ASoC: SDCA: Add flag for unused IRQs

Zero is a valid SDCA IRQ interrupt position so add a special value to
indicate that the IRQ is not used.

Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>
Link: https://patch.msgid.link/20250624122844.2761627-6-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/include/sound/sdca_function.h b/include/sound/sdca_function.h
index 4b278513597e554c670bf7e3afb0fdcf260f7373..b4a97ff087294bfd54ae06bfbf2fbc975c99c1ac 100644 (file)
--- a/include/sound/sdca_function.h
+++ b/include/sound/sdca_function.h
@@ -17,6 +17,8 @@ struct device;
 struct sdca_entity;
 struct sdca_function_desc;
 
+#define SDCA_NO_INTERRUPT -1
+
 /*
  * The addressing space for SDCA relies on 7 bits for Entities, so a
  * maximum of 128 Entities per function can be represented.

diff --git a/sound/soc/sdca/sdca_functions.c b/sound/soc/sdca/sdca_functions.c
index 093c681e93879ed1b40d6daa3e919daa4bbbd2e7..c34f3bf6298336ef632f75ce96d75714d70dfe87 100644 (file)
--- a/sound/soc/sdca/sdca_functions.c
+++ b/sound/soc/sdca/sdca_functions.c
@@ -912,6 +912,8 @@ static int find_sdca_entity_control(struct device *dev, struct sdca_entity *enti
                                       &tmp);
        if (!ret)
                control->interrupt_position = tmp;
+       else
+               control->interrupt_position = SDCA_NO_INTERRUPT;
 
        control->label = find_sdca_control_label(dev, entity, control);
        if (!control->label)