When loading firmware, wm_adsp uses a number of parameters to determine the path of the firmware and tuning files to load. One of these parameters is system_name. Add support in cs35l41 to read this system name from the ACPI _SUB ID in order to uniquely identify the firmware and tuning mapped to a particular system.
Signed-off-by: Stefan Binding sbinding@opensource.cirrus.com --- sound/soc/codecs/cs35l41.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+)
diff --git a/sound/soc/codecs/cs35l41.c b/sound/soc/codecs/cs35l41.c index 8766e19d85f1..5df04a2ab5a3 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 +1143,28 @@ static int cs35l41_dsp_init(struct cs35l41_private *cs35l41) return ret; }
+static int cs35l41_probe_acpi(struct cs35l41_private *cs35l41) +{ + struct acpi_device *adev; + int ret; + char sub[ACPI_MAX_SUB_BUF_SIZE]; + + adev = ACPI_COMPANION(cs35l41->dev); + /* If there is no ACPI_COMPANION, there is no ACPI for this system, return 0 */ + if (!adev) + return 0; + + ret = acpi_get_sub(adev->handle, sub, sizeof(sub)); + if (ret < 0) + return ret; + + cs35l41->dsp.system_name = devm_kstrdup(cs35l41->dev, sub, GFP_KERNEL); + if (!cs35l41->dsp.system_name) + return -ENOMEM; + + 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 +1293,10 @@ int cs35l41_probe(struct cs35l41_private *cs35l41, const struct cs35l41_hw_cfg * goto err; }
+ ret = cs35l41_probe_acpi(cs35l41); + if (ret < 0) + goto err; + ret = cs35l41_dsp_init(cs35l41); if (ret < 0) goto err;