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Diffstat (limited to 'sound/soc/codecs/cs35l41.c')
-rw-r--r--sound/soc/codecs/cs35l41.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/sound/soc/codecs/cs35l41.c b/sound/soc/codecs/cs35l41.c
index 8766e19d85f1..c223d83e02cf 100644
--- a/sound/soc/codecs/cs35l41.c
+++ b/sound/soc/codecs/cs35l41.c
@@ -6,6 +6,7 @@
//
// Author: David Rhodes <david.rhodes@cirrus.com>
+#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
@@ -1142,6 +1143,30 @@ err_dsp:
return ret;
}
+static int cs35l41_acpi_get_name(struct cs35l41_private *cs35l41)
+{
+ acpi_handle handle = ACPI_HANDLE(cs35l41->dev);
+ const char *sub;
+
+ /* If there is no ACPI_HANDLE, there is no ACPI for this system, return 0 */
+ if (!handle)
+ return 0;
+
+ sub = acpi_get_subsystem_id(handle);
+ if (IS_ERR(sub)) {
+ /* If bad ACPI, return 0 and fallback to legacy firmware path, otherwise fail */
+ if (PTR_ERR(sub) == -ENODATA)
+ return 0;
+ else
+ return PTR_ERR(sub);
+ }
+
+ cs35l41->dsp.system_name = sub;
+ dev_dbg(cs35l41->dev, "Subsystem ID: %s\n", cs35l41->dsp.system_name);
+
+ return 0;
+}
+
int cs35l41_probe(struct cs35l41_private *cs35l41, const struct cs35l41_hw_cfg *hw_cfg)
{
u32 regid, reg_revid, i, mtl_revid, int_status, chipid_match;
@@ -1270,6 +1295,10 @@ int cs35l41_probe(struct cs35l41_private *cs35l41, const struct cs35l41_hw_cfg *
goto err;
}
+ ret = cs35l41_acpi_get_name(cs35l41);
+ if (ret < 0)
+ goto err;
+
ret = cs35l41_dsp_init(cs35l41);
if (ret < 0)
goto err;
@@ -1316,6 +1345,7 @@ void cs35l41_remove(struct cs35l41_private *cs35l41)
pm_runtime_disable(cs35l41->dev);
regmap_write(cs35l41->regmap, CS35L41_IRQ1_MASK1, 0xFFFFFFFF);
+ kfree(cs35l41->dsp.system_name);
wm_adsp2_remove(&cs35l41->dsp);
cs35l41_safe_reset(cs35l41->regmap, cs35l41->hw_cfg.bst_type);