lkml.org 
[lkml]   [2011]   [Aug]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] regulator: Add debugfs file showing the supply map table
Date
Useful for working out why things aren't getting plugged together properly.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---
drivers/regulator/core.c | 41 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 41 insertions(+), 0 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index d8e6a42..9a33fe2 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2907,6 +2907,43 @@ void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data)
}
EXPORT_SYMBOL_GPL(regulator_get_init_drvdata);

+#ifdef CONFIG_DEBUG_FS
+static ssize_t supply_map_read_file(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ ssize_t len, ret = 0;
+ struct regulator_map *map;
+
+ if (!buf)
+ return -ENOMEM;
+
+ list_for_each_entry(map, &regulator_map_list, list) {
+ len = snprintf(buf + ret, PAGE_SIZE - ret,
+ "%s -> %s.%s\n",
+ rdev_get_name(map->regulator), map->dev_name,
+ map->supply);
+ if (len >= 0)
+ ret += len;
+ if (ret > PAGE_SIZE) {
+ ret = PAGE_SIZE;
+ break;
+ }
+ }
+
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
+
+ kfree(buf);
+
+ return ret;
+}
+
+static const struct file_operations supply_map_fops = {
+ .read = supply_map_read_file,
+ .llseek = default_llseek,
+};
+#endif
+
static int __init regulator_init(void)
{
int ret;
@@ -2919,6 +2956,10 @@ static int __init regulator_init(void)
pr_warn("regulator: Failed to create debugfs directory\n");
debugfs_root = NULL;
}
+
+ if (IS_ERR(debugfs_create_file("supply_map", 0444, debugfs_root,
+ NULL, &supply_map_fops)))
+ pr_warn("regulator: Failed to create supplies debugfs\n");
#endif

regulator_dummy_init();
--
1.7.5.4


\
 
 \ /
  Last update: 2011-08-23 18:41    [W:0.579 / U:0.060 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site