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Commit fade74df authored by Sebastien Guiriec's avatar Sebastien Guiriec Committed by Mark Brown
Browse files

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



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

Signed-off-by: default avatarSebastien Guiriec <sebastien.guiriec@intel.com>
Acked-by: default avatarVinod Koul <vinod.koul@intel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 5203a3ca

sound/soc/intel/atom/sst/sst.c

+39 −0
Original line number Diff line number Diff line
@@ -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);