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author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-09-12 11:14:33 -0400 |
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committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-09-12 11:14:33 -0400 |
commit | 25a765b7f05cb8460fa01b54568894b20e184862 (patch) | |
tree | 0b56db57b4d9f912393ab303c269e0fe6cdf8635 /arch/arm/plat-mxc/cpuidle.c | |
parent | 9d2be9287107695708e6aae5105a8a518a6cb4d0 (diff) | |
parent | 64282278989d5b0398dcb3ba7904cb00c621dc35 (diff) |
Merge branch 'x86/platform' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into stable/for-linus-3.7
* 'x86/platform' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (9690 commits)
x86: Document x86_init.paging.pagetable_init()
x86: xen: Cleanup and remove x86_init.paging.pagetable_setup_done()
x86: Move paging_init() call to x86_init.paging.pagetable_init()
x86: Rename pagetable_setup_start() to pagetable_init()
x86: Remove base argument from x86_init.paging.pagetable_setup_start
Linux 3.6-rc5
HID: tpkbd: work even if the new Lenovo Keyboard driver is not configured
Remove user-triggerable BUG from mpol_to_str
xen/pciback: Fix proper FLR steps.
uml: fix compile error in deliver_alarm()
dj: memory scribble in logi_dj
Fix order of arguments to compat_put_time[spec|val]
xen: Use correct masking in xen_swiotlb_alloc_coherent.
xen: fix logical error in tlb flushing
xen/p2m: Fix one-off error in checking the P2M tree directory.
powerpc: Don't use __put_user() in patch_instruction
powerpc: Make sure IPI handlers see data written by IPI senders
powerpc: Restore correct DSCR in context switch
powerpc: Fix DSCR inheritance in copy_thread()
powerpc: Keep thread.dscr and thread.dscr_inherit in sync
...
Diffstat (limited to 'arch/arm/plat-mxc/cpuidle.c')
-rw-r--r-- | arch/arm/plat-mxc/cpuidle.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/cpuidle.c b/arch/arm/plat-mxc/cpuidle.c new file mode 100644 index 00000000000..d4cb511a44a --- /dev/null +++ b/arch/arm/plat-mxc/cpuidle.c @@ -0,0 +1,80 @@ +/* + * Copyright 2012 Freescale Semiconductor, Inc. + * Copyright 2012 Linaro Ltd. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/cpuidle.h> +#include <linux/err.h> +#include <linux/hrtimer.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/slab.h> + +static struct cpuidle_device __percpu * imx_cpuidle_devices; + +static void __init imx_cpuidle_devices_uninit(void) +{ + int cpu_id; + struct cpuidle_device *dev; + + for_each_possible_cpu(cpu_id) { + dev = per_cpu_ptr(imx_cpuidle_devices, cpu_id); + cpuidle_unregister_device(dev); + } + + free_percpu(imx_cpuidle_devices); +} + +int __init imx_cpuidle_init(struct cpuidle_driver *drv) +{ + struct cpuidle_device *dev; + int cpu_id, ret; + + if (drv->state_count > CPUIDLE_STATE_MAX) { + pr_err("%s: state_count exceeds maximum\n", __func__); + return -EINVAL; + } + + ret = cpuidle_register_driver(drv); + if (ret) { + pr_err("%s: Failed to register cpuidle driver with error: %d\n", + __func__, ret); + return ret; + } + + imx_cpuidle_devices = alloc_percpu(struct cpuidle_device); + if (imx_cpuidle_devices == NULL) { + ret = -ENOMEM; + goto unregister_drv; + } + + /* initialize state data for each cpuidle_device */ + for_each_possible_cpu(cpu_id) { + dev = per_cpu_ptr(imx_cpuidle_devices, cpu_id); + dev->cpu = cpu_id; + dev->state_count = drv->state_count; + + ret = cpuidle_register_device(dev); + if (ret) { + pr_err("%s: Failed to register cpu %u, error: %d\n", + __func__, cpu_id, ret); + goto uninit; + } + } + + return 0; + +uninit: + imx_cpuidle_devices_uninit(); + +unregister_drv: + cpuidle_unregister_driver(drv); + return ret; +} |