iio: dac: bd79703: Add chip data

Add a chip data structure which allows handling the different variants
(ROHM BD79700, BD79701) with different number of channels.

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://patch.msgid.link/2cacb4bec5455fe1aa58a0b28d2d91b96a396d1a.1743576022.git.mazziesaccount@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/dac/rohm-bd79703.c b/drivers/iio/dac/rohm-bd79703.c
index 236aa98bf00531bcd1495ad90059b24ba2bd0d51..35e1b1134ec6aa1349fff2f754f3abf814dd3473 100644 (file)
--- a/drivers/iio/dac/rohm-bd79703.c
+++ b/drivers/iio/dac/rohm-bd79703.c
@@ -38,11 +38,19 @@ static const struct regmap_config bd79703_regmap_config = {
        .cache_type = REGCACHE_RBTREE,
 };
 
+/* Dynamic driver private data */
 struct bd79703_data {
        struct regmap *regmap;
        int vfs;
 };
 
+/* Static, IC type specific data for different variants */
+struct bd7970x_chip_data {
+       const char *name;
+       const struct iio_chan_spec *channels;
+       int num_channels;
+};
+
 static int bd79703_read_raw(struct iio_dev *idev,
                            struct iio_chan_spec const *chan, int *val,
                            int *val2, long mask)
@@ -94,13 +102,24 @@ static const struct iio_chan_spec bd79703_channels[] = {
        BD79703_CHAN(5),
 };
 
+static const struct bd7970x_chip_data bd79703_chip_data = {
+       .name = "bd79703",
+       .channels = bd79703_channels,
+       .num_channels = ARRAY_SIZE(bd79703_channels),
+};
+
 static int bd79703_probe(struct spi_device *spi)
 {
+       const struct bd7970x_chip_data *cd;
        struct device *dev = &spi->dev;
        struct bd79703_data *data;
        struct iio_dev *idev;
        int ret;
 
+       cd = spi_get_device_match_data(spi);
+       if (!cd)
+               return -ENODEV;
+
        idev = devm_iio_device_alloc(dev, sizeof(*data));
        if (!idev)
                return -ENOMEM;
@@ -121,11 +140,11 @@ static int bd79703_probe(struct spi_device *spi)
                return dev_err_probe(dev, ret, "Failed to get Vfs\n");
 
        data->vfs = ret;
-       idev->channels = bd79703_channels;
-       idev->num_channels = ARRAY_SIZE(bd79703_channels);
+       idev->channels = cd->channels;
+       idev->num_channels = cd->num_channels;
        idev->modes = INDIO_DIRECT_MODE;
        idev->info = &bd79703_info;
-       idev->name = "bd79703";
+       idev->name = cd->name;
 
        /* Initialize all to output zero */
        ret = regmap_write(data->regmap, BD79703_REG_OUT_ALL, 0);
@@ -136,13 +155,13 @@ static int bd79703_probe(struct spi_device *spi)
 }
 
 static const struct spi_device_id bd79703_id[] = {
-       { "bd79703", },
+       { "bd79703", (kernel_ulong_t)&bd79703_chip_data },
        { }
 };
 MODULE_DEVICE_TABLE(spi, bd79703_id);
 
 static const struct of_device_id bd79703_of_match[] = {
-       { .compatible = "rohm,bd79703", },
+       { .compatible = "rohm,bd79703", .data = &bd79703_chip_data },
        { }
 };
 MODULE_DEVICE_TABLE(of, bd79703_of_match);