debugfs: add tools to printk 32-bit registers

Some debugfs file I deal with are mostly blocks of registers,
i.e. lines of the form "<name> = 0x<value>". Some files are only
registers, some include registers blocks among other material.  This
patch introduces data structures and functions to deal with both
cases.  I expect more users of this over time.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@st.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 26 insertions, 0 deletions

diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index e7d9b20ddc5b..5e6b01f6db4c 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -16,6 +16,7 @@
 #define _DEBUGFS_H_
 
 #include <linux/fs.h>
+#include <linux/seq_file.h>
 
 #include <linux/types.h>
 
@@ -26,6 +27,17 @@ struct debugfs_blob_wrapper {
         unsigned long size;
 };
 
+struct debugfs_reg32 {
+        char *name;
+        unsigned long offset;
+};
+
+struct debugfs_regset32 {
+        struct debugfs_reg32 *regs;
+        int nregs;
+        void __iomem *base;
+};
+
 extern struct dentry *arch_debugfs_dir;
 
 #if defined(CONFIG_DEBUG_FS)
@@ -74,6 +86,13 @@ struct dentry *debugfs_create_blob(const char *name, mode_t mode,
                                   struct dentry *parent,
                                   struct debugfs_blob_wrapper *blob);
 
+struct dentry *debugfs_create_regset32(const char *name, mode_t mode,
+                                     struct dentry *parent,
+                                     struct debugfs_regset32 *regset);
+
+int debugfs_print_regs32(struct seq_file *s, struct debugfs_reg32 *regs,
+                         int nregs, void __iomem *base, char *prefix);
+
 bool debugfs_initialized(void);
 
 #else
@@ -188,6 +207,13 @@ static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
         return ERR_PTR(-ENODEV);
 }
 
+static inline struct dentry *debugfs_create_regset32(const char *name,
+                                   mode_t mode, struct dentry *parent,
+                                   struct debugfs_regset32 *regset)
+{
+        return ERR_PTR(-ENODEV);
+}
+
 static inline bool debugfs_initialized(void)
 {
         return false;