1 files changed, 120 insertions, 243 deletions

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 9a7d12332fad..610354ce7f8f 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -1,6 +1,17 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
  * ti-sysc.c - Texas Instruments sysc interconnect target driver
+ *
+ * TI SoCs have an interconnect target wrapper IP for many devices. The wrapper
+ * IP manages clock gating, resets, and PM capabilities for the connected devices.
+ *
+ * Copyright (C) 2017-2024 Texas Instruments Incorporated - https://www.ti.com/
+ *
+ * Many features are based on the earlier omap_hwmod arch code with thanks to all
+ * the people who developed and debugged the code over the years:
+ *
+ * Copyright (C) 2009-2011 Nokia Corporation
+ * Copyright (C) 2011-2021 Texas Instruments Incorporated - https://www.ti.com/
  */
 
 #include <linux/io.h>
@@ -37,7 +48,9 @@ enum sysc_soc {
 	SOC_UNKNOWN,
 	SOC_2420,
 	SOC_2430,
+	SOC_AM33,
 	SOC_3430,
+	SOC_AM35,
 	SOC_3630,
 	SOC_4430,
 	SOC_4460,
@@ -109,11 +122,11 @@ static const char * const clock_names[SYSC_MAX_CLOCKS] = {
  * @cookie: data used by legacy platform callbacks
  * @name: name if available
  * @revision: interconnect target module revision
+ * @sysconfig: saved sysconfig register value
  * @reserved: target module is reserved and already in use
  * @enabled: sysc runtime enabled status
  * @needs_resume: runtime resume needed on resume from suspend
  * @child_needs_resume: runtime resume needed for child on resume from suspend
- * @disable_on_idle: status flag used for disabling modules with resets
  * @idle_work: work structure used to perform delayed idle on a module
  * @pre_reset_quirk: module specific pre-reset quirk
  * @post_reset_quirk: module specific post-reset quirk
@@ -648,91 +661,23 @@ static int sysc_init_resets(struct sysc *ddata)
 static int sysc_parse_and_check_child_range(struct sysc *ddata)
 {
 	struct device_node *np = ddata->dev->of_node;
-	const __be32 *ranges;
-	u32 nr_addr, nr_size;
-	int len, error;
-
-	ranges = of_get_property(np, "ranges", &len);
-	if (!ranges) {
-		dev_err(ddata->dev, "missing ranges for %pOF\n", np);
-
-		return -ENOENT;
-	}
-
-	len /= sizeof(*ranges);
-
-	if (len < 3) {
-		dev_err(ddata->dev, "incomplete ranges for %pOF\n", np);
-
-		return -EINVAL;
-	}
-
-	error = of_property_read_u32(np, "#address-cells", &nr_addr);
-	if (error)
-		return -ENOENT;
+	struct of_range_parser parser;
+	struct of_range range;
+	int error;
 
-	error = of_property_read_u32(np, "#size-cells", &nr_size);
+	error = of_range_parser_init(&parser, np);
 	if (error)
-		return -ENOENT;
-
-	if (nr_addr != 1 || nr_size != 1) {
-		dev_err(ddata->dev, "invalid ranges for %pOF\n", np);
+		return error;
 
-		return -EINVAL;
+	for_each_of_range(&parser, &range) {
+		ddata->module_pa = range.cpu_addr;
+		ddata->module_size = range.size;
+		break;
 	}
 
-	ranges++;
-	ddata->module_pa = of_translate_address(np, ranges++);
-	ddata->module_size = be32_to_cpup(ranges);
-
 	return 0;
 }
 
