From: santosh.shilimkar@ti•com (Santosh Shilimkar)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v2 4/4] ARM: keystone: add PM bus support for clock management
Date: Thu, 10 Oct 2013 20:15:22 -0400 [thread overview]
Message-ID: <5257431A.5090301@ti.com> (raw)
In-Reply-To: <1377819404-9671-5-git-send-email-santosh.shilimkar@ti.com>
On Thursday 29 August 2013 07:36 PM, Santosh Shilimkar wrote:
> Add runtime PM core support to Keystone SOCs by using the pm_clk
> infrastructure of the PM core. Patch is based on Kevin's pm_domain
> work on DaVinci SOCs.
>
> Keystone SOC doesn't have depedency to enable clocks in early
> in the boot and hence the clock and PM bus initialisation is done
> at subsys_init() level.
>
> Cc: Kevin Hilman <khilman@linaro•org>
>
> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti•com>
> ---
For record, updated patch end of the email as discussed here [1]
Regards,
Santosh
[1] http://www.spinics.net/lists/arm-kernel/msg278991.html
>From fc20ffe1213beb09bb7fb6687b404fe48183a55e Mon Sep 17 00:00:00 2001
From: Santosh Shilimkar <santosh.shilimkar@ti•com>
Date: Sun, 14 Jul 2013 17:17:39 -0400
Subject: [PATCH 4/4] ARM: keystone: add PM domain support for clock
management
Add runtime PM core support to Keystone SOCs by using the pm_clk
infrastructure of the PM core. Patch is based on Kevin's pm_domain
work on DaVinci SOCs.
Keystone SOC doesn't have dependency to enable clocks in early
in the boot and hence the clock and PM domain initialisation is done
at subsys_init() level.
Cc: Kevin Hilman <khilman@linaro•org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti•com>
---
arch/arm/mach-keystone/Makefile | 3 ++
arch/arm/mach-keystone/pm_domain.c | 70 ++++++++++++++++++++++++++++++++++++
2 files changed, 73 insertions(+)
create mode 100644 arch/arm/mach-keystone/pm_domain.c
diff --git a/arch/arm/mach-keystone/Makefile b/arch/arm/mach-keystone/Makefile
index ddc52b0..25d9239 100644
--- a/arch/arm/mach-keystone/Makefile
+++ b/arch/arm/mach-keystone/Makefile
@@ -4,3 +4,6 @@ plus_sec := $(call as-instr,.arch_extension sec,+sec)
AFLAGS_smc.o :=-Wa,-march=armv7-a$(plus_sec)
obj-$(CONFIG_SMP) += platsmp.o
+
+# PM domain driver for Keystone SOCs
+obj-$(CONFIG_ARCH_KEYSTONE) += pm_domain.o
diff --git a/arch/arm/mach-keystone/pm_domain.c b/arch/arm/mach-keystone/pm_domain.c
new file mode 100644
index 0000000..beac3fb
--- /dev/null
+++ b/arch/arm/mach-keystone/pm_domain.c
@@ -0,0 +1,70 @@
+/*
+ * PM domain driver for Keystone2 devices
+ *
+ * Copyright 2013 Texas Instruments, Inc.
+ * Santosh Shilimkar <santosh.shillimkar@ti•com>
+ *
+ * Based on Kevins work on DAVINCI SOCs
+ * Kevin Hilman <khilman@linaro•org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/pm_runtime.h>
+#include <linux/pm_clock.h>
+#include <linux/platform_device.h>
+#include <linux/clk-provider.h>
+
+#ifdef CONFIG_PM_RUNTIME
+static int keystone_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) {
+ pm_generic_runtime_resume(dev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int keystone_pm_runtime_resume(struct device *dev)
+{
+ dev_dbg(dev, "%s\n", __func__);
+
+ pm_clk_resume(dev);
+
+ return pm_generic_runtime_resume(dev);
+}
+#endif
+
+static struct dev_pm_domain keystone_pm_domain = {
+ .ops = {
+ SET_RUNTIME_PM_OPS(keystone_pm_runtime_suspend,
+ keystone_pm_runtime_resume, NULL)
+ USE_PLATFORM_PM_SLEEP_OPS
+ },
+};
+
+static struct pm_clk_notifier_block platform_domain_notifier = {
+ .pm_domain = &keystone_pm_domain,
+};
+
+int __init keystone_pm_runtime_init(void)
+{
+ of_clk_init(NULL);
+ pm_clk_add_notifier(&platform_bus_type, &platform_domain_notifier);
+
+ return 0;
+}
+subsys_initcall(keystone_pm_runtime_init);
--
1.7.9.5
next prev parent reply other threads:[~2013-10-11 0:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-29 23:36 [PATCH v2 0/4] ARM: keystone: clock tree and PM bus support Santosh Shilimkar
2013-08-29 23:36 ` [PATCH v2 1/4] ARM: dts: keystone: Add clock tree data to devicetree Santosh Shilimkar
2013-08-29 23:36 ` [PATCH v2 2/4] ARM: dts: keystone: Add clock phandle to UART nodes Santosh Shilimkar
2013-08-29 23:36 ` [PATCH v2 3/4] ARM: keystone: Enable clock drivers Santosh Shilimkar
2013-08-29 23:36 ` [PATCH v2 4/4] ARM: keystone: add PM bus support for clock management Santosh Shilimkar
2013-08-30 16:18 ` Kevin Hilman
2013-08-30 16:25 ` Santosh Shilimkar
2013-10-11 0:15 ` Santosh Shilimkar [this message]
2013-10-14 17:32 ` Kevin Hilman
2013-10-14 18:00 ` Santosh Shilimkar
2013-10-14 18:18 ` Kevin Hilman
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