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895d3b53fd
Add the lighest possible sleep mode on Cortex-A9 cores: CPU sleep. It is entered by a simple dsb and wfi instruction via cpu_do_idle(). As just clocks are stopped there is no need to save or restore any state of the system. Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com> Acked-by: Magnus Damm <damm@opensource.se> [ horms@verge.net.au: Added missing includes ] Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
/*
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* r8a7740 power management support
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*
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* Copyright (C) 2012 Renesas Solutions Corp.
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* Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/console.h>
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#include <linux/suspend.h>
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#include <mach/pm-rmobile.h>
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#include <mach/common.h>
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#ifdef CONFIG_PM
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static int r8a7740_pd_a4s_suspend(void)
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{
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/*
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* The A4S domain contains the CPU core and therefore it should
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* only be turned off if the CPU is in use.
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*/
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return -EBUSY;
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}
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static int r8a7740_pd_a3sp_suspend(void)
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{
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/*
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* Serial consoles make use of SCIF hardware located in A3SP,
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* keep such power domain on if "no_console_suspend" is set.
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*/
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return console_suspend_enabled ? 0 : -EBUSY;
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}
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static struct rmobile_pm_domain r8a7740_pm_domains[] = {
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{
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.genpd.name = "A4S",
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.bit_shift = 10,
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.gov = &pm_domain_always_on_gov,
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.no_debug = true,
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.suspend = r8a7740_pd_a4s_suspend,
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},
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{
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.genpd.name = "A3SP",
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.bit_shift = 11,
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.gov = &pm_domain_always_on_gov,
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.no_debug = true,
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.suspend = r8a7740_pd_a3sp_suspend,
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},
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{
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.genpd.name = "A4LC",
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.bit_shift = 1,
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},
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};
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void __init r8a7740_init_pm_domains(void)
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{
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rmobile_init_domains(r8a7740_pm_domains, ARRAY_SIZE(r8a7740_pm_domains));
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pm_genpd_add_subdomain_names("A4S", "A3SP");
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}
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#endif /* CONFIG_PM */
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#ifdef CONFIG_SUSPEND
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static int r8a7740_enter_suspend(suspend_state_t suspend_state)
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{
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cpu_do_idle();
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return 0;
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}
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static void r8a7740_suspend_init(void)
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{
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shmobile_suspend_ops.enter = r8a7740_enter_suspend;
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}
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#else
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static void r8a7740_suspend_init(void) {}
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#endif
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void __init r8a7740_pm_init(void)
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{
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r8a7740_suspend_init();
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}
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