From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [203.10.76.45]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mx.ozlabs.org", Issuer "CA Cert Signing Authority" (verified OK)) by bilbo.ozlabs.org (Postfix) with ESMTPS id 44A57B6F34 for ; Fri, 14 Aug 2009 09:06:27 +1000 (EST) Received: from mail.windriver.com (mail.windriver.com [147.11.1.11]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail7.windriver.com", Issuer "Intel External Basic Issuing CA 3A" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 4B3CEDDD01 for ; Fri, 14 Aug 2009 09:06:24 +1000 (EST) Received: from ALA-MAIL03.corp.ad.wrs.com (ala-mail03 [147.11.57.144]) by mail.windriver.com (8.14.3/8.14.3) with ESMTP id n7DN6GVW016827 for ; Thu, 13 Aug 2009 16:06:17 -0700 (PDT) From: Paul Gortmaker To: linuxppc-dev@ozlabs.org Subject: [PATCH] sbc8560: Fix warm reboot with board specific reset function Date: Thu, 13 Aug 2009 19:06:15 -0400 Message-Id: <1250204775-5001-1-git-send-email-paul.gortmaker@windriver.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Liang Li The existing fsl_rstcr_restart function fails to reset the sbc8560 board. This implements a board specific reset function that uses the RCR(Reset Control Register) of the board's EPLD to do a reset. Signed-off-by: Liang Li Signed-off-by: Paul Gortmaker --- arch/powerpc/platforms/85xx/sbc8560.c | 39 ++++++++++++++++++++++++++++++++- 1 files changed, 38 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/platforms/85xx/sbc8560.c b/arch/powerpc/platforms/85xx/sbc8560.c index cc27807..86dcca2 100644 --- a/arch/powerpc/platforms/85xx/sbc8560.c +++ b/arch/powerpc/platforms/85xx/sbc8560.c @@ -267,6 +267,43 @@ arch_initcall(sbc8560_rtc_init); #endif /* M48T59 */ +static __u8 __iomem *brstcr; + +static int __init sbc8560_bdrstcr_init(void) +{ + struct device_node *np; + struct resource res; + + np = of_find_compatible_node(NULL, NULL, "wrs,sbc8560-brstcr"); + if (np == NULL) { + printk(KERN_WARNING "sbc8560: No board specific RSTCR in DTB.\n"); + return -ENODEV; + } + + of_address_to_resource(np, 0, &res); + + printk(KERN_INFO "sbc8560: Found BRSTCR at i/o 0x%x\n", res.start); + + brstcr = ioremap(res.start, res.end - res.start); + if(!brstcr) + printk(KERN_WARNING "sbc8560: ioremap of brstcr failed.\n"); + + of_node_put(np); + + return 0; +} + +arch_initcall(sbc8560_bdrstcr_init); + +void sbc8560_rstcr_restart(char * cmd) +{ + local_irq_disable(); + if(brstcr) + out_8(brstcr,in_8(brstcr) & 0x7f); + + while(1); +} + define_machine(sbc8560) { .name = "SBC8560", .probe = sbc8560_probe, @@ -274,7 +311,7 @@ define_machine(sbc8560) { .init_IRQ = sbc8560_pic_init, .show_cpuinfo = sbc8560_show_cpuinfo, .get_irq = mpic_get_irq, - .restart = fsl_rstcr_restart, + .restart = sbc8560_rstcr_restart, .calibrate_decr = generic_calibrate_decr, .progress = udbg_progress, }; -- 1.6.3.3