[RFC/RFT 2/6] clk: qcom: Add runtime support to handle clocks using PM clocks

[Rajendra Nayak]

Add runtime PM support to handle (core and iface) clocks for devices
without a controllable power domain. Once the drivers for these devices
are converted to use runtime PM apis, all clock handling (for core and
iface) from these drivers can then be removed.

Signed-off-by: Rajendra Nayak <rnayak at codeaurora.org>
---
 drivers/clk/qcom/gdsc.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c
index 480ebf6..92b0f6d 100644
--- a/drivers/clk/qcom/gdsc.c
+++ b/drivers/clk/qcom/gdsc.c
@@ -15,6 +15,7 @@
 #include <linux/err.h>
 #include <linux/jiffies.h>
 #include <linux/pm_clock.h>
+#include <linux/platform_device.h>
 #include <linux/slab.h>
 #include "gdsc.h"
 
@@ -226,3 +227,22 @@ void gdsc_unregister(struct device *dev)
 {
 	of_genpd_del_provider(dev->of_node);
 }
+
+static struct dev_pm_domain default_qcom_pm_domain = {
+	.ops = {
+		USE_PM_CLK_RUNTIME_OPS
+		USE_PLATFORM_PM_SLEEP_OPS
+	},
+};
+
+static struct pm_clk_notifier_block qcom_pm_notifier = {
+	.pm_domain	= &default_qcom_pm_domain,
+	.con_ids	= { "core", "iface" },
+};
+
+static int __init qcom_pm_runtime_init(void)
+{
+	pm_clk_add_notifier(&platform_bus_type, &qcom_pm_notifier);
+	return 0;
+}
+core_initcall(qcom_pm_runtime_init);
-- 
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