[PATCH 6/6] ARM: highbank: add suspend support

From: robherring2@gmail.com (Rob Herring)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 6/6] ARM: highbank: add suspend support
Date: Tue, 16 Aug 2011 15:34:58 -0500	[thread overview]
Message-ID: <1313526898-19920-7-git-send-email-robherring2@gmail.com> (raw)
In-Reply-To: <1313526898-19920-1-git-send-email-robherring2@gmail.com>

From: Rob Herring <rob.herring@calxeda.com>

Add the platform suspend ops for highbank.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
---
 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 b8d5d40..2cd4a1b 100644
--- a/arch/arm/mach-highbank/Makefile
+++ b/arch/arm/mach-highbank/Makefile
@@ -2,3 +2,4 @@ obj-y					:= clock.o highbank.o system.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..36c88df
--- /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)
+{
+	writel(HB_PWR_SUSPEND, sregs_base + HB_SREG_A9_PWR_REQ);
+	highbank_set_cpu_jump(0, cpu_resume);
+
+	scu_power_mode(a9_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 highbank_pm_init(void)
+{
+	suspend_set_ops(&highbank_pm_ops);
+	return 0;
+}
+module_init(highbank_pm_init);
-- 
1.7.4.1
