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Diffstat (limited to 'arch/arm/mach-mx35/pm.c')
-rw-r--r-- | arch/arm/mach-mx35/pm.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/arch/arm/mach-mx35/pm.c b/arch/arm/mach-mx35/pm.c new file mode 100644 index 000000000000..ad375ce2fb78 --- /dev/null +++ b/arch/arm/mach-mx35/pm.c @@ -0,0 +1,79 @@ +/* + * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * 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/kernel.h> +#include <linux/suspend.h> + +/*! + * @defgroup MSL_MX35 i.MX35 Machine Specific Layer (MSL) + */ + +/*! + * @file mach-mx35/pm.c + * @brief This file contains suspend operations + * + * @ingroup MSL_MX35 + */ +static int mx35_suspend_enter(suspend_state_t state) +{ + switch (state) { + case PM_SUSPEND_MEM: + mxc_cpu_lp_set(STOP_POWER_OFF); + break; + case PM_SUSPEND_STANDBY: + mxc_cpu_lp_set(STOP_POWER_ON); + break; + default: + return -EINVAL; + } + /* Executing CP15 (Wait-for-Interrupt) Instruction */ + cpu_do_idle(); + return 0; +} + +/* + * Called after processes are frozen, but before we shut down devices. + */ +static int mx35_suspend_prepare(void) +{ + return 0; +} + +/* + * Called after devices are re-setup, but before processes are thawed. + */ +static void mx35_suspend_finish(void) +{ +} + +static int mx35_pm_valid(suspend_state_t state) +{ + return (state > PM_SUSPEND_ON && state <= PM_SUSPEND_MAX); +} + +struct platform_suspend_ops mx35_suspend_ops = { + .valid = mx35_pm_valid, + .prepare = mx35_suspend_prepare, + .enter = mx35_suspend_enter, + .finish = mx35_suspend_finish, +}; + +static int __init mx35_pm_init(void) +{ + pr_info("Static Power Management for Freescale i.MX35\n"); + suspend_set_ops(&mx35_suspend_ops); + + return 0; +} + +late_initcall(mx35_pm_init); |