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soc: qti_battery_debug: Move qbg_context to device bin file

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Replace the "qbg_context" debugfs blob with a binary file associated
with the battery_debug device that provides the same functionality as
the existing debugfs blob for getting QBG context.

Usage:
  # cd /sys/devices/platform/soc/soc:qcom,pmic_glink_log/\
    soc:qcom,pmic_glink_log:qcom,battery_debug
  # echo 1 > qbg_context
  # cat qbg_context > file.bin

Change-Id: I59cfea2880362a95d8c87c02b4d823bfdca4e1e2
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
This commit is contained in:
Guru Das Srinagesh 2020-06-05 10:36:45 -07:00 committed by Anjelique Melendez
parent e4ea2b8741
commit d9197e1de2
1 changed files with 60 additions and 29 deletions
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89
drivers/soc/qcom/qti_battery_debug.c
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@ -275,9 +275,6 @@ static int get_qbg_context_write(void *data, u64 val)
return battery_dbg_write(bd, &req_msg, sizeof(req_msg));
}
DEFINE_DEBUGFS_ATTRIBUTE(get_qbg_context_debugfs_ops, NULL,
get_qbg_context_write, "%llu\n");
#ifdef CONFIG_DEBUG_FS
static int battery_dbg_request_read_votable(struct battery_dbg_dev *bd,
u32 id)
@ -629,34 +626,16 @@ static int battery_dbg_create_votables(struct battery_dbg_dev *bd,
return 0;
}
static int battery_dbg_add_debugfs(struct battery_dbg_dev *bd)
static void battery_dbg_add_debugfs(struct battery_dbg_dev *bd)
{
int rc;
struct dentry *bd_dir, *file;
struct dentry *bd_dir;
bd_dir = debugfs_create_dir("battery_debug", NULL);
if (IS_ERR(bd_dir)) {
rc = PTR_ERR(bd_dir);
pr_err("Failed to create battery debugfs directory: %d\n", rc);
return rc;
}
file = debugfs_create_file_unsafe("get_qbg_context", 0200, bd_dir, bd,
&get_qbg_context_debugfs_ops);
if (IS_ERR(file)) {
rc = PTR_ERR(file);
pr_err("Failed to create get_qbg_context debugfs file: %d\n",
rc);
goto error;
}
bd->qbg_blob.data = bd->qbg_dump.buf;
bd->qbg_blob.size = 0;
file = debugfs_create_blob("qbg_context", 0444, bd_dir, &bd->qbg_blob);
if (IS_ERR(file)) {
rc = PTR_ERR(file);
pr_err("Failed to create qbg_context debugfs file: %d\n", rc);
goto error;
return;
}
rc = battery_dbg_create_votables(bd, bd_dir);
@ -667,18 +646,68 @@ static int battery_dbg_add_debugfs(struct battery_dbg_dev *bd)
bd->debugfs_dir = bd_dir;
return 0;
return;
error:
debugfs_remove_recursive(bd_dir);
return rc;
return;
}
#else
static int battery_dbg_add_debugfs(struct battery_dbg_dev *bd)
static void battery_dbg_add_debugfs(struct battery_dbg_dev *bd)
{
return 0;
return;
}
#endif
static ssize_t qbg_blob_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t pos, size_t count)
{
int rc;
struct device *dev = kobj_to_dev(kobj);
struct battery_dbg_dev *bd = dev_get_drvdata(dev);
rc = get_qbg_context_write(bd, 0); /* second arg is ignored */
if (rc < 0)
return rc;
return count;
}
static ssize_t qbg_blob_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t pos, size_t count)
{
struct device *dev = kobj_to_dev(kobj);
struct battery_dbg_dev *bd = dev_get_drvdata(dev);
return memory_read_from_buffer(buf, count, &pos, bd->qbg_blob.data,
bd->qbg_blob.size);
}
static struct bin_attribute qbg_blob = {
.attr = {
.name = "qbg_context",
.mode = 0600,
},
.read = qbg_blob_read,
.write = qbg_blob_write,
};
static int battery_dbg_add_dev_attr(struct battery_dbg_dev *bd)
{
int rc;
bd->qbg_blob.data = bd->qbg_dump.buf;
bd->qbg_blob.size = 0;
rc = device_create_bin_file(bd->dev, &qbg_blob);
if (rc)
dev_err(bd->dev, "Failed to create qbg_context bin file: %d\n",
rc);
return rc;
}
static int battery_dbg_probe(struct platform_device *pdev)
{
struct battery_dbg_dev *bd;
@ -708,10 +737,12 @@ static int battery_dbg_probe(struct platform_device *pdev)
init_completion(&bd->ack);
platform_set_drvdata(pdev, bd);
rc = battery_dbg_add_debugfs(bd);
rc = battery_dbg_add_dev_attr(bd);
if (rc < 0)
goto out;
battery_dbg_add_debugfs(bd);
return 0;
out:
pmic_glink_unregister_client(bd->client);