From bd9cc12f4a7e7389432bba0cae6970dfc28f423c Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Wed, 3 Oct 2012 12:45:37 +0100 Subject: [PATCH] regmap: Factor out debugfs register read This will allow the use of the same code for reading register ranges. Signed-off-by: Mark Brown --- drivers/base/regmap/regmap-debugfs.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c index bb1ff175b96..25b6843d6a4 100644 --- a/drivers/base/regmap/regmap-debugfs.c +++ b/drivers/base/regmap/regmap-debugfs.c @@ -56,15 +56,15 @@ static const struct file_operations regmap_name_fops = { .llseek = default_llseek, }; -static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf, - size_t count, loff_t *ppos) +static ssize_t regmap_read_debugfs(struct regmap *map, unsigned int from, + unsigned int to, char __user *user_buf, + size_t count, loff_t *ppos) { int reg_len, val_len, tot_len; size_t buf_pos = 0; loff_t p = 0; ssize_t ret; int i; - struct regmap *map = file->private_data; char *buf; unsigned int val; @@ -80,7 +80,7 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf, val_len = 2 * map->format.val_bytes; tot_len = reg_len + val_len + 3; /* : \n */ - for (i = 0; i <= map->max_register; i += map->reg_stride) { + for (i = from; i <= to; i += map->reg_stride) { if (!regmap_readable(map, i)) continue; @@ -95,7 +95,7 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf, /* Format the register */ snprintf(buf + buf_pos, count - buf_pos, "%.*x: ", - reg_len, i); + reg_len, i - from); buf_pos += reg_len + 2; /* Format the value, write all X if we can't read */ @@ -126,6 +126,15 @@ out: return ret; } +static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct regmap *map = file->private_data; + + return regmap_read_debugfs(map, 0, map->max_register, user_buf, + count, ppos); +} + #undef REGMAP_ALLOW_WRITE_DEBUGFS #ifdef REGMAP_ALLOW_WRITE_DEBUGFS /*