Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752426AbbEKFOB (ORCPT ); Mon, 11 May 2015 01:14:01 -0400 Received: from mail-pd0-f175.google.com ([209.85.192.175]:36506 "EHLO mail-pd0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752355AbbEKFN7 (ORCPT ); Mon, 11 May 2015 01:13:59 -0400 From: Sanchayan Maity To: linux-arm-kernel@lists.infradead.org, shawn.guo@linaro.org, kernel@pengutronix.de Cc: stefan@agner.ch, linux-kernel@vger.kernel.org, Sanchayan Maity Subject: [RFC 0/2] Implement SoC bus support for Vybrid Date: Mon, 11 May 2015 10:41:37 +0530 Message-Id: X-Mailer: git-send-email 2.4.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3506 Lines: 121 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/