[PATCH v2 1/4] iio: magnetometer: add clarifying comment

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From: Martin Kelly <martin@xxxxxxxxxxxxxxxx>

Add a comment clarifying better when to use <device_name> vs
<device_name>-magn in compatibility strings.

Signed-off-by: Martin Kelly <martin@xxxxxxxxxxxxxxxx>
---
 drivers/iio/magnetometer/st_magn_spi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iio/magnetometer/st_magn_spi.c b/drivers/iio/magnetometer/st_magn_spi.c
index 7b7cd08fcc32..15bb09267098 100644
--- a/drivers/iio/magnetometer/st_magn_spi.c
+++ b/drivers/iio/magnetometer/st_magn_spi.c
@@ -23,6 +23,8 @@
  * For new single-chip sensors use <device_name> as compatible string.
  * For old single-chip devices keep <device_name>-magn to maintain
  * compatibility
+ * For multi-chip devices, use <device_name>-magn to distinguish which
+ * capability is being used
  */
 static const struct of_device_id st_magn_of_match[] = {
 	{
-- 
2.11.0




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