[PATCH v5] ASoC: cs35l41: Steam Deck Shared boost properties quirk

[Lucas Tanure]

Add support for Steam Deck bios old properties. If a Steam deck didn't
upgrade the BIOS, the driver should be able to handle the previous
properties for shared boost types.

Signed-off-by: Lucas Tanure <lucas.tanure@xxxxxxxxxxxxx>
Acked-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxx>
---
Changes since V4:
 - Add documentation about this quirk

Changes since V3:
 - Fixed missing space in if statement
 - Fix the build issue, as dependency patches are already merged

Changes since V2:
 - sent the wrong patch with missing fixed lines
Changes since V1:
 - else in same line as {
---
 sound/soc/codecs/cs35l41.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/cs35l41.c b/sound/soc/codecs/cs35l41.c
index 1624510d09c0..9ec01a5f09ca 100644
--- a/sound/soc/codecs/cs35l41.c
+++ b/sound/soc/codecs/cs35l41.c
@@ -1022,9 +1022,21 @@ static int cs35l41_handle_pdata(struct device *dev, struct cs35l41_hw_cfg *hw_cf
 	unsigned int val;
 	int ret;
 
-	ret = device_property_read_u32(dev, "cirrus,boost-type", &val);
-	if (ret >= 0)
-		hw_cfg->bst_type = val;
+	/* Some ACPI systems received the Shared Boost feature before the upstream driver,
+	 * leaving those systems with deprecated _DSD properties.
+	 * To correctly configure those systems add shared-boost-active and shared-boost-passive
+	 * properties mapped to the correct value in boost-type.
+	 * These two are not DT properties and should not be used in new systems designs.
+	 */
+	if (device_property_read_bool(dev, "cirrus,shared-boost-active")) {
+		hw_cfg->bst_type = CS35L41_SHD_BOOST_ACTV;
+	} else if (device_property_read_bool(dev, "cirrus,shared-boost-passive")) {
+		hw_cfg->bst_type = CS35L41_SHD_BOOST_PASS;
+	} else {
+		ret = device_property_read_u32(dev, "cirrus,boost-type", &val);
+		if (ret >= 0)
+			hw_cfg->bst_type = val;
+	}
 
 	ret = device_property_read_u32(dev, "cirrus,boost-peak-milliamp", &val);
 	if (ret >= 0)
-- 
2.39.2