| Message ID | 1314841446-11006-8-git-send-email-robherring2@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Wed, Aug 31, 2011 at 08:44:06PM -0500, Rob Herring wrote: > From: Rob Herring <rob.herring@calxeda.com> > > Add the platform suspend ops for highbank. > > Signed-off-by: Rob Herring <rob.herring@calxeda.com> > --- > Changes in v2: > - s/a9_base_addr/scu_base_addr/ > - use sysregs helper functions > - add __init to highbank_pm_init > > arch/arm/mach-highbank/Makefile | 1 + > arch/arm/mach-highbank/pm.c | 55 +++++++++++++++++++++++++++++++++++++++ > 2 files changed, 56 insertions(+), 0 deletions(-) > create mode 100644 arch/arm/mach-highbank/pm.c > > diff --git a/arch/arm/mach-highbank/Makefile b/arch/arm/mach-highbank/Makefile > index df30b0d..daeb3d8 100644 > --- a/arch/arm/mach-highbank/Makefile > +++ b/arch/arm/mach-highbank/Makefile > @@ -3,3 +3,4 @@ obj-$(CONFIG_DEBUG_LL) += lluart.o > obj-$(CONFIG_SMP) += platsmp.o > obj-$(CONFIG_LOCAL_TIMERS) += localtimer.o > obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o > +obj-$(CONFIG_PM_SLEEP) += pm.o > diff --git a/arch/arm/mach-highbank/pm.c b/arch/arm/mach-highbank/pm.c > new file mode 100644 > index 0000000..33b3beb > --- /dev/null > +++ b/arch/arm/mach-highbank/pm.c > @@ -0,0 +1,55 @@ > +/* > + * Copyright 2011 Calxeda, Inc. > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + * > + * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>. > + */ > + > +#include <linux/init.h> > +#include <linux/io.h> > +#include <linux/suspend.h> > + > +#include <asm/proc-fns.h> > +#include <asm/smp_scu.h> > +#include <asm/suspend.h> > + > +#include "core.h" > +#include "sysregs.h" > + > +static int highbank_suspend_finish(unsigned long val) > +{ > + cpu_do_idle(); > + return 0; > +} > + > +static int highbank_pm_enter(suspend_state_t state) > +{ > + hignbank_set_pwr_suspend(); > + highbank_set_cpu_jump(0, cpu_resume); > + > + scu_power_mode(scu_base_addr, SCU_PM_POWEROFF); > + cpu_suspend(0, highbank_suspend_finish); > + Rob, Just out of curiosity, how can you resume back without taking care of GIC, L2 and SCU which will lose power during suspend? Regards, Shawn > + return 0; > +} > + > +static const struct platform_suspend_ops highbank_pm_ops = { > + .enter = highbank_pm_enter, > + .valid = suspend_valid_only_mem, > +}; > + > +static int __init highbank_pm_init(void) > +{ > + suspend_set_ops(&highbank_pm_ops); > + return 0; > +} > +module_init(highbank_pm_init); > -- > 1.7.4.1 > >
Shawn, On 09/01/2011 07:22 AM, Shawn Guo wrote: > On Wed, Aug 31, 2011 at 08:44:06PM -0500, Rob Herring wrote: >> From: Rob Herring <rob.herring@calxeda.com> >> >> Add the platform suspend ops for highbank. >> >> Signed-off-by: Rob Herring <rob.herring@calxeda.com> >> --- >> Changes in v2: >> - s/a9_base_addr/scu_base_addr/ >> - use sysregs helper functions >> - add __init to highbank_pm_init >> >> arch/arm/mach-highbank/Makefile | 1 + >> arch/arm/mach-highbank/pm.c | 55 +++++++++++++++++++++++++++++++++++++++ >> 2 files changed, 56 insertions(+), 0 deletions(-) >> create mode 100644 arch/arm/mach-highbank/pm.c >> >> diff --git a/arch/arm/mach-highbank/Makefile b/arch/arm/mach-highbank/Makefile >> index