ti-sysc driver changes for omaps for v5.6 merge window

Few changes to implement quirk handling for cases where we need to block
 clockdomain autoidle, drop old MMU specific quirks, and simplify the
 return code for sysc_init_resets().
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Merge tag 'omap-for-v5.6/ti-sysc-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/drivers

ti-sysc driver changes for omaps for v5.6 merge window

Few changes to implement quirk handling for cases where we need to block
clockdomain autoidle, drop old MMU specific quirks, and simplify the
return code for sysc_init_resets().

* tag 'omap-for-v5.6/ti-sysc-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  bus: ti-sysc: Use PTR_ERR_OR_ZERO() to simplify code
  bus: ti-sysc: Drop MMU quirks
  bus: ti-sysc: Implement quirk handling for CLKDM_NOAUTO

Link: https://lore.kernel.org/r/pull-1579200367-372444@atomide.com-3
Signed-off-by: Olof Johansson <olof@lixom.net>

drivers/bus/ti-sysc.c

@@ -473,7 +473,7 @@ static void sysc_clkdm_deny_idle(struct sysc *ddata)
 {
 	struct ti_sysc_platform_data *pdata;
 
-	if (ddata->legacy_mode)
+	if (ddata->legacy_mode || (ddata->cfg.quirks & SYSC_QUIRK_CLKDM_NOAUTO))
 		return;
 
 	pdata = dev_get_platdata(ddata->dev);
@@ -485,7 +485,7 @@ static void sysc_clkdm_allow_idle(struct sysc *ddata)
 {
 	struct ti_sysc_platform_data *pdata;
 
-	if (ddata->legacy_mode)
+	if (ddata->legacy_mode || (ddata->cfg.quirks & SYSC_QUIRK_CLKDM_NOAUTO))
 		return;
 
 	pdata = dev_get_platdata(ddata->dev);
@@ -503,10 +503,8 @@ static int sysc_init_resets(struct sysc *ddata)
 {
 	ddata->rsts =
 		devm_reset_control_get_optional_shared(ddata->dev, "rstctrl");
-	if (IS_ERR(ddata->rsts))
-		return PTR_ERR(ddata->rsts);
 
-	return 0;
+	return PTR_ERR_OR_ZERO(ddata->rsts);
 }
 
 /**
@@ -1210,10 +1208,6 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
 	/* These drivers need to be fixed to not use pm_runtime_irq_safe() */
 	SYSC_QUIRK("gpio", 0, 0, 0x10, 0x114, 0x50600801, 0xffff00ff,
 		   SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_OPT_CLKS_IN_RESET),
-	SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000020, 0xffffffff,
-		   SYSC_QUIRK_LEGACY_IDLE),
-	SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000030, 0xffffffff,
-		   SYSC_QUIRK_LEGACY_IDLE),
 	SYSC_QUIRK("sham", 0, 0x100, 0x110, 0x114, 0x40000c03, 0xffffffff,
 		   SYSC_QUIRK_LEGACY_IDLE),
 	SYSC_QUIRK("smartreflex", 0, -1, 0x24, -1, 0x00000000, 0xffffffff,
@@ -1245,6 +1239,12 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
 	/* Quirks that need to be set based on detected module */
 	SYSC_QUIRK("aess", 0, 0, 0x10, -1, 0x40000000, 0xffffffff,
 		   SYSC_MODULE_QUIRK_AESS),
+	SYSC_QUIRK("dcan", 0x48480000, 0x20, -1, -1, 0xa3170504, 0xffffffff,
+		   SYSC_QUIRK_CLKDM_NOAUTO),
+	SYSC_QUIRK("dwc3", 0x48880000, 0, 0x10, -1, 0x500a0200, 0xffffffff,
+		   SYSC_QUIRK_CLKDM_NOAUTO),
+	SYSC_QUIRK("dwc3", 0x488c0000, 0, 0x10, -1, 0x500a0200, 0xffffffff,
+		   SYSC_QUIRK_CLKDM_NOAUTO),
 	SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x00000006, 0xffffffff,
 		   SYSC_MODULE_QUIRK_HDQ1W),
 	SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x0000000a, 0xffffffff,

include/linux/platform_data/ti-sysc.h

@@ -49,6 +49,7 @@ struct sysc_regbits {
 	s8 emufree_shift;
 };
 
+#define SYSC_QUIRK_CLKDM_NOAUTO		BIT(21)
 #define SYSC_QUIRK_FORCE_MSTANDBY	BIT(20)
 #define SYSC_MODULE_QUIRK_AESS		BIT(19)
 #define SYSC_MODULE_QUIRK_SGX		BIT(18)