[PATCH 09/11] ASoC: cs35l56: Add calibration command to store into UEFI

Richard Fitzgerald
2025-10-16T10:42:54Z

Add a new command 'store_uefi' to the calibrate sysfs file.
Writing this command will call cs_amp_set_efi_calibration_data()
to save the new data into an EFI variable. This is intended to
be used after a successful factory calibration to save the data
into EFI.

On systems without EFI it will return an error.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
---
include/sound/cs35l56.h | 1 +
sound/soc/codecs/cs35l56-shared.c | 19 +++++++++++++++++--
2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/include/sound/cs35l56.h b/include/sound/cs35l56.h
index 4ed738615021..b3770285261c 100644
--- a/include/sound/cs35l56.h
+++ b/include/sound/cs35l56.h
@@ -314,6 +314,7 @@ struct cs35l56_base {
bool can_hibernate;
bool cal_data_valid;
s8 cal_index;
+ u8 num_amps;
struct cirrus_amp_cal_data cal_data;
struct gpio_desc *reset_gpio;
struct cs35l56_spi_payload *spi_payload_buf;
diff --git a/sound/soc/codecs/cs35l56-shared.c b/sound/soc/codecs/cs35l56-shared.c
index dc6e49e3421a..27fb2f9b83c5 100644
--- a/sound/soc/codecs/cs35l56-shared.c
+++ b/sound/soc/codecs/cs35l56-shared.c
@@ -1101,8 +1101,8 @@ static int cs35l56_perform_calibration(struct cs35l56_base *cs35l56_base)
ssize_t cs35l56_calibrate_sysfs_store(struct cs35l56_base *cs35l56_base,
const char *buf, size_t count)
{
- static const char * const options[] = { "factory" };
- int ret;
+ static const char * const options[] = { "factory", "store_uefi" };
+ int num_amps, ret;

if (!IS_ENABLED(CONFIG_SND_SOC_CS35L56_CAL_SYSFS_COMMON))
return -ENXIO;
@@ -1113,6 +1113,21 @@ ssize_t cs35l56_calibrate_sysfs_store(struct cs35l56_base *cs35l56_base,
if (ret < 0)
return ret;
break;
+ case 1:
+ if (!cs35l56_base->cal_data_valid)
+ return -ENODATA;
+
+ num_amps = cs35l56_base->num_amps;
+ if (num_amps == 0)
+ num_amps = -1;
+
+ ret = cs_amp_set_efi_calibration_data(cs35l56_base->dev,
+ cs35l56_base->cal_index,
+ num_amps,
+ &cs35l56_base->cal_data);
+ if (ret < 0)
+ return ret;
+ break;
default:
return -ENXIO;
}
--
2.47.3