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ce9dcb8784
Add runtime PM core support to davinci by using the pm_clk infrastructure of the PM core. When runtime PM is enabled, the davinci runtime PM implementation will use the pm_clk layer to enable/disable clocks on demand. When runtime PM is disabled, the pm_clk core will automatically enable clocks when the driver is bound and disable clocks when the driver is unbound. Cc: Mark A. Greer <mgreer@animalcreek.com> Cc: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Kevin Hilman <khilman@ti.com> [nsekhar@ti.com: pruned list of header file includes and removed some debug code] Signed-off-by: Sekhar Nori <nsekhar@ti.com>
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
/*
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* Runtime PM support code for DaVinci
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*
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* Author: Kevin Hilman
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*
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* Copyright (C) 2012 Texas Instruments, Inc.
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/init.h>
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#include <linux/pm_runtime.h>
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#include <linux/pm_clock.h>
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#include <linux/platform_device.h>
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#ifdef CONFIG_PM_RUNTIME
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static int davinci_pm_runtime_suspend(struct device *dev)
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{
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int ret;
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dev_dbg(dev, "%s\n", __func__);
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ret = pm_generic_runtime_suspend(dev);
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if (ret)
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return ret;
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ret = pm_clk_suspend(dev);
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if (ret) {
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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 davinci_pm_runtime_resume(struct device *dev)
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{
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dev_dbg(dev, "%s\n", __func__);
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pm_clk_resume(dev);
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return pm_generic_runtime_resume(dev);
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}
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#endif
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static struct dev_pm_domain davinci_pm_domain = {
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.ops = {
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SET_RUNTIME_PM_OPS(davinci_pm_runtime_suspend,
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davinci_pm_runtime_resume, NULL)
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USE_PLATFORM_PM_SLEEP_OPS
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},
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};
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static struct pm_clk_notifier_block platform_bus_notifier = {
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.pm_domain = &davinci_pm_domain,
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};
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static int __init davinci_pm_runtime_init(void)
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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(davinci_pm_runtime_init);
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