diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/cpuidle/cpuidle-calxeda.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/cpuidle/cpuidle-calxeda.c')
-rw-r--r-- | kernel/drivers/cpuidle/cpuidle-calxeda.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/kernel/drivers/cpuidle/cpuidle-calxeda.c b/kernel/drivers/cpuidle/cpuidle-calxeda.c new file mode 100644 index 000000000..9445e6cc0 --- /dev/null +++ b/kernel/drivers/cpuidle/cpuidle-calxeda.c @@ -0,0 +1,79 @@ +/* + * Copyright 2012 Calxeda, Inc. + * + * Based on arch/arm/plat-mxc/cpuidle.c: #v3.7 + * Copyright 2012 Freescale Semiconductor, Inc. + * Copyright 2012 Linaro Ltd. + * + * 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/>. + * + * Maintainer: Rob Herring <rob.herring@calxeda.com> + */ + +#include <linux/cpuidle.h> +#include <linux/cpu_pm.h> +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/platform_device.h> +#include <asm/cpuidle.h> +#include <asm/suspend.h> +#include <asm/psci.h> + +static int calxeda_idle_finish(unsigned long val) +{ + const struct psci_power_state ps = { + .type = PSCI_POWER_STATE_TYPE_POWER_DOWN, + }; + return psci_ops.cpu_suspend(ps, __pa(cpu_resume)); +} + +static int calxeda_pwrdown_idle(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + cpu_pm_enter(); + cpu_suspend(0, calxeda_idle_finish); + cpu_pm_exit(); + + return index; +} + +static struct cpuidle_driver calxeda_idle_driver = { + .name = "calxeda_idle", + .states = { + ARM_CPUIDLE_WFI_STATE, + { + .name = "PG", + .desc = "Power Gate", + .exit_latency = 30, + .power_usage = 50, + .target_residency = 200, + .enter = calxeda_pwrdown_idle, + }, + }, + .state_count = 2, +}; + +static int calxeda_cpuidle_probe(struct platform_device *pdev) +{ + return cpuidle_register(&calxeda_idle_driver, NULL); +} + +static struct platform_driver calxeda_cpuidle_plat_driver = { + .driver = { + .name = "cpuidle-calxeda", + }, + .probe = calxeda_cpuidle_probe, +}; + +module_platform_driver(calxeda_cpuidle_plat_driver); |