[PATCH v2 7/7] ARM: highbank: add suspend support
From: Shawn Guo <hidden>
Date: 2011-09-01 12:22:40
On Wed, Aug 31, 2011 at 08:44:06PM -0500, Rob Herring wrote:
quoted hunk ↗ jump to hunk
From: Rob Herring <redacted> Add the platform suspend ops for highbank. Signed-off-by: Rob Herring <redacted> --- 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.cdiff --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.odiff --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