Commit ce9dcb87 authored by Kevin Hilman's avatar Kevin Hilman Committed by Sekhar Nori
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ARM: davinci: add runtime PM support for clock management

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 <>
Cc: Sekhar Nori <>
Signed-off-by: default avatarKevin Hilman <>
[ pruned list of header file includes and removed some
debug code]
Signed-off-by: default avatarSekhar Nori <>
parent 07caba96
......@@ -39,3 +39,4 @@ obj-$(CONFIG_MACH_OMAPL138_HAWKBOARD) += board-omapl138-hawk.o
obj-$(CONFIG_CPU_FREQ) += cpufreq.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
obj-$(CONFIG_SUSPEND) += pm.o sleep.o
obj-$(CONFIG_HAVE_CLK) += pm_domain.o
* Runtime PM support code for DaVinci
* Author: Kevin Hilman
* Copyright (C) 2012 Texas Instruments, Inc.
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
#include <linux/init.h>
#include <linux/pm_runtime.h>
#include <linux/pm_clock.h>
#include <linux/platform_device.h>
static int davinci_pm_runtime_suspend(struct device *dev)
int ret;
dev_dbg(dev, "%s\n", __func__);
ret = pm_generic_runtime_suspend(dev);
if (ret)
return ret;
ret = pm_clk_suspend(dev);
if (ret) {
return ret;
return 0;
static int davinci_pm_runtime_resume(struct device *dev)
dev_dbg(dev, "%s\n", __func__);
return pm_generic_runtime_resume(dev);
static struct dev_pm_domain davinci_pm_domain = {
.ops = {
davinci_pm_runtime_resume, NULL)
static struct pm_clk_notifier_block platform_bus_notifier = {
.pm_domain = &davinci_pm_domain,
static int __init davinci_pm_runtime_init(void)
pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
return 0;
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