From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e2.ny.us.ibm.com (e2.ny.us.ibm.com [32.97.182.142]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e2.ny.us.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTP id D0982DDE2C for ; Sat, 3 Feb 2007 15:16:34 +1100 (EST) Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by e2.ny.us.ibm.com (8.13.8/8.13.8) with ESMTP id l134GSEB025689 for ; Fri, 2 Feb 2007 23:16:28 -0500 Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215]) by d01relay02.pok.ibm.com (8.13.8/8.13.8/NCO v8.2) with ESMTP id l134GTuZ303956 for ; Fri, 2 Feb 2007 23:16:29 -0500 Received: from d01av01.pok.ibm.com (loopback [127.0.0.1]) by d01av01.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id l134GSso019902 for ; Fri, 2 Feb 2007 23:16:28 -0500 Message-ID: <45C40C97.807@austin.ibm.com> Date: Fri, 02 Feb 2007 22:16:23 -0600 From: Manish Ahuja MIME-Version: 1.0 To: Paul Mackerras Subject: Re: [PATCH]Enabling Auto poweron after power is restored. References: <45707469.9060604@austin.ibm.com> <4575E76C.7030300@austin.ibm.com> <17785.415.574041.518517@cargo.ozlabs.ibm.com> <458EBE02.3010401@austin.ibm.com> <17827.5922.667200.166153@cargo.ozlabs.ibm.com> In-Reply-To: <17827.5922.667200.166153@cargo.ozlabs.ibm.com> Content-Type: multipart/mixed; boundary="------------050908090406070005020908" Cc: ppc-dev List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This is a multi-part message in MIME format. --------------050908090406070005020908 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Resubmitting this patch with a sysfs interface instead of /proc. During some off line discussion, /sys/power was suggested as a possible candidate area for this functionality to reside. ------------------------------------------------------------------------------------------------------------------------- During power outages, the ups notifies the system for a shutdown. In the current setup, it isn't possible to poweron when power is restored. This patch fixes the issue by calling the right ibm,power-off-ups token during such events. It also adds a sysfs interface so that rc.powerfail can parse the epow events and modify the power-off behavior accordingly to enable the right token to be called. Signed-off-by: Manish Ahuja --------------050908090406070005020908 Content-Type: text/plain; name="Auto-poweron-patch" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="Auto-poweron-patch" Index: 2.6.20-rc6-git1-t2/arch/powerpc/kernel/rtas.c =================================================================== --- 2.6.20-rc6-git1-t2.orig/arch/powerpc/kernel/rtas.c 2007-02-02 05:47:13.000000000 -0800 +++ 2.6.20-rc6-git1-t2/arch/powerpc/kernel/rtas.c 2007-02-02 08:37:09.000000000 -0800 @@ -607,13 +607,31 @@ for (;;); } +/** + * rtas_power_off - tell firmware about how to power off the system. + * + * This function calls either the power-off rtas token in normal cases + * or the ibm,power-off-ups token (if present & requested) in case of + * a power failure. If power-off token is used, power on will only be + * possible with power button press. If ibm,power-off-ups token is used + * it will allow auto poweron after power is restored. + */ void rtas_power_off(void) { + int rc; + int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups"); + if (rtas_flash_term_hook) - rtas_flash_term_hook(SYS_POWER_OFF); - /* allow power on only with power button press */ - printk("RTAS power-off returned %d\n", - rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1)); + rtas_flash_term_hook(SYS_POWER_OFF); + + if (rtas_poweron_auto == 0 || + rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) { + rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1); + printk(KERN_INFO "RTAS power-off returned %d\n", rc); + } else { + rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL); + printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc); + } for (;;); } Index: 2.6.20-rc6-git1-t2/include/asm-powerpc/rtas.h =================================================================== --- 2.6.20-rc6-git1-t2.orig/include/asm-powerpc/rtas.h 2007-02-02 05:47:32.000000000 -0800 +++ 2.6.20-rc6-git1-t2/include/asm-powerpc/rtas.h 2007-02-02 08:39:25.000000000 -0800 @@ -225,6 +225,9 @@ /* RMO buffer reserved for user-space RTAS use */ extern unsigned long rtas_rmo_buf; +/* Poweron buffer used for enabling auto ups restart */ +extern unsigned long rtas_poweron_auto; + #define GLOBAL_INTERRUPT_QUEUE 9005 /** Index: 2.6.20-rc6-git1-t2/arch/powerpc/platforms/pseries/power.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ 2.6.20-rc6-git1-t2/arch/powerpc/platforms/pseries/power.c 2007-02-02 13:18:09.000000000 -0800 @@ -0,0 +1,87 @@ +/* + * Interface for power-management for ppc64 compliant platform + * + * Manish Ahuja + * + * Feb 2007 + * + * Copyright (C) 2007 IBM Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include +#include +#include +#include + +unsigned long rtas_poweron_auto; /* default and normal state is 0 */ + +static ssize_t auto_poweron_show(struct subsystem * subsys, char * buf) +{ + return sprintf(buf, "%lu\n", rtas_poweron_auto); +} + +static ssize_t +auto_poweron_store(struct subsystem * subsys, const char * buf, size_t n) +{ + int ret; + unsigned long ups_restart; + ret = sscanf(buf, "%lu", &ups_restart); + + if ((ret == 1) && ((ups_restart == 1) || (ups_restart == 0))){ + rtas_poweron_auto = ups_restart; + return n; + } + return -EINVAL; +} + +static struct subsys_attribute auto_poweron_attr = { + .attr = { + .name = __stringify(auto_poweron), + .mode = 0644, + }, + .show = auto_poweron_show, + .store = auto_poweron_store, +}; + +#ifndef CONFIG_PM +decl_subsys(power,NULL,NULL); + +static struct attribute * g[] = { + &auto_poweron_attr.attr, + NULL, +}; + +static struct attribute_group attr_group = { + .attrs = g, +}; + +static int __init pm_init(void) +{ + int error = subsystem_register(&power_subsys); + if (!error) + error = sysfs_create_group(&power_subsys.kset.kobj,&attr_group); + return error; +} +core_initcall(pm_init); +#else +extern struct subsystem power_subsys; + +static int __init apo_pm_init(void) +{ + return(subsys_create_file(&power_subsys, &auto_poweron_attr)); +} +__initcall(apo_pm_init); +#endif Index: 2.6.20-rc6-git1-t2/arch/powerpc/platforms/pseries/Makefile =================================================================== --- 2.6.20-rc6-git1-t2.orig/arch/powerpc/platforms/pseries/Makefile 2007-02-02 05:47:13.000000000 -0800 +++ 2.6.20-rc6-git1-t2/arch/powerpc/platforms/pseries/Makefile 2007-02-02 09:32:09.000000000 -0800 @@ -4,7 +4,7 @@ obj-y := pci.o lpar.o hvCall.o nvram.o reconfig.o \ setup.o iommu.o ras.o rtasd.o pci_dlpar.o \ - firmware.o + firmware.o power.o obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_XICS) += xics.o obj-$(CONFIG_SCANLOG) += scanlog.o --------------050908090406070005020908--