linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
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 10/16] bus: ti-sysc: Tag some modules resource providers for noirq suspend
Date: Mon, 23 Apr 2018 10:45:43 -0700	[thread overview]
Message-ID: <20180423174549.57412-11-tony@atomide.com> (raw)
In-Reply-To: <20180423174549.57412-1-tony@atomide.com>

Modules that provide resources for other modules need to be suspended
and resumed in the noirq calls. Tag the resource providing modules.

Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 drivers/bus/ti-sysc.c                 | 77 +++++++++++++++++++++++++++
 include/linux/platform_data/ti-sysc.h |  1 +
 2 files changed, 78 insertions(+)

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
@@ -665,6 +665,10 @@ static int sysc_suspend(struct device *dev)
 
 	ddata = dev_get_drvdata(dev);
 
+	if (ddata->cfg.quirks & (SYSC_QUIRK_RESOURCE_PROVIDER |
+				 SYSC_QUIRK_LEGACY_IDLE))
+		return 0;
+
 	if (!ddata->enabled)
 		return 0;
 
@@ -678,6 +682,58 @@ static int sysc_resume(struct device *dev)
 	struct sysc *ddata;
 
 	ddata = dev_get_drvdata(dev);
+
+	if (ddata->cfg.quirks & (SYSC_QUIRK_RESOURCE_PROVIDER |
+				 SYSC_QUIRK_LEGACY_IDLE))
+		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);
+	}
+
+	return 0;
+}
+
+static int sysc_noirq_suspend(struct device *dev)
+{
+	struct sysc *ddata;
+
+	ddata = dev_get_drvdata(dev);
+
+	if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
+		return 0;
+
+	if (!(ddata->cfg.quirks & SYSC_QUIRK_RESOURCE_PROVIDER))
+		return 0;
+
+	if (!ddata->enabled)
+		return 0;
+
+	dev_dbg(ddata->dev, "%s %s\n", __func__,
+		ddata->name ? ddata->name : "");
+
+	ddata->needs_resume = true;
+
+	return sysc_runtime_suspend(dev);
+}
+
+static int sysc_noirq_resume(struct device *dev)
+{
+	struct sysc *ddata;
+
+	ddata = dev_get_drvdata(dev);
+
+	if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
+		return 0;
+
+	if (!(ddata->cfg.quirks & SYSC_QUIRK_RESOURCE_PROVIDER))
+		return 0;
+
 	if (ddata->needs_resume) {
 		ddata->needs_resume = false;
 
@@ -690,6 +746,7 @@ static int sysc_resume(struct device *dev)
 
 static const struct dev_pm_ops sysc_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(sysc_suspend, sysc_resume)
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_noirq_suspend, sysc_noirq_resume)
 	SET_RUNTIME_PM_OPS(sysc_runtime_suspend,
 			   sysc_runtime_resume,
 			   NULL)
@@ -721,6 +778,26 @@ struct sysc_revision_quirk {
 	}
 
 static const struct sysc_revision_quirk sysc_revision_quirks[] = {
+	/* These need to use noirq_suspend */
+	SYSC_QUIRK("control", 0, 0, 0x10, -1, 0x40000900, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("i2c", 0, 0, 0x10, 0x90, 0x5040000a, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("mcspi", 0, 0, 0x10, -1, 0x40300a0b, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x40000100, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("ocp2scp", 0, 0, 0x10, 0x14, 0x50060005, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("padconf", 0, 0, 0x10, -1, 0x4fff0800, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("scm", 0, 0, 0x10, -1, 0x40000900, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("scrm", 0, 0, -1, -1, 0x00000010, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("sdma", 0, 0, 0x2c, 0x28, 0x00010900, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+
 	/* These drivers need to be fixed to not use pm_runtime_irq_safe() */
 	SYSC_QUIRK("gpio", 0, 0, 0x10, 0x114, 0x50600801, 0xffffffff,
 		   SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_OPT_CLKS_IN_RESET),
diff --git a/include/linux/platform_data/ti-sysc.h b/include/linux/platform_data/ti-sysc.h
--- a/include/linux/platform_data/ti-sysc.h
+++ b/include/linux/platform_data/ti-sysc.h
@@ -45,6 +45,7 @@ struct sysc_regbits {
 	s8 emufree_shift;
 };
 
+#define SYSC_QUIRK_RESOURCE_PROVIDER	BIT(9)
 #define SYSC_QUIRK_LEGACY_IDLE		BIT(8)
 #define SYSC_QUIRK_RESET_STATUS		BIT(7)
 #define SYSC_QUIRK_NO_IDLE_ON_INIT	BIT(6)
-- 
2.17.0

  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 ` Tony Lindgren [this message]
2018-04-23 17:45 ` [PATCH 11/16] bus: ti-sysc: Improve suspend and resume handling Tony Lindgren
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180423174549.57412-11-tony@atomide.com \
    --to=tony@atomide.com \
    --cc=d-gerlach@ti.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-omap@vger.kernel.org \
    --cc=nm@ti.com \
    --cc=s-anna@ti.com \
    --cc=t-kristo@ti.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).