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ASoC: Intel: atom: Add sysfs entry in order to store FW version

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This patch is adding a sysfs entry in order to be able to get
access to SST FW version.

Signed-off-by: Sebastien Guiriec <sebastien.guiriec@intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sebastien Guiriec 2016-12-05 17:45:02 +01:00 committed by Mark Brown
parent 5203a3ca09
commit fade74dfab
1 changed files with 39 additions and 0 deletions
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39
sound/soc/intel/atom/sst/sst.c
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@ -27,6 +27,7 @@
#include <linux/pm_qos.h>
#include <linux/async.h>
#include <linux/acpi.h>
#include <linux/sysfs.h>
#include <sound/core.h>
#include <sound/soc.h>
#include <asm/platform_sst_audio.h>
@ -242,6 +243,32 @@ int sst_alloc_drv_context(struct intel_sst_drv **ctx,
}
EXPORT_SYMBOL_GPL(sst_alloc_drv_context);
static ssize_t firmware_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct intel_sst_drv *ctx = dev_get_drvdata(dev);
if (ctx->fw_version.type == 0 && ctx->fw_version.major == 0 &&
ctx->fw_version.minor == 0 && ctx->fw_version.build == 0)
return sprintf(buf, "FW not yet loaded\n");
else
return sprintf(buf, "v%02x.%02x.%02x.%02x\n",
ctx->fw_version.type, ctx->fw_version.major,
ctx->fw_version.minor, ctx->fw_version.build);
}
DEVICE_ATTR_RO(firmware_version);
static const struct attribute *sst_fw_version_attrs[] = {
&dev_attr_firmware_version.attr,
NULL,
};
static const struct attribute_group sst_fw_version_attr_group = {
.attrs = (struct attribute **)sst_fw_version_attrs,
};
int sst_context_init(struct intel_sst_drv *ctx)
{
int ret = 0, i;
@ -315,8 +342,19 @@ int sst_context_init(struct intel_sst_drv *ctx)
dev_err(ctx->dev, "Firmware download failed:%d\n", ret);
goto do_free_mem;
}
ret = sysfs_create_group(&ctx->dev->kobj,
&sst_fw_version_attr_group);
if (ret) {
dev_err(ctx->dev,
"Unable to create sysfs\n");
goto err_sysfs;
}
sst_register(ctx->dev);
return 0;
err_sysfs:
sysfs_remove_group(&ctx->dev->kobj, &sst_fw_version_attr_group);
do_free_mem:
destroy_workqueue(ctx->post_msg_wq);
@ -330,6 +368,7 @@ void sst_context_cleanup(struct intel_sst_drv *ctx)
pm_runtime_disable(ctx->dev);
sst_unregister(ctx->dev);
sst_set_fw_state_locked(ctx, SST_SHUTDOWN);
sysfs_remove_group(&ctx->dev->kobj, &sst_fw_version_attr_group);
flush_scheduled_work();
destroy_workqueue(ctx->post_msg_wq);
pm_qos_remove_request(ctx->qos);