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Subject[PATCH 8/9] OMAP1 / PM: Use generic clock manipulation routines for runtime PM
Date
From: Rafael J. Wysocki <rjw@sisk.pl>

Convert OMAP1 to using the new generic clock manipulation routines
and a device power domain for runtime PM instead of overriding the
platform bus type's runtime PM callbacks. This allows us to simplify
OMAP1-specific code and to share some code with other platforms
(shmobile in particular).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
---
arch/arm/mach-omap1/pm_bus.c | 63 +++++++++++++------------------------------
1 file changed, 20 insertions(+), 43 deletions(-)
Index: linux-2.6/arch/arm/mach-omap1/pm_bus.c
===================================================================
--- linux-2.6.orig/arch/arm/mach-omap1/pm_bus.c
+++ linux-2.6/arch/arm/mach-omap1/pm_bus.c
@@ -24,23 +24,18 @@
#ifdef CONFIG_PM_RUNTIME
static int omap1_pm_runtime_suspend(struct device *dev)
{
- struct clk *iclk, *fclk;
- int ret = 0;
+ int ret;

dev_dbg(dev, "%s\n", __func__);

ret = pm_generic_runtime_suspend(dev);
+ if (ret)
+ return ret;

- fclk = clk_get(dev, "fck");
- if (!IS_ERR(fclk)) {
- clk_disable(fclk);
- clk_put(fclk);
- }
-
- iclk = clk_get(dev, "ick");
- if (!IS_ERR(iclk)) {
- clk_disable(iclk);
- clk_put(iclk);
+ ret = pm_runtime_clock_suspend(dev);
+ if (ret) {
+ pm_generic_runtime_resume(dev);
+ return ret;
}

return 0;
@@ -48,23 +43,22 @@ static int omap1_pm_runtime_suspend(stru

static int omap1_pm_runtime_resume(struct device *dev)
{
- struct clk *iclk, *fclk;
-
dev_dbg(dev, "%s\n", __func__);

- iclk = clk_get(dev, "ick");
- if (!IS_ERR(iclk)) {
- clk_enable(iclk);
- clk_put(iclk);
- }
+ pm_runtime_clock_resume(dev);
+ return pm_generic_runtime_resume(dev);
+};

- fclk = clk_get(dev, "fck");
- if (!IS_ERR(fclk)) {
- clk_enable(fclk);
- clk_put(fclk);
- }
+static struct dev_power_domain default_power_domain = {
+ .ops = {
+ USE_PLATFORM_PM_SLEEP_OPS,
+ .runtime_suspend = omap1_pm_runtime_suspend,
+ .runtime_resume = omap1_pm_runtime_resume,
+ },
+};

- return pm_generic_runtime_resume(dev);
+static struct pm_domain_notifier_block platform_bus_notifier = {
+ .pwr_domain = &default_power_domain,
};

static int __init omap1_pm_runtime_init(void)
@@ -75,24 +69,7 @@ static int __init omap1_pm_runtime_init(
if (!cpu_class_is_omap1())
return -ENODEV;

- pm = platform_bus_get_pm_ops();
- if (!pm) {
- pr_err("%s: unable to get dev_pm_ops from platform_bus\n",
- __func__);
- return -ENODEV;
- }
-
- omap_pm = kmemdup(pm, sizeof(struct dev_pm_ops), GFP_KERNEL);
- if (!omap_pm) {
- pr_err("%s: unable to alloc memory for new dev_pm_ops\n",
- __func__);
- return -ENOMEM;
- }
-
- omap_pm->runtime_suspend = omap1_pm_runtime_suspend;
- omap_pm->runtime_resume = omap1_pm_runtime_resume;
-
- platform_bus_set_pm_ops(omap_pm);
+ pm_runtim_clock_add_notifier(&platform_bus_type, &platform_bus_notifier);

return 0;
}


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