-/* Interconnect instances to probe before l4_per instances */
-static struct resource early_bus_ranges[] = {
-	/* am3/4 l4_wkup */
-	{ .start = 0x44c00000, .end = 0x44c00000 + 0x300000, },
-	/* omap4/5 and dra7 l4_cfg */
-	{ .start = 0x4a000000, .end = 0x4a000000 + 0x300000, },
-	/* omap4 l4_wkup */
-	{ .start = 0x4a300000, .end = 0x4a300000 + 0x30000,  },
-	/* omap5 and dra7 l4_wkup without dra7 dcan segment */
-	{ .start = 0x4ae00000, .end = 0x4ae00000 + 0x30000,  },
-};
-
-static atomic_t sysc_defer = ATOMIC_INIT(10);
-
-/**
- * sysc_defer_non_critical - defer non_critical interconnect probing
- * @ddata: device driver data
- *
- * We want to probe l4_cfg and l4_wkup interconnect instances before any
- * l4_per instances as l4_per instances depend on resources on l4_cfg and
- * l4_wkup interconnects.
- */
-static int sysc_defer_non_critical(struct sysc *ddata)
-{
-	struct resource *res;
-	int i;
-
-	if (!atomic_read(&sysc_defer))
-		return 0;
-
-	for (i = 0; i < ARRAY_SIZE(early_bus_ranges); i++) {
-		res = &early_bus_ranges[i];
-		if (ddata->module_pa >= res->start &&
-		    ddata->module_pa <= res->end) {
-			atomic_set(&sysc_defer, 0);
-
-			return 0;
-		}
-	}
-
-	atomic_dec_if_positive(&sysc_defer);
-
-	return -EPROBE_DEFER;
-}
-
 static struct device_node *stdout_path;
 
 static void sysc_init_stdout_path(struct sysc *ddata)
@@ -913,7 +858,7 @@ static int sysc_check_registers(struct sysc *ddata)
  * within the interconnect target module range. For example, SGX has
  * them at offset 0x1fc00 in the 32MB module address space. And cpsw
  * has them at offset 0x1200 in the CPSW_WR child. Usually the
- * the interconnect target module registers are at the beginning of
+ * interconnect target module registers are at the beginning of
  * the module range though.
  */
 static int sysc_ioremap(struct sysc *ddata)
@@ -958,13 +903,9 @@ static int sysc_map_and_check_registers(struct sysc *ddata)
 	if (error)
 		return error;
 
-	error = sysc_defer_non_critical(ddata);
-	if (error)
-		return error;
-
 	sysc_check_children(ddata);
 
-	if (!of_get_property(np, "reg", NULL))
+	if (!of_property_present(np, "reg"))
 		return 0;
 
 	error = sysc_parse_registers(ddata);
@@ -1119,6 +1060,11 @@ static int sysc_enable_module(struct device *dev)
 	if (ddata->cfg.quirks & (SYSC_QUIRK_SWSUP_SIDLE |
 				 SYSC_QUIRK_SWSUP_SIDLE_ACT)) {
 		best_mode = SYSC_IDLE_NO;
+
+		/* Clear WAKEUP */
+		if (regbits->enwkup_shift >= 0 &&
+		    ddata->cfg.sysc_val & BIT(regbits->enwkup_shift))
+			reg &= ~BIT(regbits->enwkup_shift);
 	} else {
 		best_mode = fls(ddata->cfg.sidlemodes) - 1;
 		if (best_mode > SYSC_IDLE_MASK) {
@@ -1246,6 +1192,13 @@ set_sidle:
 		}
 	}
 
+	if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_SIDLE_ACT) {
+		/* Set WAKEUP */
+		if (regbits->enwkup_shift >= 0 &&
+		    ddata->cfg.sysc_val & BIT(regbits->enwkup_shift))
+			reg |= BIT(regbits->enwkup_shift);
+	}
+
 	reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift);
 	reg |= best_mode << regbits->sidle_shift;
 	if (regbits->autoidle_shift >= 0 &&
@@ -1467,8 +1420,7 @@ static int __maybe_unused sysc_noirq_suspend(struct device *dev)
 
 	ddata = dev_get_drvdata(dev);
 
-	if (ddata->cfg.quirks &
-	    (SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_NO_IDLE))
+	if (ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE)
 		return 0;
 
 	if (!ddata->enabled)
@@ -1486,8 +1438,7 @@ static int __maybe_unused sysc_noirq_resume(struct device *dev)
 
 	ddata = dev_get_drvdata(dev);
 
