diff options
Diffstat (limited to 'sound/soc/codecs/cs35l41.c')
| -rw-r--r-- | sound/soc/codecs/cs35l41.c | 30 |
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); |