openwrt/target/linux/omap/patches-3.12/202-ARM-OMAP2-hwmod-Extract-no-idle-and-no-reset-info-from-DT.patch

From f92d9597f781f6a5a39c73dc71604bd8a21c5299 Mon Sep 17 00:00:00 2001
From: Rajendra Nayak <rnayak@ti.com>
Date: Wed, 09 Oct 2013 07:26:55 +0000
Subject: ARM: OMAP2+: hwmod: Extract no-idle and no-reset info from DT

Now that we have DT bindings to specify which devices should not
be reset and idled during init, make hwmod extract the information
(and store them in internal flags) from Device tree.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: updated to apply]
Signed-off-by: Paul Walmsley <paul@pwsan.com>

---
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -2357,6 +2357,8 @@ static struct device_node *of_dev_hwmod_
 /**
  * _init_mpu_rt_base - populate the virtual address for a hwmod
  * @oh: struct omap_hwmod * to locate the virtual address
+ * @data: (unused, caller should pass NULL)
+ * @np: struct device_node * of the IP block's device node in the DT data
  *
  * Cache the virtual address used by the MPU to access this IP block's
  * registers.  This address is needed early so the OCP registers that
@@ -2365,11 +2367,11 @@ static struct device_node *of_dev_hwmod_
  * Returns 0 on success, -EINVAL if an invalid hwmod is passed, and
  * -ENXIO on absent or invalid register target address space.
  */
-static int __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data)
+static int __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data,
+				    struct device_node *np)
 {
 	struct omap_hwmod_addr_space *mem;
 	void __iomem *va_start = NULL;
-	struct device_node *np;
 
 	if (!oh)
 		return -EINVAL;
@@ -2385,12 +2387,10 @@ static int __init _init_mpu_rt_base(stru
 			 oh->name);
 
 		/* Extract the IO space from device tree blob */
-		if (!of_have_populated_dt())
+		if (!np)
 			return -ENXIO;
 
-		np = of_dev_hwmod_lookup(of_find_node_by_name(NULL, "ocp"), oh);
-		if (np)
-			va_start = of_iomap(np, oh->mpu_rt_idx);
+		va_start = of_iomap(np, oh->mpu_rt_idx);
 	} else {
 		va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start);
 	}
@@ -2423,12 +2423,16 @@ static int __init _init_mpu_rt_base(stru
 static int __init _init(struct omap_hwmod *oh, void *data)
 {
 	int r;
+	struct device_node *np = NULL;
 
 	if (oh->_state != _HWMOD_STATE_REGISTERED)
 		return 0;
 
+	if (of_have_populated_dt())
+		np = of_dev_hwmod_lookup(of_find_node_by_name(NULL, "ocp"), oh);
+
 	if (oh->class->sysc) {
-		r = _init_mpu_rt_base(oh, NULL);
+		r = _init_mpu_rt_base(oh, NULL, np);
 		if (r < 0) {
 			WARN(1, "omap_hwmod: %s: doesn't have mpu register target base\n",
 			     oh->name);
@@ -2442,6 +2446,12 @@ static int __init _init(struct omap_hwmo
 		return -EINVAL;
 	}
 
+	if (np)
+		if (of_find_property(np, "ti,no-reset-on-init", NULL))
+			oh->flags |= HWMOD_INIT_NO_RESET;
+		if (of_find_property(np, "ti,no-idle-on-init", NULL))
+			oh->flags |= HWMOD_INIT_NO_IDLE;
+
 	oh->_state = _HWMOD_STATE_INITIALIZED;
 
 	return 0;