linux-kernel - [PATCH] regmap: Add a config option for making regmap debugfs writable

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Message-Id: <1444758415-5190-1-git-send-email-anatol.pomozov@gmail.com>
Date:	Tue, 13 Oct 2015 10:46:55 -0700
From:	Anatol Pomozov <anatol.pomozov@...il.com>
To:	linux-kernel@...r.kernel.org, broonie@...nel.org
Cc:	Anatol Pomozov <anatol.pomozov@...il.com>
Subject: [PATCH] regmap: Add a config option for making regmap debugfs writable

Instead of modifiying source code directly one should use config files.
It is the standard way to set compile-time options.

Signed-off-by: Anatol Pomozov <anatol.pomozov@...il.com>
---
 drivers/base/regmap/Kconfig          | 6 ++++++
 drivers/base/regmap/regmap-debugfs.c | 5 ++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
index db9d00c3..579c8b5 100644
--- a/drivers/base/regmap/Kconfig
+++ b/drivers/base/regmap/Kconfig
@@ -9,6 +9,12 @@ config REGMAP
 	select IRQ_DOMAIN if REGMAP_IRQ
 	bool
 
+config REGMAP_ALLOW_WRITE_DEBUGFS
+	bool "Make regmap debugfs writable"
+	default n
+	select REGMAP
+	select DEBUG_FS
+
 config REGMAP_AC97
 	tristate
 
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index 3f0a7e2..3ea2e27 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -259,8 +259,7 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf,
 				   count, ppos);
 }
 
-#undef REGMAP_ALLOW_WRITE_DEBUGFS
-#ifdef REGMAP_ALLOW_WRITE_DEBUGFS
+#ifdef CONFIG_REGMAP_ALLOW_WRITE_DEBUGFS
 /*
  * This can be dangerous especially when we have clients such as
  * PMICs, therefore don't provide any real compile time configuration option
@@ -595,7 +594,7 @@ void regmap_debugfs_init(struct regmap *map, const char *name)
 	if (map->max_register || regmap_readable(map, 0)) {
 		umode_t registers_mode;
 
-#if defined(REGMAP_ALLOW_WRITE_DEBUGFS)
+#ifdef CONFIG_REGMAP_ALLOW_WRITE_DEBUGFS
 		registers_mode = 0600;
 #else
 		registers_mode = 0400;
-- 
2.6.0.rc2.230.g3dd15c0

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