input/touchscreen/ads7846.c

29 #include <linux/spi/spi.h>
30 #include <linux/spi/ads7846.h>
99 	struct spi_device	*spi;
235 	dev_vdbg(&ts->spi->dev, "UP\n");
246 		disable_irq(ts->spi->irq);
261 		enable_irq(ts->spi->irq);
284 		dev_err(&ts->spi->dev, "Failed to enable supply: %d\n", error);
354 	struct spi_device *spi = to_spi_device(dev);
412 	status = spi_sync(spi, &req->msg);
429 	struct spi_device *spi = to_spi_device(dev);
448 	status = spi_sync(spi, &req->msg);
469 	ssize_t v = ads7846_read12_ser(&ts->spi->dev, \
549 static int ads784x_hwmon_register(struct spi_device *spi, struct ads7846 *ts)
557 			dev_dbg(&spi->dev, "assuming 2.5V internal vREF\n");
565 			dev_warn(&spi->dev,
573 	hwmon = devm_hwmon_device_register_with_groups(&spi->dev,
574 						       spi->modalias, ts,
581 static inline int ads784x_hwmon_register(struct spi_device *spi,
806 		error = spi_sync(ts->spi, m);
808 			dev_err(&ts->spi->dev, "spi_sync --> %d\n", error);
862 		dev_vdbg(&ts->spi->dev, "ignored %d pressure %d\n",
892 			dev_vdbg(&ts->spi->dev, "DOWN\n");
899 		dev_vdbg(&ts->spi->dev, "%4d/%4d/%4d\n", x, y, Rt);
947 		if (device_may_wakeup(&ts->spi->dev))
948 			enable_irq_wake(ts->spi->irq);
968 		if (device_may_wakeup(&ts->spi->dev))
969 			disable_irq_wake(ts->spi->irq);
982 static int ads7846_setup_pendown(struct spi_device *spi,
995 		ts->gpio_pendown = gpiod_get(&spi->dev, "pendown", GPIOD_IN);
997 			dev_err(&spi->dev, "failed to request pendown GPIO\n");
1025 	time = NSEC_PER_SEC / ts->spi->max_speed_hz;
1061 	packet->tx = devm_kzalloc(&ts->spi->dev, size, GFP_KERNEL);
1065 	packet->rx = devm_kzalloc(&ts->spi->dev, size, GFP_KERNEL);
1174 static int ads7846_probe(struct spi_device *spi)
1178 	struct device *dev = &spi->dev;
1184 	if (!spi->irq) {
1190 	if (spi->max_speed_hz > (125000 * SAMPLE_BITS)) {
1192 			(spi->max_speed_hz/SAMPLE_BITS)/1000);
1201 	spi->bits_per_word = 8;
1202 	spi->mode &= ~SPI_MODE_X_MASK;
1203 	spi->mode |= SPI_MODE_0;
1204 	err = spi_setup(spi);
1220 	spi_set_drvdata(spi, ts);
1223 	ts->spi = spi;
1253 	err = ads7846_setup_pendown(spi, ts, pdata);
1324 	err = devm_request_threaded_irq(dev, spi->irq,
1329 			"trying pin change workaround on irq %d\n", spi->irq);
1331 		err = devm_request_threaded_irq(dev, spi->irq,
1338 		dev_dbg(dev, "irq %d busy?\n", spi->irq);
1342 	err = ads784x_hwmon_register(spi, ts);
1346 	dev_info(dev, "touchscreen, irq %d\n", spi->irq);
1373 static void ads7846_remove(struct spi_device *spi)
1375 	struct ads7846 *ts = spi_get_drvdata(spi);
1395 MODULE_ALIAS("spi:ads7846");