-	if (ddata->cfg.quirks &
-	    (SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_NO_IDLE))
+	if (ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE)
 		return 0;
 
 	if (ddata->cfg.quirks & SYSC_QUIRK_REINIT_ON_RESUME) {
@@ -1538,17 +1489,6 @@ struct sysc_revision_quirk {
 	}
 
 static const struct sysc_revision_quirk sysc_revision_quirks[] = {
-	/* These drivers need to be fixed to not use pm_runtime_irq_safe() */
-	SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000046, 0xffffffff,
-		   SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
-	SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000052, 0xffffffff,
-		   SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
-	/* Uarts on omap4 and later */
-	SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x50411e03, 0xffff00ff,
-		   SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
-	SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x47422e03, 0xffffffff,
-		   SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
-
 	/* Quirks that need to be set based on the module address */
 	SYSC_QUIRK("mcpdm", 0x40132000, 0, 0x10, -ENODEV, 0x50000800, 0xffffffff,
 		   SYSC_QUIRK_EXT_OPT_CLOCK | SYSC_QUIRK_NO_RESET_ON_INIT |
@@ -1606,10 +1546,27 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
 		   SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
 	SYSC_QUIRK("sata", 0, 0xfc, 0x1100, -ENODEV, 0x5e412000, 0xffffffff,
 		   SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
+	SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000046, 0xffffffff,
+		   SYSC_QUIRK_SWSUP_SIDLE_ACT),
+	SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000052, 0xffffffff,
+		   SYSC_QUIRK_SWSUP_SIDLE_ACT),
+	/* Uarts on omap4 and later */
+	SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x50411e03, 0xffff00ff,
+		   SYSC_QUIRK_SWSUP_SIDLE_ACT),
+	SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x47422e03, 0xffffffff,
+		   SYSC_QUIRK_SWSUP_SIDLE_ACT),
+	SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x47424e03, 0xffffffff,
+		   SYSC_QUIRK_SWSUP_SIDLE_ACT),
 	SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, 0x14, 0x50700100, 0xffffffff,
 		   SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
 	SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, -ENODEV, 0x50700101, 0xffffffff,
 		   SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
+	SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000033,
+		   0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY |
+		   SYSC_MODULE_QUIRK_OTG),
+	SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000040,
+		   0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY |
+		   SYSC_MODULE_QUIRK_OTG),
 	SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050,
 		   0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY |
 		   SYSC_MODULE_QUIRK_OTG),
@@ -1808,7 +1765,7 @@ static u32 sysc_quirk_dispc(struct sysc *ddata, int dispc_offset,
 	if (!ddata->module_va)
 		return -EIO;
 
-	/* DISP_CONTROL */
+	/* DISP_CONTROL, shut down lcd and digit on disable if enabled */
 	val = sysc_read(ddata, dispc_offset + 0x40);
 	lcd_en = val & lcd_en_mask;
 	digit_en = val & digit_en_mask;
@@ -1820,7 +1777,7 @@ static u32 sysc_quirk_dispc(struct sysc *ddata, int dispc_offset,
 		else
 			irq_mask |= BIT(2) | BIT(3);	/* EVSYNC bits */
 	}
-	if (disable & (lcd_en | digit_en))
+	if (disable && (lcd_en || digit_en))
 		sysc_write(ddata, dispc_offset + 0x40,
 			   val & ~(lcd_en_mask | digit_en_mask));
 
@@ -1876,7 +1833,7 @@ static void sysc_pre_reset_quirk_dss(struct sysc *ddata)
 		dev_warn(ddata->dev, "%s: timed out %08x !+ %08x\n",
 			 __func__, val, irq_mask);
 
-	if (sysc_soc->soc == SOC_3430) {
+	if (sysc_soc->soc == SOC_3430 || sysc_soc->soc == SOC_AM35) {
 		/* Clear DSS_SDI_CONTROL */
 		sysc_write(ddata, 0x44, 0);
 
@@ -2031,6 +1988,21 @@ static void sysc_module_disable_quirk_pruss(struct sysc *ddata)
 	sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
 }
 
+static void sysc_module_enable_quirk_pruss(struct sysc *ddata)
+{
+	u32 reg;
+
+	reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
+
+	/*
+	 * Clearing the SYSC_PRUSS_STANDBY_INIT bit - Updates OCP master
+	 * port configuration to enable memory access outside of the
+	 * PRU-ICSS subsystem.
+	 */
+	reg &= (~SYSC_PRUSS_STANDBY_INIT);
+	sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
+}
+
 static void sysc_init_module_quirks(struct sysc *ddata)
 {
 	if (ddata->legacy_mode || !ddata->name)
@@ -2083,8 +2055,10 @@ static void sysc_init_module_quirks(struct sysc *ddata)
 		ddata->module_disable_quirk = sysc_reset_done_quirk_wdt;
 	}
 
