From: Masahiro Yamada Date: Thu, 25 Aug 2016 08:02:31 +0000 (+0900) Subject: ARM: uniphier: display revision of Micro Support Card 3.6.x kindly X-Git-Tag: v2016.09~60^2~4 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=499c8679be13383c44a1f277d5b0d7c63b6b2008;p=platform%2Fkernel%2Fu-boot.git ARM: uniphier: display revision of Micro Support Card 3.6.x kindly The revision of the original support card (rev 3.5, rev 3.6) fits in the 8 bit width revision register. When it was extended in a weird way, it was versioned in the format of "3.6.x" (where it should have been "3.7", of course). What is worse, only the sub-level version "6.x" was recorded in the 8 bit width register, completely ignoring the compatibility of the revision register format. This patch saves madly-versioned support cards by assuming the major version "3" when the MSB 4 bit of the register is read as "6". With this, the support card revision that were displayed as "6.10" is now corrected to "3.6.10". Signed-off-by: Masahiro Yamada --- diff --git a/arch/arm/mach-uniphier/micro-support-card.c b/arch/arm/mach-uniphier/micro-support-card.c index eeb515a..6987d1e 100644 --- a/arch/arm/mach-uniphier/micro-support-card.c +++ b/arch/arm/mach-uniphier/micro-support-card.c @@ -1,5 +1,7 @@ /* - * Copyright (C) 2012-2015 Masahiro Yamada + * Copyright (C) 2012-2015 Panasonic Corporation + * Copyright (C) 2015-2016 Socionext Inc. + * Author: Masahiro Yamada * * SPDX-License-Identifier: GPL-2.0+ */ @@ -38,7 +40,12 @@ static int support_card_show_revision(void) u32 revision; revision = readl(MICRO_SUPPORT_CARD_REVISION); - printf("(CPLD version %d.%d)\n", revision >> 4, revision & 0xf); + revision &= 0xff; + + /* revision 3.6.x card changed the revision format */ + printf("(CPLD version %s%d.%d)\n", revision >> 4 == 6 ? "3." : "", + revision >> 4, revision & 0xf); + return 0; }