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1bf25e78af
These are cleanups and smaller changes that either depend on earlier
feature branches or came in late during the development cycle.
We normally try to get all cleanups early, so these are the exceptions:
- A follow-up on the clocksource reworks, hopefully the last time
we need to merge clocksource subsystem changes through arm-soc.
A first set of patches was part of the original 3.10 arm-soc cleanup
series because of interdependencies with timer drivers now moved out
of arch/arm.
- Migrating the SPEAr13xx platform away from using auxdata for DMA
channel descriptions towards using information in device tree,
based on the earlier SPEAr multiplatform series
- A few follow-ups on the Atmel SAMA5 support and other changes
for Atmel at91 based on the larger at91 reworks.
- Moving the armada irqchip implementation to drivers/irqchip
- Several OMAP cleanups following up on the larger series already
merged in 3.10.
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Merge tag 'cleanup-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC late cleanups from Arnd Bergmann:
"These are cleanups and smaller changes that either depend on earlier
feature branches or came in late during the development cycle. We
normally try to get all cleanups early, so these are the exceptions:
- A follow-up on the clocksource reworks, hopefully the last time we
need to merge clocksource subsystem changes through arm-soc.
A first set of patches was part of the original 3.10 arm-soc
cleanup series because of interdependencies with timer drivers now
moved out of arch/arm.
- Migrating the SPEAr13xx platform away from using auxdata for DMA
channel descriptions towards using information in device tree,
based on the earlier SPEAr multiplatform series
- A few follow-ups on the Atmel SAMA5 support and other changes for
Atmel at91 based on the larger at91 reworks.
- Moving the armada irqchip implementation to drivers/irqchip
- Several OMAP cleanups following up on the larger series already
merged in 3.10."
* tag 'cleanup-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (50 commits)
ARM: OMAP4: change the device names in usb_bind_phy
ARM: OMAP2+: Fix mismerge for timer.c between ff931c82 and da4a686a
ARM: SPEAr: conditionalize SMP code
ARM: arch_timer: Silence debug preempt warnings
ARM: OMAP: remove unused variable
serial: amba-pl011: fix !CONFIG_DMA_ENGINE case
ata: arasan: remove the need for platform_data
ARM: at91/sama5d34ek.dts: remove not needed compatibility string
ARM: at91: dts: add MCI DMA support
ARM: at91: dts: add i2c dma support
ARM: at91: dts: set #dma-cells to the correct value
ARM: at91: suspend both memory controllers on at91sam9263
irqchip: armada-370-xp: slightly cleanup irq controller driver
irqchip: armada-370-xp: move IRQ handler to avoid forward declaration
irqchip: move IRQ driver for Armada 370/XP
ARM: mvebu: move L2 cache initialization in init_early()
devtree: add binding documentation for sp804
ARM: integrator-cp: convert use CLKSRC_OF for timer init
ARM: versatile: use OF init for sp804 timer
ARM: versatile: add versatile dtbs to dtbs target
...
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/*
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* based on arch/arm/mach-kirkwood/cpuidle.c
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*
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* CPU idle support for AT91 SoC
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*
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* The cpu idle uses wait-for-interrupt and RAM self refresh in order
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* to implement two idle states -
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* #1 wait-for-interrupt
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* #2 wait-for-interrupt and RAM self refresh
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/cpuidle.h>
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#include <linux/io.h>
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#include <linux/export.h>
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#include <asm/proc-fns.h>
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#include <asm/cpuidle.h>
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#include <mach/cpu.h>
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#include "pm.h"
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#define AT91_MAX_STATES 2
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/* Actual code that puts the SoC in different idle states */
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static int at91_enter_idle(struct cpuidle_device *dev,
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struct cpuidle_driver *drv,
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int index)
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{
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if (cpu_is_at91rm9200())
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at91rm9200_standby();
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else if (cpu_is_at91sam9g45())
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at91sam9g45_standby();
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else if (cpu_is_at91sam9263())
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at91sam9263_standby();
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else
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at91sam9_standby();
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return index;
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}
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static struct cpuidle_driver at91_idle_driver = {
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.name = "at91_idle",
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.owner = THIS_MODULE,
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.states[0] = ARM_CPUIDLE_WFI_STATE,
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.states[1] = {
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.enter = at91_enter_idle,
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.exit_latency = 10,
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.target_residency = 100000,
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.flags = CPUIDLE_FLAG_TIME_VALID,
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.name = "RAM_SR",
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.desc = "WFI and DDR Self Refresh",
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},
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.state_count = AT91_MAX_STATES,
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};
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/* Initialize CPU idle by registering the idle states */
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static int __init at91_init_cpuidle(void)
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{
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return cpuidle_register(&at91_idle_driver, NULL);
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}
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device_initcall(at91_init_cpuidle);
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