df30b0d..daeb3d8 100644 >> --- a/arch/arm/mach-highbank/Makefile >> +++ b/arch/arm/mach-highbank/Makefile >> @@ -3,3 +3,4 @@ obj-$(CONFIG_DEBUG_LL) += lluart.o >> obj-$(CONFIG_SMP) += platsmp.o >> obj-$(CONFIG_LOCAL_TIMERS) += localtimer.o >> obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o >> +obj-$(CONFIG_PM_SLEEP) += pm.o >> diff --git a/arch/arm/mach-highbank/pm.c b/arch/arm/mach-highbank/pm.c >> new file mode 100644 >> index 0000000..33b3beb >> --- /dev/null >> +++ b/arch/arm/mach-highbank/pm.c >> @@ -0,0 +1,55 @@ >> +/* >> + * Copyright 2011 Calxeda, Inc. >> + * >> + * This program is free software; you can redistribute it and/or modify it >> + * under the terms and conditions of the GNU General Public License, >> + * version 2, as published by the Free Software Foundation. >> + * >> + * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>. >> + */ >> + >> +#include <linux/init.h> >> +#include <linux/io.h> >> +#include <linux/suspend.h> >> + >> +#include <asm/proc-fns.h> >> +#include <asm/smp_scu.h> >> +#include <asm/suspend.h> >> + >> +#include "core.h" >> +#include "sysregs.h" >> + >> +static int highbank_suspend_finish(unsigned long val) >> +{ >> + cpu_do_idle(); >> + return 0; >> +} >> + >> +static int highbank_pm_enter(suspend_state_t state) >> +{ >> + hignbank_set_pwr_suspend(); >> + highbank_set_cpu_jump(0, cpu_resume); >> + >> + scu_power_mode(scu_base_addr, SCU_PM_POWEROFF); >> + cpu_suspend(0, highbank_suspend_finish); >> + > Rob, > > Just out of curiosity, how can you resume back without taking care of > GIC, L2 and SCU which will lose power during suspend? > They are not powergated yet, so it's really just wfi ATM. The L2 and SCU will be re-initialized by boot code. The GIC will need some save and restore. Rob
diff --git a/arch/arm/mach-highbank/Makefile b/arch/arm/mach-highbank/Makefile index df30b0d..daeb3d8 100644 --- a/arch/arm/mach-highbank/Makefile +++ b/arch/arm/mach-highbank/Makefile @@ -3,3 +3,4 @@ obj-$(CONFIG_DEBUG_LL) += lluart.o obj-$(CONFIG_SMP) += platsmp.o obj-$(CONFIG_LOCAL_TIMERS) += localtimer.o obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o +obj-$(CONFIG_PM_SLEEP) += pm.o diff --git a/arch/arm/mach-highbank/pm.c b/arch/arm/mach-highbank/pm.c new file mode 100644 index 0000000..33b3beb --- /dev/null +++ b/arch/arm/mach-highbank/pm.c @@ -0,0 +1,55 @@ +/* + * Copyright 2011 Calxeda, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/init.h> +#include <linux/io.h> +#include <linux/suspend.h> + +#include <asm/proc-fns.h> +#include <asm/smp_scu.h> +#include <asm/suspend.h> + +#include "core.h" +#include "sysregs.h" + +static int highbank_suspend_finish(unsigned long val) +{ + cpu_do_idle(); + return 0; +} + +static int highbank_pm_enter(suspend_state_t state) +{ + hignbank_set_pwr_suspend(); + highbank_set_cpu_jump(0, cpu_resume); + + scu_power_mode(scu_base_addr, SCU_PM_POWEROFF); + cpu_suspend(0, highbank_suspend_finish); + + return 0; +} + +static const struct platform_suspend_ops highbank_pm_ops = { + .enter = highbank_pm_enter, + .valid = suspend_valid_only_mem, +}; + +static int __init highbank_pm_init(void) +{ + suspend_set_ops(&highbank_pm_ops); + return 0; +} +module_init(highbank_pm_init);