[RFC PATCHv2 1/2] Export SoC info through sysfs

On Fri, Mar 11, 2011 at 03:32:51PM +0100, Arnd Bergmann wrote:

On Friday 11 March 2011, Maxime Coquelin wrote:

quoted

Common base to export System-on-Chip related informations through sysfs.

Creation of a "socinfo" directory under /sys/.
Creation of SoC information entries.

Signed-off-by: Maxime COQUELIN <redacted>

I think it's better than the previous patch to create an
artificial device in /sys/devices/system/socinfo, but I'd
still prefer the information to be attached to a real device
that represents the SOC, as I explained in the discussion with
Linus Walleij.

You should definitely add Greg on Cc, as he's maintaining sysfs
and certainly has an opininion here.

	Arnd

quoted

---
 Documentation/ABI/testing/sysfs-socinfo |   16 ++++++
 drivers/base/Kconfig                    |    3 +
 drivers/base/Makefile                   |    1 +
 drivers/base/soc.c                      |   79 +++++++++++++++++++++++++++++++
 include/linux/sys_soc.h                 |   50 +++++++++++++++++++
 5 files changed, 149 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-socinfo
 create mode 100644 drivers/base/soc.c
 create mode 100644 include/linux/sys_soc.h

diff --git a/Documentation/ABI/testing/sysfs-socinfo b/Documentation/ABI/testing/sysfs-socinfo
new file mode 100644
index 0000000..afd9da2
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-socinfo

@@ -0,0 +1,16 @@
+What:		/sys/socinfo
+Date:		March 2011
+contact:	Maxime Coquelin <maxime.coquelin-nonst@stericsson.com>
+Description:
+		The /sys/socinfo directory contains information about the
+		System-on-Chip.	It is only available if platform implements it.
+		This directory contains two kind of attributes :
+			- common attributes: 
+				* machine: the name of the machine.
+				* family: the family name of the SoC
+			- SoC-specific attributes: The SoC vendor can declare attributes
+			  to export some strings to user-space, like the serial-number for
+			  example.
+
+Users:
+		User-space applications which needs these kind of attributes.

I thought I rejected this the last time it came around?

I still fail to understand why this is needed, please provide more
information about why you feel this is something that the kernel needs.

thanks,

greg k-h