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Subject[PATCHv4 1/4] procfs: Introduce socinfo under /proc
Date
From: Eduardo Valentin <eduardo.valentin@nokia.com>

This patch introduce the /proc/socinfo node. Its purpose is to
export System on Chip information and specific bits.

The way it is done is basically same structure which is used to build
/proc/cpuinfo. Thus, it relies on the existence of socinfo_op seq_operation
structure. This structure must be provided by soc core code.

Signed-off-by: Eduardo Valentin <eduardo.valentin@nokia.com>
---
Documentation/filesystems/proc.txt | 1 +
fs/proc/Kconfig | 7 +++++++
fs/proc/Makefile | 1 +
fs/proc/socinfo.c | 33 +++++++++++++++++++++++++++++++++
4 files changed, 42 insertions(+), 0 deletions(-)
create mode 100644 fs/proc/socinfo.c
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index a4f30fa..039bcb7 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -415,6 +415,7 @@ Table 1-5: Kernel info in /proc
bus Directory containing bus specific information
cmdline Kernel command line
cpuinfo Info about the CPU
+ socinfo Info about the System on Chip
devices Available devices (block and character)
dma Used DMS channels
filesystems Supported filesystems
diff --git a/fs/proc/Kconfig b/fs/proc/Kconfig
index 50f8f06..e683d62 100644
--- a/fs/proc/Kconfig
+++ b/fs/proc/Kconfig
@@ -67,3 +67,10 @@ config PROC_PAGE_MONITOR
/proc/pid/smaps, /proc/pid/clear_refs, /proc/pid/pagemap,
/proc/kpagecount, and /proc/kpageflags. Disabling these
interfaces will reduce the size of the kernel by approximately 4kb.
+
+config PROC_SOCINFO
+ default y
+ depends on PROC_FS
+ bool "Enable /proc/socinfo" if EMBEDDED
+ help
+ Say Y here if you need to see information about the your System on Chip.
diff --git a/fs/proc/Makefile b/fs/proc/Makefile
index 11a7b5c..7757d44 100644
--- a/fs/proc/Makefile
+++ b/fs/proc/Makefile
@@ -26,3 +26,4 @@ proc-$(CONFIG_PROC_VMCORE) += vmcore.o
proc-$(CONFIG_PROC_DEVICETREE) += proc_devtree.o
proc-$(CONFIG_PRINTK) += kmsg.o
proc-$(CONFIG_PROC_PAGE_MONITOR) += page.o
+proc-$(CONFIG_PROC_SOCINFO) += socinfo.o
diff --git a/fs/proc/socinfo.c b/fs/proc/socinfo.c
new file mode 100644
index 0000000..05bfc4f
--- /dev/null
+++ b/fs/proc/socinfo.c
@@ -0,0 +1,33 @@
+/*
+ * fs/proc/socinfo.c
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ *
+ * Contact: Eduardo Valentin <eduardo.valentin@nokia.com>
+ *
+ * proc socinfo file
+ */
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+extern const struct seq_operations socinfo_op;
+static int socinfo_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &socinfo_op);
+}
+
+static const struct file_operations proc_socinfo_operations = {
+ .open = socinfo_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int __init proc_socinfo_init(void)
+{
+ proc_create("socinfo", 0, NULL, &proc_socinfo_operations);
+ return 0;
+}
+module_init(proc_socinfo_init);
--
1.7.0.4.361.g8b5fe.dirty


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