3e0c190dbf
Added missing __iomem annotation in order to fix the following sparse warnings: drivers/cpuidle/cpuidle-calxeda.c:44:24: warning: incorrect type in argument 1 (different address spaces) drivers/cpuidle/cpuidle-calxeda.c:44:24: expected void [noderef] <asn:2>*<noident> drivers/cpuidle/cpuidle-calxeda.c:44:24: got void *extern [addressable] [toplevel] scu_base_addr drivers/cpuidle/cpuidle-calxeda.c:56:24: warning: incorrect type in argument 1 (different address spaces) drivers/cpuidle/cpuidle-calxeda.c:56:24: expected void [noderef] <asn:2>*<noident> drivers/cpuidle/cpuidle-calxeda.c:56:24: got void *extern [addressable] [toplevel] scu_base_addr Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/*
|
|
* 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/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/time.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/suspend.h>
|
|
#include <asm/cpuidle.h>
|
|
#include <asm/proc-fns.h>
|
|
#include <asm/smp_scu.h>
|
|
#include <asm/suspend.h>
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/cp15.h>
|
|
|
|
extern void highbank_set_cpu_jump(int cpu, void *jump_addr);
|
|
extern void __iomem *scu_base_addr;
|
|
|
|
static noinline void calxeda_idle_restore(void)
|
|
{
|
|
set_cr(get_cr() | CR_C);
|
|
set_auxcr(get_auxcr() | 0x40);
|
|
scu_power_mode(scu_base_addr, SCU_PM_NORMAL);
|
|
}
|
|
|
|
static int calxeda_idle_finish(unsigned long val)
|
|
{
|
|
/* Already flushed cache, but do it again as the outer cache functions
|
|
* dirty the cache with spinlocks */
|
|
flush_cache_all();
|
|
|
|
set_auxcr(get_auxcr() & ~0x40);
|
|
set_cr(get_cr() & ~CR_C);
|
|
|
|
scu_power_mode(scu_base_addr, SCU_PM_DORMANT);
|
|
|
|
cpu_do_idle();
|
|
|
|
/* Restore things if we didn't enter power-gating */
|
|
calxeda_idle_restore();
|
|
return 1;
|
|
}
|
|
|
|
static int calxeda_pwrdown_idle(struct cpuidle_device *dev,
|
|
struct cpuidle_driver *drv,
|
|
int index)
|
|
{
|
|
highbank_set_cpu_jump(smp_processor_id(), cpu_resume);
|
|
cpu_suspend(0, calxeda_idle_finish);
|
|
return index;
|
|
}
|
|
|
|
static struct cpuidle_driver calxeda_idle_driver = {
|
|
.name = "calxeda_idle",
|
|
.states = {
|
|
ARM_CPUIDLE_WFI_STATE,
|
|
{
|
|
.name = "PG",
|
|
.desc = "Power Gate",
|
|
.flags = CPUIDLE_FLAG_TIME_VALID,
|
|
.exit_latency = 30,
|
|
.power_usage = 50,
|
|
.target_residency = 200,
|
|
.enter = calxeda_pwrdown_idle,
|
|
},
|
|
},
|
|
.state_count = 2,
|
|
};
|
|
|
|
static int __init calxeda_cpuidle_init(void)
|
|
{
|
|
if (!of_machine_is_compatible("calxeda,highbank"))
|
|
return -ENODEV;
|
|
|
|
return cpuidle_register(&calxeda_idle_driver, NULL);
|
|
}
|
|
module_init(calxeda_cpuidle_init);
|