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Date: Sat, 7 Jun 2008 18:49:50 +0200 From: Stefan Bauer <stefan.bauer@...tu-chemnitz.de> To: linux-kernel@...r.kernel.org Cc: "Nakajima, Jun" <jun.nakajima@...el.com>, Linus Torvalds <torvalds@...ux-foundation.org> Subject: [RFC] quirk_ich4_lpc_acpi() clarification Hi, I was wondering why my quite ancient i815-based machine with ICH (not ICH4) southbridge told me on startup: pci 0000:00:1f.0: quirk: region 4000-407f claimed by ICH4 ACPI/GPIO/TCO pci 0000:00:1f.0: quirk: region 4080-40bf claimed by ICH4 GPIO Some search brought up that this quirk was originally registered for ICH4 and ICH5 [1], but later extended to apply for ICH to ICH3, too [2]. The comment added by Linus in [2], telling "Intel LPC interface bridges all have 128 bytes of magic ACPI/TCO regs and 64 bytes of GPIO", unfortunately got lost with [3]. So in current state we have some uncertainty: Does "all" mean "all until now" or "all ever using LPC"? In the last case not only comments, but also DECLARE_PCI_FIXUP_HEADERs for the past-ICH5 chipsets would be missing. I would like to fix this by... - mentioning all affected ICHs in the comment - probably give a better 'name' parameter then "ICH4 ..." to quirk_io_region() - probably rename quirk_ich4_lpc_acpi() - add DECLARE_PCI_FIXUP_HEADERs for eventually missing devices But I need some information, especially if past-ICH5 southbridges have got this quirk, too. Regards, Stefan Bauer [1] Add a quirk for the Intel ICH-[45] to add special ACPI regions. http://git.kernel.org/?p=linux/kernel/git/torvalds/old-2.6-bkcvs.git;a=blobdiff;f=drivers/pci/quirks.c;h=0fe0f7656939ba8b2b55e55d2ac4fbe12dee59fa;hp=29313362a8b663ee85a43bcd7f70220bd64598e4;hb=0b7baee8e18d8d309b3918769fc4b60dc075baa5;hpb=7886b5151d14bde184e490201ad51a3f413df8d9 [2] All the Intel LPC bridges have the same PCI quirks. http://git.kernel.org/?p=linux/kernel/git/torvalds/old-2.6-bkcvs.git;a=blobdiff;f=drivers/pci/quirks.c;h=b82a1c31e1df64a8aedb5c868d4e62979cc5fc19;hp=2a2a2f11f3d1a6732c4d119efc62cf74a174b4f8;hb=ca2a9e5a6a068b446ba0829385f9785695df9182;hpb=3b4871d830f2ace4c6dafe33272e0bb2ec8f83fb [3] Merge http://nfsclient.bkbits.net/linux-2.6 http://git.kernel.org/?p=linux/kernel/git/torvalds/old-2.6-bkcvs.git;a=blobdiff;f=drivers/pci/quirks.c;h=164f738df6a7cb1c58f1033382530780a211e039;hp=6e7c350133becd05268d1cb6fa6073019c63457b;hb=ee66a188d8cd63c8baf60f7be2a24faf9d556bbd;hpb=9a1ad97be320d53eba3cdb6a69fbbea27a862461 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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