[PATCH 3/3] ASoC: cs35l56: Attempt to read from cirrus,speaker-id device property first

[Charles Keepax <ckeepax@opensource.cirrus.com>]

From: Simon Trimmer <simont@opensource.cirrus.com>

When cs35l56 is connected via cs42l43 there isn't an ACPI node for the
cs35l56 so all properties are under the cs42l43 ACPI node. We're adding
a property as a way for the cs42l43 driver to pass this info in via a
software node.

Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 sound/soc/codecs/cs35l56-shared.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/cs35l56-shared.c b/sound/soc/codecs/cs35l56-shared.c
index 8af89a263594..e89027cd40d1 100644
--- a/sound/soc/codecs/cs35l56-shared.c
+++ b/sound/soc/codecs/cs35l56-shared.c
@@ -853,9 +853,16 @@ EXPORT_SYMBOL_NS_GPL(cs35l56_hw_init, SND_SOC_CS35L56_SHARED);
 int cs35l56_get_speaker_id(struct cs35l56_base *cs35l56_base)
 {
 	struct gpio_descs *descs;
-	int speaker_id;
+	u32 speaker_id;
 	int i, ret;
 
+	/* Attempt to read the speaker type from a device property first */
+	ret = device_property_read_u32(cs35l56_base->dev, "cirrus,speaker-id", &speaker_id);
+	if (!ret) {
+		dev_dbg(cs35l56_base->dev, "Speaker ID = %d\n", speaker_id);
+		return speaker_id;
+	}
+
 	/* Read the speaker type qualifier from the motherboard GPIOs */
 	descs = gpiod_get_array_optional(cs35l56_base->dev, "spk-id", GPIOD_IN);
 	if (!descs) {
-- 
2.39.2