-	if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_PRUSS)
+	if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_PRUSS) {
+		ddata->module_enable_quirk = sysc_module_enable_quirk_pruss;
 		ddata->module_disable_quirk = sysc_module_disable_quirk_pruss;
+	}
 }
 
 static int sysc_clockdomain_init(struct sysc *ddata)
@@ -2146,8 +2120,7 @@ static int sysc_reset(struct sysc *ddata)
 	sysc_offset = ddata->offsets[SYSC_SYSCONFIG];
 
 	if (ddata->legacy_mode ||
-	    ddata->cap->regbits->srst_shift < 0 ||
-	    ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)
+	    ddata->cap->regbits->srst_shift < 0)
 		return 0;
 
 	sysc_mask = BIT(ddata->cap->regbits->srst_shift);
@@ -2159,11 +2132,22 @@ static int sysc_reset(struct sysc *ddata)
 		sysc_val = sysc_read_sysconfig(ddata);
 		sysc_val |= sysc_mask;
 		sysc_write(ddata, sysc_offset, sysc_val);
-	}
 
-	if (ddata->cfg.srst_udelay)
-		usleep_range(ddata->cfg.srst_udelay,
-			     ddata->cfg.srst_udelay * 2);
+		/*
+		 * Some devices need a delay before reading registers
+		 * after reset. Presumably a srst_udelay is not needed
+		 * for devices that use a rstctrl register reset.
+		 */
+		if (ddata->cfg.srst_udelay)
+			fsleep(ddata->cfg.srst_udelay);
+
+		/*
+		 * Flush posted write. For devices needing srst_udelay
+		 * this should trigger an interconnect error if the
+		 * srst_udelay value is needed but not configured.
+		 */
+		sysc_val = sysc_read_sysconfig(ddata);
+	}
 
 	if (ddata->post_reset_quirk)
 		ddata->post_reset_quirk(ddata);
@@ -2187,9 +2171,8 @@ static int sysc_reset(struct sysc *ddata)
 static int sysc_init_module(struct sysc *ddata)
 {
 	bool rstctrl_deasserted = false;
-	int error = 0;
+	int error = sysc_clockdomain_init(ddata);
 
-	error = sysc_clockdomain_init(ddata);
 	if (error)
 		return error;
 
@@ -2230,12 +2213,14 @@ static int sysc_init_module(struct sysc *ddata)
 			goto err_main_clocks;
 	}
 
-	error = sysc_reset(ddata);
-	if (error)
-		dev_err(ddata->dev, "Reset failed with %d\n", error);
+	if (!(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)) {
+		error = sysc_reset(ddata);
+		if (error)
+			dev_err(ddata->dev, "Reset failed with %d\n", error);
 
-	if (error && !ddata->legacy_mode)
-		sysc_disable_module(ddata->dev);
+		if (error && !ddata->legacy_mode)
+			sysc_disable_module(ddata->dev);
+	}
 
 err_main_clocks:
 	if (error)
@@ -2273,11 +2258,9 @@ static int sysc_init_idlemode(struct sysc *ddata, u8 *idlemodes,
 			      const char *name)
 {
 	struct device_node *np = ddata->dev->of_node;
-	struct property *prop;
-	const __be32 *p;
 	u32 val;
 
-	of_property_for_each_u32(np, name, prop, p, val) {
+	of_property_for_each_u32(np, name, val) {
 		if (val >= SYSC_NR_IDLEMODES) {
 			dev_err(ddata->dev, "invalid idlemode: %i\n", val);
 			return -EINVAL;
@@ -2390,7 +2373,7 @@ static int sysc_child_add_clocks(struct sysc *ddata,
 	return 0;
 }
 
