bus: ti-sysc: Tag some modules resource providers for noirq suspend

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>

2 files changed, 78 insertions, 0 deletions

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index f27b182384cd..1f90b91dbfae 100644
--- 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
index 80ce28d40832..990aad477458 100644
--- 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)