Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
[pandora-kernel.git] / arch / arm / mach-imx / hotplug.c
1 /*
2  * Copyright 2011 Freescale Semiconductor, Inc.
3  * Copyright 2011 Linaro Ltd.
4  *
5  * The code contained herein is licensed under the GNU General Public
6  * License. You may obtain a copy of the GNU General Public License
7  * Version 2 or later at the following locations:
8  *
9  * http://www.opensource.org/licenses/gpl-license.html
10  * http://www.gnu.org/copyleft/gpl.html
11  */
12
13 #include <linux/errno.h>
14 #include <asm/cacheflush.h>
15 #include <mach/common.h>
16
17 int platform_cpu_kill(unsigned int cpu)
18 {
19         return 1;
20 }
21
22 /*
23  * platform-specific code to shutdown a CPU
24  *
25  * Called with IRQs disabled
26  */
27 void platform_cpu_die(unsigned int cpu)
28 {
29         flush_cache_all();
30         imx_enable_cpu(cpu, false);
31         cpu_do_idle();
32
33         /* We should never return from idle */
34         panic("cpu %d unexpectedly exit from shutdown\n", cpu);
35 }
36
37 int platform_cpu_disable(unsigned int cpu)
38 {
39         /*
40          * we don't allow CPU 0 to be shutdown (it is still too special
41          * e.g. clock tick interrupts)
42          */
43         return cpu == 0 ? -EPERM : 0;
44 }