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author | Shawn Guo <shawn.guo@linaro.org> | 2012-09-13 11:48:07 (GMT) |
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committer | Shawn Guo <shawn.guo@linaro.org> | 2012-10-15 02:02:19 (GMT) |
commit | 3995eb82050a81e11217a0b88b2a5eddd53eb4d6 (patch) | |
tree | b1c04b25317c9dade08d911e8077c8745df8a954 /arch/arm/mach-imx/cpuidle.c | |
parent | e0557c0d1a3a9c38af6777d308f98da12c94e137 (diff) | |
download | linux-fsl-qoriq-3995eb82050a81e11217a0b88b2a5eddd53eb4d6.tar.xz |
ARM: imx: merge plat-mxc into mach-imx
It's really unnecessary to have plat-mxc, and let's merge it into
mach-imx. It's pretty much just a bunch of file renaming and
Kconfig/Makefile merge.
To make the change less invasive, we keep using Kconfig symbol
CONFIG_ARCH_MXC for mach-imx sub-architecture.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-imx/cpuidle.c')
-rw-r--r-- | arch/arm/mach-imx/cpuidle.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/cpuidle.c b/arch/arm/mach-imx/cpuidle.c new file mode 100644 index 0000000..d4cb511 --- /dev/null +++ b/arch/arm/mach-imx/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; +} |