7 #include <linux/iio/adc-helpers.h>
49 static void rzt2h_adc_start(struct rzt2h_adc *adc, unsigned int conversion_type)  in rzt2h_adc_start()  argument
53 	reg = readw(adc->base + RZT2H_ADCSR_REG);  in rzt2h_adc_start()
61 	writew(reg, adc->base + RZT2H_ADCSR_REG);  in rzt2h_adc_start()
64 static void rzt2h_adc_stop(struct rzt2h_adc *adc)  in rzt2h_adc_stop()  argument
68 	reg = readw(adc->base + RZT2H_ADCSR_REG);  in rzt2h_adc_stop()
73 	writew(reg, adc->base + RZT2H_ADCSR_REG);  in rzt2h_adc_stop()
76 static int rzt2h_adc_read_single(struct rzt2h_adc *adc, unsigned int ch, int *val)  in rzt2h_adc_read_single()  argument
80 	ret = pm_runtime_resume_and_get(adc->dev);  in rzt2h_adc_read_single()
84 	mutex_lock(&adc->lock);  in rzt2h_adc_read_single()
86 	reinit_completion(&adc->completion);  in rzt2h_adc_read_single()
89 	writew(RZT2H_ADANSA0_CH_MASK(ch), adc->base + RZT2H_ADANSA0_REG);  in rzt2h_adc_read_single()
91 	rzt2h_adc_start(adc, RZT2H_ADCSR_ADCS_SINGLE);  in rzt2h_adc_read_single()
97 	ret = wait_for_completion_timeout(&adc->completion, usecs_to_jiffies(1));  in rzt2h_adc_read_single()
103 	*val = readw(adc->base + RZT2H_ADDR_REG(ch));  in rzt2h_adc_read_single()
107 	rzt2h_adc_stop(adc);  in rzt2h_adc_read_single()
109 	mutex_unlock(&adc->lock);  in rzt2h_adc_read_single()
111 	pm_runtime_put_autosuspend(adc->dev);  in rzt2h_adc_read_single()
116 static void rzt2h_adc_set_cal(struct rzt2h_adc *adc, bool cal)  in rzt2h_adc_set_cal()  argument
120 	val = readw(adc->base + RZT2H_ADCALCTL_REG);  in rzt2h_adc_set_cal()
126 	writew(val, adc->base + RZT2H_ADCALCTL_REG);  in rzt2h_adc_set_cal()
129 static int rzt2h_adc_calibrate(struct rzt2h_adc *adc)  in rzt2h_adc_calibrate()  argument
134 	rzt2h_adc_set_cal(adc, true);  in rzt2h_adc_calibrate()
137 				200, 1000, true, adc->base + RZT2H_ADCALCTL_REG);  in rzt2h_adc_calibrate()
139 		dev_err(adc->dev, "Calibration timed out: %d\n", ret);  in rzt2h_adc_calibrate()
143 	rzt2h_adc_set_cal(adc, false);  in rzt2h_adc_calibrate()
146 		dev_err(adc->dev, "Calibration failed\n");  in rzt2h_adc_calibrate()
157 	struct rzt2h_adc *adc = iio_priv(indio_dev);  in rzt2h_adc_read_raw()  local
161 		return rzt2h_adc_read_single(adc, chan->channel, val);  in rzt2h_adc_read_raw()
177 	struct rzt2h_adc *adc = private;  in rzt2h_adc_isr()  local
179 	complete(&adc->completion);  in rzt2h_adc_isr()
191 static int rzt2h_adc_parse_properties(struct rzt2h_adc *adc)  in rzt2h_adc_parse_properties()  argument
197 	ret = devm_iio_adc_device_alloc_chaninfo_se(adc->dev,  in rzt2h_adc_parse_properties()
202 		return dev_err_probe(adc->dev, ret, "Failed to read channel info");  in rzt2h_adc_parse_properties()
204 	adc->num_channels = ret;  in rzt2h_adc_parse_properties()
205 	adc->channels = chan_array;  in rzt2h_adc_parse_properties()
207 	for (i = 0; i < adc->num_channels; i++)  in rzt2h_adc_parse_properties()
208 		if (chan_array[i].channel + 1 > adc->max_channels)  in rzt2h_adc_parse_properties()
209 			adc->max_channels = chan_array[i].channel + 1;  in rzt2h_adc_parse_properties()
218 	struct rzt2h_adc *adc;  in rzt2h_adc_probe()  local
221 	indio_dev = devm_iio_device_alloc(dev, sizeof(*adc));  in rzt2h_adc_probe()
225 	adc = iio_priv(indio_dev);  in rzt2h_adc_probe()
226 	adc->dev = dev;  in rzt2h_adc_probe()
227 	init_completion(&adc->completion);  in rzt2h_adc_probe()
229 	ret = devm_mutex_init(dev, &adc->lock);  in rzt2h_adc_probe()
233 	platform_set_drvdata(pdev, adc);  in rzt2h_adc_probe()
235 	ret = rzt2h_adc_parse_properties(adc);  in rzt2h_adc_probe()
239 	adc->base = devm_platform_ioremap_resource(pdev, 0);  in rzt2h_adc_probe()
240 	if (IS_ERR(adc->base))  in rzt2h_adc_probe()
241 		return PTR_ERR(adc->base);  in rzt2h_adc_probe()
253 	ret = devm_request_irq(dev, irq, rzt2h_adc_isr, 0, dev_name(dev), adc);  in rzt2h_adc_probe()
257 	indio_dev->name = "rzt2h-adc";  in rzt2h_adc_probe()
260 	indio_dev->channels = adc->channels;  in rzt2h_adc_probe()
261 	indio_dev->num_channels = adc->num_channels;  in rzt2h_adc_probe()
267 	{ .compatible = "renesas,r9a09g077-adc" },
274 	struct rzt2h_adc *adc = dev_get_drvdata(dev);  in rzt2h_adc_pm_runtime_resume()  local
283 	return rzt2h_adc_calibrate(adc);  in rzt2h_adc_pm_runtime_resume()
293 		.name		= "rzt2h-adc",
302 MODULE_DESCRIPTION("Renesas RZ/T2H / RZ/N2H ADC driver");