Messages in this thread | | | From | Sanchayan Maity <> | Subject | [RFC 0/2] Implement SoC bus support for Vybrid | Date | Mon, 11 May 2015 10:41:37 +0530 |
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Hello,
Currently this patchset is based of on our local branch but would like some comments before I push this to mainline through Shawn's tree.
This patchset implements the following https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-devices-soc
Currently the required information is more or less read across the whole SoC, but I guess we cannot change that since these are the locations with the required information.
There seem to be three options for the revision field: - ROM revision (see https://community.freescale.com/docs/DOC-94802) - ANADIG revision (ANADIG_DIGIPROC, as used for the i.MX SoC's) - OCOTP revision
Some numbers:
Colibri VF61 1.1A (2N02G) - 0x00000013 - 0x00610000 - 0x01000000 - 0x410000c8
Colibri VF61 V1.0B (1N02G) - 0x00000011 - 0x00610000 - 0x01000000 - 0x410000c8
Colibri VF61 V1.0A (which is actually a VF600 SoC, no L2 cache, since that was the only one we could buy back then, 1N02G printed on it) - 0x00000011 - 0x00610000 - 0x01000000 - none...
Colibri VF50 V1.0A (1N02G) - 0x00000011 - 0x00610000 - 0x01000000 - none...
Vybrid Tower Rev J (1N02G) - 0x00000011 - 0x00610000 - 0x01000000 - 0x410000c8
Read from u-boot md.l 0x80 1 md.l 0x40050260 1 md.l 0x400A5090 1
The ROM revision seems to differ most. So we would like to go with the revision from the ROM register 0x80.
Now coming to the primary question. This ROM revision register is not really within any of the peripheral maps and I would like to access it for the versioning information. Currently, I used ioremap like below
ioremap(ROM_REVISION_REGISTER, SZ_1);
which I guess probably is not the right way to do it. What would be the correct or better way to do this?
Also comments or feedback or any of the other parts of the patch are also welcome.
Some Sample outputs are below: On Colibri VF61 V1.1A: root@colibri-vf:/sys/devices/soc0# ls backlight fxosc regulators sound uevent bl_on gpio-keys revision subsystem clk16m machine soc sxosc family power soc_id syscon-reboot root@colibri-vf:/sys/devices/soc0# cat revision 00000013 root@colibri-vf:/sys/devices/soc0# cat soc_id dbc8435c211629d4 root@colibri-vf:/sys/devices/soc0# cat family Freescale Vybrid VF610
On Colibri VF50 V1.1A: root@colibri-vf:/sys/devices/soc0# ls backlight machine subsystem bl_on power sxosc clk16m regulators syscon-reboot family revision toradex,vf50_touchctrl fxosc soc uevent gpio-keys soc_id root@colibri-vf:/sys/devices/soc0# cat revision 00000013 root@colibri-vf:/sys/devices/soc0# cat soc_id df63c12a2e2161d4 root@colibri-vf:/sys/devices/soc0# cat family Freescale Vybrid VF500 root@colibri-vf:/sys/devices/soc0# cat machine Freescale Vybrid
Thanks & Regards, Sanchayan Maity.
Sanchayan Maity (2): ARM: dts: vfxxx: Add OCOTP node ARM: vf610: Add SoC bus support for Vybrid
arch/arm/boot/dts/vfxxx.dtsi | 5 +++ arch/arm/mach-imx/mach-vf610.c | 76 +++++++++++++++++++++++++++++++++++++++++- 2 files changed, 80 insertions(+), 1 deletion(-)
-- 2.4.0
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