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Subject[PATCH v7 3/7] IIO: Ingenic JZ47xx: Add xlate cb to retrieve correct channel idx
Date
Provide an of_xlate callback in order to retrieve the correct channel
specifier index from the IIO channels array.

Signed-off-by: Artur Rojek <contact@artur-rojek.eu>
Tested-by: Paul Cercueil <paul@crapouillou.net>
---

Changes:

v2-v7: no change

drivers/iio/adc/ingenic-adc.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/drivers/iio/adc/ingenic-adc.c b/drivers/iio/adc/ingenic-adc.c
index 6c3bbba7c44b..0eee4b4fb96c 100644
--- a/drivers/iio/adc/ingenic-adc.c
+++ b/drivers/iio/adc/ingenic-adc.c
@@ -400,6 +400,21 @@ static int ingenic_adc_read_raw(struct iio_dev *iio_dev,
}
}

+static int ingenic_adc_of_xlate(struct iio_dev *iio_dev,
+ const struct of_phandle_args *iiospec)
+{
+ int i;
+
+ if (!iiospec->args_count)
+ return -EINVAL;
+
+ for (i = 0; i < iio_dev->num_channels; ++i)
+ if (iio_dev->channels[i].channel == iiospec->args[0])
+ return i;
+
+ return -EINVAL;
+}
+
static void ingenic_adc_clk_cleanup(void *data)
{
clk_unprepare(data);
@@ -409,6 +424,7 @@ static const struct iio_info ingenic_adc_info = {
.write_raw = ingenic_adc_write_raw,
.read_raw = ingenic_adc_read_raw,
.read_avail = ingenic_adc_read_avail,
+ .of_xlate = ingenic_adc_of_xlate,
};

static const struct iio_chan_spec ingenic_channels[] = {
--
2.26.2
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