forked from Minki/linux
a5cb514f1f
If the default PM domain using PM_CLK is used for PM runtime, the real PM
domain(s) cannot be registered from DT later.
Hence do not enable it when running a multi-platform kernel with genpd
support on an r8a7740. The R-Mobile PM domain driver will take care of
PM runtime management of the module clocks.
The default PM domain is still needed for:
- platforms without genpd support,
- the legacy (non-DT) case, where genpd may take over later, except
for the C5 "always on" PM domain.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
103 lines
2.4 KiB
C
103 lines
2.4 KiB
C
/*
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* Runtime PM support code
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*
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* Copyright (C) 2009-2010 Magnus Damm
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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/init.h>
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#include <linux/kernel.h>
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#include <linux/io.h>
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#include <linux/pm_runtime.h>
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#include <linux/pm_domain.h>
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#include <linux/pm_clock.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/sh_clk.h>
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#include <linux/bitmap.h>
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#include <linux/slab.h>
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#ifdef CONFIG_PM
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static int sh_pm_runtime_suspend(struct device *dev)
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{
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int ret;
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ret = pm_generic_runtime_suspend(dev);
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if (ret) {
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dev_err(dev, "failed to suspend device\n");
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return ret;
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}
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ret = pm_clk_suspend(dev);
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if (ret) {
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dev_err(dev, "failed to suspend clock\n");
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pm_generic_runtime_resume(dev);
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return ret;
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}
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return 0;
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}
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static int sh_pm_runtime_resume(struct device *dev)
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{
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int ret;
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ret = pm_clk_resume(dev);
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if (ret) {
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dev_err(dev, "failed to resume clock\n");
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return ret;
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}
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return pm_generic_runtime_resume(dev);
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}
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static struct dev_pm_domain default_pm_domain = {
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.ops = {
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.runtime_suspend = sh_pm_runtime_suspend,
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.runtime_resume = sh_pm_runtime_resume,
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USE_PLATFORM_PM_SLEEP_OPS
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},
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};
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#define DEFAULT_PM_DOMAIN_PTR (&default_pm_domain)
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#else
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#define DEFAULT_PM_DOMAIN_PTR NULL
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#endif /* CONFIG_PM */
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static struct pm_clk_notifier_block platform_bus_notifier = {
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.pm_domain = DEFAULT_PM_DOMAIN_PTR,
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.con_ids = { NULL, },
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};
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static int __init sh_pm_runtime_init(void)
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{
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if (IS_ENABLED(CONFIG_ARCH_SHMOBILE_MULTI)) {
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if (!of_machine_is_compatible("renesas,emev2") &&
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!of_machine_is_compatible("renesas,r7s72100") &&
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!of_machine_is_compatible("renesas,r8a73a4") &&
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#ifndef CONFIG_PM_GENERIC_DOMAINS_OF
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!of_machine_is_compatible("renesas,r8a7740") &&
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#endif
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!of_machine_is_compatible("renesas,r8a7778") &&
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!of_machine_is_compatible("renesas,r8a7779") &&
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!of_machine_is_compatible("renesas,r8a7790") &&
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!of_machine_is_compatible("renesas,r8a7791") &&
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!of_machine_is_compatible("renesas,r8a7792") &&
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!of_machine_is_compatible("renesas,r8a7793") &&
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!of_machine_is_compatible("renesas,r8a7794") &&
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!of_machine_is_compatible("renesas,sh7372") &&
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!of_machine_is_compatible("renesas,sh73a0"))
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return 0;
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}
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pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
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return 0;
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}
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core_initcall(sh_pm_runtime_init);
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