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dc4470e177
Add support for the A3SM power domain, and hook it up as a subdomain of A4S. This domain contains the System CPU (Cortex-A9) hardware block. Hence move the special CPU handling from A4S to A3SM. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
116 lines
2.6 KiB
C
116 lines
2.6 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 "common.h"
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#include "pm-rmobile.h"
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#if defined(CONFIG_PM) && !defined(CONFIG_ARCH_MULTIPLATFORM)
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static int r8a7740_pd_a3sm_suspend(void)
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{
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/*
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* The A3SM domain contains the CPU core and therefore it should
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* only be turned off if the CPU is not 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 int r8a7740_pd_d4_suspend(void)
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{
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/*
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* The D4 domain contains the Coresight-ETM hardware block and
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* therefore it should only be turned off if the debug module is
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* not in use.
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*/
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return -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 = "A4LC",
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.bit_shift = 1,
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}, {
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.genpd.name = "A4MP",
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.bit_shift = 2,
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}, {
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.genpd.name = "D4",
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.bit_shift = 3,
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.gov = &pm_domain_always_on_gov,
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.suspend = r8a7740_pd_d4_suspend,
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}, {
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.genpd.name = "A4R",
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.bit_shift = 5,
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}, {
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.genpd.name = "A3RV",
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.bit_shift = 6,
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}, {
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.genpd.name = "A4S",
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.bit_shift = 10,
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.no_debug = true,
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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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.genpd.name = "A3SM",
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.bit_shift = 12,
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.gov = &pm_domain_always_on_gov,
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.suspend = r8a7740_pd_a3sm_suspend,
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}, {
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.genpd.name = "A3SG",
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.bit_shift = 13,
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}, {
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.genpd.name = "A4SU",
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.bit_shift = 20,
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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("A4R", "A3RV");
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pm_genpd_add_subdomain_names("A4S", "A3SP");
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pm_genpd_add_subdomain_names("A4S", "A3SM");
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pm_genpd_add_subdomain_names("A4S", "A3SG");
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}
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#endif /* CONFIG_PM && !CONFIG_ARCH_MULTIPLATFORM */
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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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