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>

1 files changed, 17 insertions, 7 deletions

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 3d5db8c83b3c..1c217e89deb9 100644
--- 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_lookup(struct device_node *np,
 /**
  * _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_lookup(struct device_node *np,
  * 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(struct omap_hwmod *oh, void *data)
                          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(struct omap_hwmod *oh, void *data)
 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_hwmod *oh, void *data)
                 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;