v4.19.13 snapshot.
diff --git a/drivers/input/touchscreen/tsc2007_iio.c b/drivers/input/touchscreen/tsc2007_iio.c
new file mode 100644
index 0000000..e27a956
--- /dev/null
+++ b/drivers/input/touchscreen/tsc2007_iio.c
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2016 Golden Delicious Comp. GmbH&Co. KG
+ * Nikolaus Schaller <hns@goldelico.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include "tsc2007.h"
+
+struct tsc2007_iio {
+ struct tsc2007 *ts;
+};
+
+#define TSC2007_CHAN_IIO(_chan, _name, _type, _chan_info) \
+{ \
+ .datasheet_name = _name, \
+ .type = _type, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(_chan_info), \
+ .indexed = 1, \
+ .channel = _chan, \
+}
+
+static const struct iio_chan_spec tsc2007_iio_channel[] = {
+ TSC2007_CHAN_IIO(0, "x", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
+ TSC2007_CHAN_IIO(1, "y", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
+ TSC2007_CHAN_IIO(2, "z1", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
+ TSC2007_CHAN_IIO(3, "z2", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
+ TSC2007_CHAN_IIO(4, "adc", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
+ TSC2007_CHAN_IIO(5, "rt", IIO_VOLTAGE, IIO_CHAN_INFO_RAW), /* Ohms? */
+ TSC2007_CHAN_IIO(6, "pen", IIO_PRESSURE, IIO_CHAN_INFO_RAW),
+ TSC2007_CHAN_IIO(7, "temp0", IIO_TEMP, IIO_CHAN_INFO_RAW),
+ TSC2007_CHAN_IIO(8, "temp1", IIO_TEMP, IIO_CHAN_INFO_RAW),
+};
+
+static int tsc2007_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct tsc2007_iio *iio = iio_priv(indio_dev);
+ struct tsc2007 *tsc = iio->ts;
+ int adc_chan = chan->channel;
+ int ret = 0;
+
+ if (adc_chan >= ARRAY_SIZE(tsc2007_iio_channel))
+ return -EINVAL;
+
+ if (mask != IIO_CHAN_INFO_RAW)
+ return -EINVAL;
+
+ mutex_lock(&tsc->mlock);
+
+ switch (chan->channel) {
+ case 0:
+ *val = tsc2007_xfer(tsc, READ_X);
+ break;
+ case 1:
+ *val = tsc2007_xfer(tsc, READ_Y);
+ break;
+ case 2:
+ *val = tsc2007_xfer(tsc, READ_Z1);
+ break;
+ case 3:
+ *val = tsc2007_xfer(tsc, READ_Z2);
+ break;
+ case 4:
+ *val = tsc2007_xfer(tsc, (ADC_ON_12BIT | TSC2007_MEASURE_AUX));
+ break;
+ case 5: {
+ struct ts_event tc;
+
+ tc.x = tsc2007_xfer(tsc, READ_X);
+ tc.z1 = tsc2007_xfer(tsc, READ_Z1);
+ tc.z2 = tsc2007_xfer(tsc, READ_Z2);
+ *val = tsc2007_calculate_resistance(tsc, &tc);
+ break;
+ }
+ case 6:
+ *val = tsc2007_is_pen_down(tsc);
+ break;
+ case 7:
+ *val = tsc2007_xfer(tsc,
+ (ADC_ON_12BIT | TSC2007_MEASURE_TEMP0));
+ break;
+ case 8:
+ *val = tsc2007_xfer(tsc,
+ (ADC_ON_12BIT | TSC2007_MEASURE_TEMP1));
+ break;
+ }
+
+ /* Prepare for next touch reading - power down ADC, enable PENIRQ */
+ tsc2007_xfer(tsc, PWRDOWN);
+
+ mutex_unlock(&tsc->mlock);
+
+ ret = IIO_VAL_INT;
+
+ return ret;
+}
+
+static const struct iio_info tsc2007_iio_info = {
+ .read_raw = tsc2007_read_raw,
+};
+
+int tsc2007_iio_configure(struct tsc2007 *ts)
+{
+ struct iio_dev *indio_dev;
+ struct tsc2007_iio *iio;
+ int error;
+
+ indio_dev = devm_iio_device_alloc(&ts->client->dev, sizeof(*iio));
+ if (!indio_dev) {
+ dev_err(&ts->client->dev, "iio_device_alloc failed\n");
+ return -ENOMEM;
+ }
+
+ iio = iio_priv(indio_dev);
+ iio->ts = ts;
+
+ indio_dev->name = "tsc2007";
+ indio_dev->dev.parent = &ts->client->dev;
+ indio_dev->info = &tsc2007_iio_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = tsc2007_iio_channel;
+ indio_dev->num_channels = ARRAY_SIZE(tsc2007_iio_channel);
+
+ error = devm_iio_device_register(&ts->client->dev, indio_dev);
+ if (error) {
+ dev_err(&ts->client->dev,
+ "iio_device_register() failed: %d\n", error);
+ return error;
+ }
+
+ return 0;
+}