC5_USR_CONV_REQ, &conv_req, 1);  in adc7_configure()
314 static int adc5_do_conversion(struct adc5_chip *adc,  in adc5_do_conversion()  argument
321 	mutex_lock(&adc->lock);  in adc5_do_conversion()
323 	ret = adc5_configure(adc, prop);  in adc5_do_conversion()
325 		dev_err(adc->dev, "ADC configure failed with %d\n", ret);  in adc5_do_conversion()
329 	if (adc->poll_eoc) {  in adc5_do_conversion()
330 		ret = adc5_poll_wait_eoc(adc);  in adc5_do_conversion()
332 			dev_err(adc->dev, "EOC bit not set\n");  in adc5_do_conversion()
336 		ret = wait_for_completion_timeout(&adc->complete,  in adc5_do_conversion()
339 			dev_dbg(adc->dev, "Did not get completion timeout.\n");  in adc5_do_conversion()
340 			ret = adc5_poll_wait_eoc(adc);  in adc5_do_conversion()
342 				dev_err(adc->dev, "EOC bit not set\n");  in adc5_do_conversion()
348 	ret = adc5_read_voltage_data(adc, data_volt);  in adc5_do_conversion()
350 	mutex_unlock(&adc->lock);  in adc5_do_conversion()
355 static int adc7_do_conversion(struct adc5_chip *adc,  in adc7_do_conversion()  argument
363 	mutex_lock(&adc->lock);  in adc7_do_conversion()
365 	ret = adc7_configure(adc, prop);  in adc7_do_conversion()
367 		dev_err(adc->dev, "ADC configure failed with %d\n", ret);  in adc7_do_conversion()
372 	wait_for_completion_timeout(&adc->complete, ADC7_CONV_TIMEOUT);  in adc7_do_conversion()
374 	ret = adc5_read(adc, ADC5_USR_STATUS1, &status, 1);  in adc7_do_conversion()
379 		dev_err(adc->dev, "Unexpected conversion fault\n");  in adc7_do_conversion()
384 	ret = adc5_read_voltage_data(adc, data_volt);  in adc7_do_conversion()
387 	mutex_unlock(&adc->lock);  in adc7_do_conversion()
392 typedef int (*adc_do_conversion)(struct adc5_chip *adc,
399 	struct adc5_chip *adc = dev_id;  in adc5_isr()  local
401 	complete(&adc->complete);  in adc5_isr()
409 	struct adc5_chip *adc = iio_priv(indio_dev);  in adc5_fwnode_xlate()  local
412 	for (i = 0; i < adc->nchannels; i++)  in adc5_fwnode_xlate()
413 		if (adc->chan_props[i].channel == iiospec->args[0])  in adc5_fwnode_xlate()
422 	struct adc5_chip *adc = iio_priv(indio_dev);  in adc7_fwnode_xlate()  local
425 	for (i = 0; i < adc->nchannels; i++) {  in adc7_fwnode_xlate()
426 		v_channel = (adc->chan_props[i].sid << ADC_CHANNEL_OFFSET) |  in adc7_fwnode_xlate()
427 			adc->chan_props[i].channel;  in adc7_fwnode_xlate()
439 	struct adc5_chip *adc = iio_priv(indio_dev);  in adc_read_raw_common()  local
444 	prop = &adc->chan_props[chan->address];  in adc_read_raw_common()
448 		ret = do_conv(adc, prop, chan,  in adc_read_raw_common()
455 			adc->data,  in adc_read_raw_common()
624 static int adc5_get_fw_channel_data(struct adc5_chip *adc,  in adc5_get_fw_channel_data()  argument
633 	struct device *dev = adc->dev;  in adc5_get_fw_channel_data()
645 	if (adc->data->info == &adc7_info) {  in adc5_get_fw_channel_data()
690 			adc->data->adc_chans[prop->channel].prescale_index;  in adc5_get_fw_channel_data()
697 		ret = adc5_read(adc, ADC5_USR_REVISION1, dig_version,  in adc5_get_fw_channel_data()
709 			adc->data->info == &adc7_info)  in adc5_get_fw_channel_data()
805 		.compatible = "qcom,spmi-adc-rev2",
812 static int adc5_get_fw_data(struct adc5_chip *adc)  in adc5_get_fw_data()  argument
821 	adc->nchannels = device_get_child_node_count(adc->dev);  in adc5_get_fw_data()
822 	if (!adc->nchannels)  in adc5_get_fw_data()
825 	adc->iio_chans = devm_kcalloc(adc->dev, adc->nchannels,  in adc5_get_fw_data()
826 				       sizeof(*adc->iio_chans), GFP_KERNEL);  in adc5_get_fw_data()
827 	if (!adc->iio_chans)  in adc5_get_fw_data()
830 	adc->chan_props = devm_kcalloc(adc->dev, adc->nchannels,  in adc5_get_fw_data()
831 					sizeof(*adc->chan_props), GFP_KERNEL);  in adc5_get_fw_data()
832 	if (!adc->chan_props)  in adc5_get_fw_data()
835 	chan_props = adc->chan_props;  in adc5_get_fw_data()
836 	iio_chan = adc->iio_chans;  in adc5_get_fw_data()
837 	adc->data = device_get_match_data(adc->dev);  in adc5_get_fw_data()
838 	if (!adc->data)  in adc5_get_fw_data()
839 		adc->data = &adc5_data_pmic;  in adc5_get_fw_data()
841 	device_for_each_child_node(adc->dev, child) {  in adc5_get_fw_data()
842 		ret = adc5_get_fw_channel_data(adc, &prop, child, adc->data);  in adc5_get_fw_data()
849 			adc->data->adc_chans[prop.channel].scale_fn_type;  in adc5_get_fw_data()
851 		adc_chan = &adc->data->adc_chans[prop.channel];  in adc5_get_fw_data()
871 	struct adc5_chip *adc;  in adc5_probe()  local
884 	indio_dev = devm_iio_device_alloc(dev, sizeof(*adc));  in adc5_probe()
888 	adc = iio_priv(indio_dev);  in adc5_probe()
889 	adc->regmap = regmap;  in adc5_probe()
890 	adc->dev = dev;  in adc5_probe()
891 	adc->base = reg;  in adc5_probe()
893 	init_completion(&adc->complete);  in adc5_probe()
894 	mutex_init(&adc->lock);  in adc5_probe()
896 	ret = adc5_get_fw_data(adc);  in adc5_probe()
898 		dev_err(dev, "adc get dt data failed\n");  in adc5_probe()
906 		adc->poll_eoc = true;  in adc5_probe()
909 				       "pm-adc5", adc);  in adc5_probe()
916 	indio_dev->info = adc->data->info;  in adc5_probe()
917 	indio_dev->channels = adc->iio_chans;  in adc5_probe()
918 	indio_dev->num_channels = adc->nchannels;  in adc5_probe()
933 MODULE_DESCRIPTION("Qualcomm Technologies Inc. PMIC5 ADC driver");