1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * DA9150 GPADC Driver
20 #include <linux/mfd/da9150/core.h>
21 #include <linux/mfd/da9150/registers.h>
75 	struct da9150 *da9150;  member
86 	struct da9150_gpadc *gpadc = data;  in da9150_gpadc_irq()  local
88 	complete(&gpadc->complete);  in da9150_gpadc_irq()
93 static int da9150_gpadc_read_adc(struct da9150_gpadc *gpadc, int hw_chan)  in da9150_gpadc_read_adc()  argument
98 	mutex_lock(&gpadc->lock);  in da9150_gpadc_read_adc()
101 	da9150_reg_write(gpadc->da9150, DA9150_GPADC_MAN,  in da9150_gpadc_read_adc()
105 	/* Consume left-over completion from a previous timeout */  in da9150_gpadc_read_adc()
106 	try_wait_for_completion(&gpadc->complete);  in da9150_gpadc_read_adc()
109 	wait_for_completion_timeout(&gpadc->complete, msecs_to_jiffies(5));  in da9150_gpadc_read_adc()
112 	da9150_bulk_read(gpadc->da9150, DA9150_GPADC_RES_A, 2, result_regs);  in da9150_gpadc_read_adc()
114 	mutex_unlock(&gpadc->lock);  in da9150_gpadc_read_adc()
118 		dev_err(gpadc->dev, "Timeout on channel %d of GPADC\n",  in da9150_gpadc_read_adc()
120 		return -ETIMEDOUT;  in da9150_gpadc_read_adc()
123 	/* LSBs - 2 bits */  in da9150_gpadc_read_adc()
126 	/* MSBs - 8 bits */  in da9150_gpadc_read_adc()
156 static int da9150_gpadc_read_processed(struct da9150_gpadc *gpadc, int channel,  in da9150_gpadc_read_processed()  argument
161 	raw_val = da9150_gpadc_read_adc(gpadc, hw_chan);  in da9150_gpadc_read_processed()
203 		return -EINVAL;  in da9150_gpadc_read_scale()
215 		*val = -144;  in da9150_gpadc_read_offset()
218 		return -EINVAL;  in da9150_gpadc_read_offset()
226 	struct da9150_gpadc *gpadc = iio_priv(indio_dev);  in da9150_gpadc_read_raw()  local
228 	if ((chan->channel < DA9150_GPADC_CHAN_GPIOA) ||  in da9150_gpadc_read_raw()
229 	    (chan->channel > DA9150_GPADC_CHAN_TJUNC_OVP))  in da9150_gpadc_read_raw()
230 		return -EINVAL;  in da9150_gpadc_read_raw()
235 		return da9150_gpadc_read_processed(gpadc, chan->channel,  in da9150_gpadc_read_raw()
236 						   chan->address, val);  in da9150_gpadc_read_raw()
238 		return da9150_gpadc_read_scale(chan->channel, val, val2);  in da9150_gpadc_read_raw()
240 		return da9150_gpadc_read_offset(chan->channel, val);  in da9150_gpadc_read_raw()
242 		return -EINVAL;  in da9150_gpadc_read_raw()
293 /* Default maps used by da9150-charger */
296 		.consumer_dev_name = "da9150-charger",
301 		.consumer_dev_name = "da9150-charger",
306 		.consumer_dev_name = "da9150-charger",
311 		.consumer_dev_name = "da9150-charger",
320 	struct device *dev = &pdev->dev;  in da9150_gpadc_probe()
321 	struct da9150 *da9150 = dev_get_drvdata(dev->parent);  in da9150_gpadc_probe()  local
322 	struct da9150_gpadc *gpadc;  in da9150_gpadc_probe()  local
326 	indio_dev = devm_iio_device_alloc(dev, sizeof(*gpadc));  in da9150_gpadc_probe()
328 		dev_err(&pdev->dev, "Failed to allocate IIO device\n");  in da9150_gpadc_probe()
329 		return -ENOMEM;  in da9150_gpadc_probe()
331 	gpadc = iio_priv(indio_dev);  in da9150_gpadc_probe()
333 	gpadc->da9150 = da9150;  in da9150_gpadc_probe()
334 	gpadc->dev = dev;  in da9150_gpadc_probe()
335 	mutex_init(&gpadc->lock);  in da9150_gpadc_probe()
336 	init_completion(&gpadc->complete);  in da9150_gpadc_probe()
338 	irq = platform_get_irq_byname(pdev, "GPADC");  in da9150_gpadc_probe()
343 					IRQF_ONESHOT, "GPADC", gpadc);  in da9150_gpadc_probe()
349 	ret = devm_iio_map_array_register(&pdev->dev, indio_dev, da9150_gpadc_default_maps);  in da9150_gpadc_probe()
355 	indio_dev->name = dev_name(dev);  in da9150_gpadc_probe()
356 	indio_dev->info = &da9150_gpadc_info;  in da9150_gpadc_probe()
357 	indio_dev->modes = INDIO_DIRECT_MODE;  in da9150_gpadc_probe()
358 	indio_dev->channels = da9150_gpadc_channels;  in da9150_gpadc_probe()
359 	indio_dev->num_channels = ARRAY_SIZE(da9150_gpadc_channels);  in da9150_gpadc_probe()
361 	return devm_iio_device_register(&pdev->dev, indio_dev);  in da9150_gpadc_probe()
366 		.name = "da9150-gpadc",
373 MODULE_DESCRIPTION("GPADC Driver for DA9150");