From: Tony Lindgren <tony@atomide.com>
To: linux-omap@vger.kernel.org
Cc: Dave Gerlach <d-gerlach@ti.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Nishanth Menon <nm@ti.com>, Suman Anna <s-anna@ti.com>,
Tero Kristo <t-kristo@ti.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH 11/16] bus: ti-sysc: Improve suspend and resume handling
Date: Mon, 23 Apr 2018 10:45:44 -0700 [thread overview]
Message-ID: <20180423174549.57412-12-tony@atomide.com> (raw)
In-Reply-To: <20180423174549.57412-1-tony@atomide.com>
Based on testing with more devices I noticed that some devices
don't suspend or resume properly. We need to PM runtime suspend
and resume devices if we have ddata->needs_resume set.
Let's also improve the error handling and add few debug statements
to make it easier to notice suspend and resume related issues if
DEBUG is set.
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
drivers/bus/ti-sysc.c | 54 ++++++++++++++++++++++++++++++++++++++-----
1 file changed, 48 insertions(+), 6 deletions(-)
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -662,6 +662,7 @@ static int __maybe_unused sysc_runtime_resume(struct device *dev)
static int sysc_suspend(struct device *dev)
{
struct sysc *ddata;
+ int error;
ddata = dev_get_drvdata(dev);
@@ -672,14 +673,27 @@ static int sysc_suspend(struct device *dev)
if (!ddata->enabled)
return 0;
+ dev_dbg(ddata->dev, "%s %s\n", __func__,
+ ddata->name ? ddata->name : "");
+
+ error = pm_runtime_put_sync_suspend(dev);
+ if (error < 0) {
+ dev_warn(ddata->dev, "%s not idle %i %s\n",
+ __func__, error,
+ ddata->name ? ddata->name : "");
+
+ return 0;
+ }
+
ddata->needs_resume = true;
- return sysc_runtime_suspend(dev);
+ return 0;
}
static int sysc_resume(struct device *dev)
{
struct sysc *ddata;
+ int error;
ddata = dev_get_drvdata(dev);
@@ -691,9 +705,16 @@ static int sysc_resume(struct device *dev)
dev_dbg(ddata->dev, "%s %s\n", __func__,
ddata->name ? ddata->name : "");
- ddata->needs_resume = false;
+ error = pm_runtime_get_sync(dev);
+ if (error < 0) {
+ dev_err(ddata->dev, "%s error %i %s\n",
+ __func__, error,
+ ddata->name ? ddata->name : "");
- return sysc_runtime_resume(dev);
+ return error;
+ }
+
+ ddata->needs_resume = false;
}
return 0;
@@ -735,6 +756,9 @@ static int sysc_noirq_resume(struct device *dev)
return 0;
if (ddata->needs_resume) {
+ dev_dbg(ddata->dev, "%s %s\n", __func__,
+ ddata->name ? ddata->name : "");
+
ddata->needs_resume = false;
return sysc_runtime_resume(dev);
@@ -1069,18 +1093,33 @@ static int sysc_child_suspend_noirq(struct device *dev)
ddata = sysc_child_to_parent(dev);
+ dev_dbg(ddata->dev, "%s %s\n", __func__,
+ ddata->name ? ddata->name : "");
+
error = pm_generic_suspend_noirq(dev);
- if (error)
+ if (error) {
+ dev_err(dev, "%s error at %i: %i\n",
+ __func__, __LINE__, error);
+
return error;
+ }
if (!pm_runtime_status_suspended(dev)) {
error = pm_generic_runtime_suspend(dev);
- if (error)
+ if (error) {
+ dev_err(dev, "%s error at %i: %i\n",
+ __func__, __LINE__, error);
+
return error;
+ }
error = sysc_runtime_suspend(ddata->dev);
- if (error)
+ if (error) {
+ dev_err(dev, "%s error at %i: %i\n",
+ __func__, __LINE__, error);
+
return error;
+ }
ddata->child_needs_resume = true;
}
@@ -1095,6 +1134,9 @@ static int sysc_child_resume_noirq(struct device *dev)
ddata = sysc_child_to_parent(dev);
+ dev_dbg(ddata->dev, "%s %s\n", __func__,
+ ddata->name ? ddata->name : "");
+
if (ddata->child_needs_resume) {
ddata->child_needs_resume = false;
--
2.17.0
next prev parent reply other threads:[~2018-04-23 17:45 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-23 17:45 [PATCH 00/16] ti-sysc driver changes to support more devices Tony Lindgren
2018-04-23 17:45 ` [PATCH 01/16] ARM: OMAP2+: Drop unused pm-noop Tony Lindgren
2018-04-30 18:57 ` Mauro Carvalho Chehab
2018-04-23 17:45 ` [PATCH 02/16] ARM: OMAP2+: Allow using ti-sysc for system timers Tony Lindgren
2018-04-23 17:45 ` [PATCH 03/16] ARM: OMAP2+: Use signed value for sysc register offsets Tony Lindgren
2018-04-23 17:45 ` [PATCH 04/16] ARM: OMAP2+: Only probe SDMA via ti-sysc if configured in dts Tony Lindgren
2018-04-23 17:45 ` [PATCH 05/16] ARM: OMAP2+: Initialize SoC PM later Tony Lindgren
2018-04-23 17:45 ` [PATCH 06/16] ARM: OMAP2+: Make display related init into device_initcall Tony Lindgren
2018-04-23 17:45 ` [PATCH 07/16] bus: ti-sysc: Handle simple-bus for nested children Tony Lindgren
2018-04-23 17:45 ` [PATCH 08/16] bus: ti-sysc: Make child clock alias handling more generic Tony Lindgren
2018-04-23 17:45 ` [PATCH 09/16] bus: ti-sysc: Add handling for clkctrl opt clocks Tony Lindgren
2018-05-01 13:39 ` Rob Herring
2018-04-23 17:45 ` [PATCH 10/16] bus: ti-sysc: Tag some modules resource providers for noirq suspend Tony Lindgren
2018-04-23 17:45 ` Tony Lindgren [this message]
2018-04-23 17:45 ` [PATCH 12/16] bus: ti-sysc: Add initial support for external resets Tony Lindgren
2018-04-23 17:45 ` [PATCH 13/16] bus: ti-sysc: Detect omap4 type timers for quirk Tony Lindgren
2018-04-23 17:45 ` [PATCH 14/16] bus: ti-sysc: Detect UARTs for SYSC_QUIRK_LEGACY_IDLE quirk on omap4 Tony Lindgren
2018-04-23 17:45 ` [PATCH 15/16] bus: ti-sysc: Tag sdio and wdt with legacy mode for suspend Tony Lindgren
2018-04-23 17:45 ` [PATCH 16/16] bus: ti-sysc: Show module information for suspend if DEBUG is enabled Tony Lindgren
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