-static struct device_type sysc_device_type = {
+static const struct device_type sysc_device_type = {
 };
 
 static struct sysc *sysc_child_to_parent(struct device *dev)
@@ -2437,98 +2420,13 @@ static int __maybe_unused sysc_child_runtime_resume(struct device *dev)
 	return pm_generic_runtime_resume(dev);
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int sysc_child_suspend_noirq(struct device *dev)
-{
-	struct sysc *ddata;
-	int error;
-
-	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) {
-		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) {
-			dev_dbg(dev, "%s busy at %i: %i\n",
-				__func__, __LINE__, error);
-
-			return 0;
-		}
-
-		error = sysc_runtime_suspend(ddata->dev);
-		if (error) {
-			dev_err(dev, "%s error at %i: %i\n",
-				__func__, __LINE__, error);
-
-			return error;
-		}
-
-		ddata->child_needs_resume = true;
-	}
-
-	return 0;
-}
-
-static int sysc_child_resume_noirq(struct device *dev)
-{
-	struct sysc *ddata;
-	int error;
-
-	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;
-
-		error = sysc_runtime_resume(ddata->dev);
-		if (error)
-			dev_err(ddata->dev,
-				"%s runtime resume error: %i\n",
-				__func__, error);
-
-		error = pm_generic_runtime_resume(dev);
-		if (error)
-			dev_err(ddata->dev,
-				"%s generic runtime resume: %i\n",
-				__func__, error);
-	}
-
-	return pm_generic_resume_noirq(dev);
-}
-#endif
-
-static struct dev_pm_domain sysc_child_pm_domain = {
-	.ops = {
-		SET_RUNTIME_PM_OPS(sysc_child_runtime_suspend,
-				   sysc_child_runtime_resume,
-				   NULL)
-		USE_PLATFORM_PM_SLEEP_OPS
-		SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_child_suspend_noirq,
-					      sysc_child_resume_noirq)
-	}
-};
-
 /* Caller needs to take list_lock if ever used outside of cpu_pm */
 static void sysc_reinit_modules(struct sysc_soc_info *soc)
 {
 	struct sysc_module *module;
-	struct list_head *pos;
 	struct sysc *ddata;
 
-	list_for_each(pos, &sysc_soc->restored_modules) {
-		module = list_entry(pos, struct sysc_module, node);
+	list_for_each_entry(module, &sysc_soc->restored_modules, node) {
 		ddata = module->ddata;
 		sysc_reinit_module(ddata, ddata->enabled);
 	}
@@ -2592,25 +2490,6 @@ out_unlock:
 	mutex_unlock(&sysc_soc->list_lock);
 }
 
-/**
- * sysc_legacy_idle_quirk - handle children in omap_device compatible way
- * @ddata: device driver data
- * @child: child device driver
- *
- * Allow idle for child devices as done with _od_runtime_suspend().
- * Otherwise many child devices will not idle because of the permanent
- * parent usecount set in pm_runtime_irq_safe().
- *
- * Note that the long term solution is to just modify the child device
- * drivers to not set pm_runtime_irq_safe() and then this can be just
- * dropped.
- */
-static void sysc_legacy_idle_quirk(struct sysc *ddata, struct device *child)
-{
-	if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
-		dev_pm_domain_set(child, &sysc_child_pm_domain);
-}
-
 static int sysc_notifier_call(struct notifier_block *nb,
 			      unsigned long event, void *device)
 {
@@ -2627,7 +2506,6 @@ static int sysc_notifier_call(struct notifier_block *nb,
 		error = sysc_child_add_clocks(ddata, dev);
 		if (error)
 			return error;
-		sysc_legacy_idle_quirk(ddata, dev);
 		break;
 	default:
 		break;
@@ -2658,14 +2536,12 @@ static const struct sysc_dts_quirk sysc_dts_quirks[] = {
 static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
 				  bool is_child)
 {
-	const struct property *prop;
-	int i, len;
+	int i;
 
 	for (i = 0; i < ARRAY_SIZE(sysc_dts_quirks); i++) {
 		const char *name = sysc_dts_quirks[i].name;
 
