staging: iio: resolver: ad2s1210: add debugfs reg access

This add an implementation of debugfs_reg_access for the AD2S1210
driver.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://lore.kernel.org/r/20230929-ad2s1210-mainline-v3-11-fa4364281745@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
index 0663a51d04ad0808641389cd260e71f9f636427a..31415fbb638460ff4f161602b79367672a88200e 100644 (file)
--- a/drivers/staging/iio/resolver/ad2s1210.c
+++ b/drivers/staging/iio/resolver/ad2s1210.c
@@ -614,9 +614,29 @@ error_ret:
        return ret;
 }
 
+static int ad2s1210_debugfs_reg_access(struct iio_dev *indio_dev,
+                                      unsigned int reg, unsigned int writeval,
+                                      unsigned int *readval)
+{
+       struct ad2s1210_state *st = iio_priv(indio_dev);
+       int ret;
+
+       mutex_lock(&st->lock);
+
+       if (readval)
+               ret = regmap_read(st->regmap, reg, readval);
+       else
+               ret = regmap_write(st->regmap, reg, writeval);
+
+       mutex_unlock(&st->lock);
+
+       return ret;
+}
+
 static const struct iio_info ad2s1210_info = {
        .read_raw = ad2s1210_read_raw,
        .attrs = &ad2s1210_attribute_group,
+       .debugfs_reg_access = &ad2s1210_debugfs_reg_access,
 };
 
 static int ad2s1210_setup_clocks(struct ad2s1210_state *st)