-		prop = of_get_property(np, name, &len);
-		if (!prop)
+		if (!of_property_present(np, name))
 			continue;
 
 		ddata->cfg.quirks |= sysc_dts_quirks[i].mask;
@@ -2851,8 +2727,7 @@ static const struct sysc_capabilities sysc_34xx_sr = {
 	.type = TI_SYSC_OMAP34XX_SR,
 	.sysc_mask = SYSC_OMAP2_CLOCKACTIVITY,
 	.regbits = &sysc_regbits_omap34xx_sr,
-	.mod_quirks = SYSC_QUIRK_USE_CLOCKACT | SYSC_QUIRK_UNCACHED |
-		      SYSC_QUIRK_LEGACY_IDLE,
+	.mod_quirks = SYSC_QUIRK_USE_CLOCKACT | SYSC_QUIRK_UNCACHED,
 };
 
 /*
@@ -2873,13 +2748,12 @@ static const struct sysc_capabilities sysc_36xx_sr = {
 	.type = TI_SYSC_OMAP36XX_SR,
 	.sysc_mask = SYSC_OMAP3_SR_ENAWAKEUP,
 	.regbits = &sysc_regbits_omap36xx_sr,
-	.mod_quirks = SYSC_QUIRK_UNCACHED | SYSC_QUIRK_LEGACY_IDLE,
+	.mod_quirks = SYSC_QUIRK_UNCACHED,
 };
 
 static const struct sysc_capabilities sysc_omap4_sr = {
 	.type = TI_SYSC_OMAP4_SR,
 	.regbits = &sysc_regbits_omap36xx_sr,
-	.mod_quirks = SYSC_QUIRK_LEGACY_IDLE,
 };
 
 /*
@@ -3039,6 +2913,8 @@ static void ti_sysc_idle(struct work_struct *work)
 static const struct soc_device_attribute sysc_soc_match[] = {
 	SOC_FLAG("OMAP242*", SOC_2420),
 	SOC_FLAG("OMAP243*", SOC_2430),
+	SOC_FLAG("AM33*", SOC_AM33),
+	SOC_FLAG("AM35*", SOC_AM35),
 	SOC_FLAG("OMAP3[45]*", SOC_3430),
 	SOC_FLAG("OMAP3[67]*", SOC_3630),
 	SOC_FLAG("OMAP443*", SOC_4430),
@@ -3123,7 +2999,7 @@ static int sysc_init_static_data(struct sysc *ddata)
 
 	match = soc_device_match(sysc_soc_match);
 	if (match && match->data)
-		sysc_soc->soc = (int)match->data;
+		sysc_soc->soc = (enum sysc_soc)(uintptr_t)match->data;
 
 	/*
 	 * Check and warn about possible old incomplete dtb. We now want to see
@@ -3208,12 +3084,10 @@ static void sysc_cleanup_static_data(void)
 static int sysc_check_disabled_devices(struct sysc *ddata)
 {
 	struct sysc_address *disabled_module;
-	struct list_head *pos;
 	int error = 0;
 
 	mutex_lock(&sysc_soc->list_lock);
-	list_for_each(pos, &sysc_soc->disabled_modules) {
-		disabled_module = list_entry(pos, struct sysc_address, node);
+	list_for_each_entry(disabled_module, &sysc_soc->disabled_modules, node) {
 		if (ddata->module_pa == disabled_module->base) {
 			dev_dbg(ddata->dev, "module disabled for this SoC\n");
 			error = -ENODEV;
@@ -3245,10 +3119,15 @@ static int sysc_check_active_timer(struct sysc *ddata)
 	 * can be dropped if we stop supporting old beagleboard revisions
 	 * A to B4 at some point.
 	 */
-	if (sysc_soc->soc == SOC_3430)
+	switch (sysc_soc->soc) {
+	case SOC_AM33:
+	case SOC_3430:
+	case SOC_AM35:
 		error = -ENXIO;
-	else
+		break;
+	default:
 		error = -EBUSY;
+	}
 
 	if ((ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT) &&
 	    (ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE))
@@ -3390,7 +3269,7 @@ unprepare:
 	return error;
 }
 
-static int sysc_remove(struct platform_device *pdev)
+static void sysc_remove(struct platform_device *pdev)
 {
 	struct sysc *ddata = platform_get_drvdata(pdev);
 	int error;
@@ -3415,8 +3294,6 @@ static int sysc_remove(struct platform_device *pdev)
 
 unprepare:
 	sysc_unprepare(ddata);
-
-	return 0;
 }
 
 static const struct of_device_id sysc_match[] = {