Merge tag 'dt-for-3.7' of git://sources.calxeda.com/kernel/linux

Pull devicetree updates from Rob Herring:
 - Import of latest upstream device tree compiler (dtc)
 - New function of_get_child_by_name
 - Support for #size-cells of 0 and #addr-cells of >2
 - Couple of DT binding documentation updates

Fix up trivial conflicts due to of_get_child_by_name() having been added
next to the new of_get_next_available_child().

* tag 'dt-for-3.7' of git://sources.calxeda.com/kernel/linux:
  MAINTAINERS: add scripts/dtc under Devicetree maintainers
  dtc: import latest upstream dtc
  dt: Document general interrupt controller bindings
  dt/s3c64xx/spi: Use of_get_child_by_name to get a named child
  dt: introduce of_get_child_by_name to get child node by name
  of: i2c: add support for wakeup-source property
  of/address: Handle #address-cells > 2 specially
  DT: export of_irq_to_resource_table()
  devicetree: serial: Add documentation for imx serial
  devicetree: pwm: mxs-pwm.txt: Fix reg field annotation
  of: Allow busses with #size-cells=0

5 files changed, 71 insertions, 7 deletions

diff --git a/drivers/of/address.c b/drivers/of/address.c
index 7e262a6124c..72e496f1e9b 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -9,8 +9,8 @@
 
 /* Max address size we deal with */
 #define OF_MAX_ADDR_CELLS       4
-#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
-                        (ns) > 0)
+#define OF_CHECK_ADDR_COUNT(na) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS)
+#define OF_CHECK_COUNTS(na, ns) (OF_CHECK_ADDR_COUNT(na) && (ns) > 0)
 
 static struct of_bus *of_match_bus(struct device_node *np);
 static int __of_address_to_resource(struct device_node *dev,
@@ -69,6 +69,14 @@ static u64 of_bus_default_map(u32 *addr, const __be32 *range,
                  (unsigned long long)cp, (unsigned long long)s,
                  (unsigned long long)da);
 
+        /*
+         * If the number of address cells is larger than 2 we assume the
+         * mapping doesn't specify a physical address. Rather, the address
+         * specifies an identifier that must match exactly.
+         */
+        if (na > 2 && memcmp(range, addr, na * 4) != 0)
+                return OF_BAD_ADDR;
+
         if (da < cp || da >= (cp + s))
                 return OF_BAD_ADDR;
         return da - cp;
@@ -182,7 +190,7 @@ const __be32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
         }
         bus->count_cells(dev, &na, &ns);
         of_node_put(parent);
-        if (!OF_CHECK_COUNTS(na, ns))
+        if (!OF_CHECK_ADDR_COUNT(na))
                 return NULL;
 
         /* Get "reg" or "assigned-addresses" property */
@@ -490,6 +498,25 @@ u64 of_translate_dma_address(struct device_node *dev, const __be32 *in_addr)
 }
 EXPORT_SYMBOL(of_translate_dma_address);
 
+bool of_can_translate_address(struct device_node *dev)
+{
+        struct device_node *parent;
+        struct of_bus *bus;
+        int na, ns;
+
+        parent = of_get_parent(dev);
+        if (parent == NULL)
+                return false;
+
+        bus = of_match_bus(parent);
+        bus->count_cells(dev, &na, &ns);
+
+        of_node_put(parent);
+
+        return OF_CHECK_COUNTS(na, ns);
+}
+EXPORT_SYMBOL(of_can_translate_address);
+
 const __be32 *of_get_address(struct device_node *dev, int index, u64 *size,
                     unsigned int *flags)
 {
@@ -506,7 +533,7 @@ const __be32 *of_get_address(struct device_node *dev, int index, u64 *size,
         bus = of_match_bus(parent);
         bus->count_cells(dev, &na, &ns);
         of_node_put(parent);
-        if (!OF_CHECK_COUNTS(na, ns))
+        if (!OF_CHECK_ADDR_COUNT(na))
                 return NULL;
 
         /* Get "reg" or "assigned-addresses" property */
diff --git a/drivers/of/base.c b/drivers/of/base.c
index d4a1c9a043e..af3b22ac762 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -391,6 +391,29 @@ struct device_node *of_get_next_available_child(const struct device_node *node,
 EXPORT_SYMBOL(of_get_next_available_child);
 
 /**
+ *      of_get_child_by_name - Find the child node by name for a given parent
+ *      @node:  parent node
+ *      @name:  child name to look for.
+ *
+ *      This function looks for child node for given matching name
+ *
+ *      Returns a node pointer if found, with refcount incremented, use
+ *      of_node_put() on it when done.
+ *      Returns NULL if node is not found.
+ */
+struct device_node *of_get_child_by_name(const struct device_node *node,
+                                const char *name)
+{
+        struct device_node *child;
+
+        for_each_child_of_node(node, child)
+                if (child->name && (of_node_cmp(child->name, name) == 0))
+                        break;
+        return child;
+}
+EXPORT_SYMBOL(of_get_child_by_name);
+
+/**
  *      of_find_node_by_path - Find a node matching a full OF path
  *      @path:  The full path to match
  *
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index ff8ab7b2737..a23ec777999 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -392,6 +392,7 @@ int of_irq_to_resource_table(struct device_node *dev, struct resource *res,
 
         return i;
 }
+EXPORT_SYMBOL_GPL(of_irq_to_resource_table);
 
 struct intc_desc {
         struct list_head        list;
diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c
index 1e173f35767..3550f3bf4f9 100644
--- a/drivers/of/of_i2c.c
+++ b/drivers/of/of_i2c.c
@@ -61,6 +61,9 @@ void of_i2c_register_devices(struct i2c_adapter *adap)
                 info.of_node = of_node_get(node);
                 info.archdata = &dev_ad;
 
+                if (of_get_property(node, "wakeup-source", NULL))
+                        info.flags |= I2C_CLIENT_WAKE;
+
                 request_module("%s%s", I2C_MODULE_PREFIX, info.type);
 
                 result = i2c_new_device(adap, &info);
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index e44f8c2d239..9bdeaf30b17 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -78,6 +78,7 @@ void of_device_make_bus_id(struct device *dev)
         struct device_node *node = dev->of_node;
         const u32 *reg;
         u64 addr;
+        const __be32 *addrp;
         int magic;
 
 #ifdef CONFIG_PPC_DCR
@@ -105,7 +106,15 @@ void of_device_make_bus_id(struct device *dev)
          */
         reg = of_get_property(node, "reg", NULL);
         if (reg) {
-                addr = of_translate_address(node, reg);
+                if (of_can_translate_address(node)) {
+                        addr = of_translate_address(node, reg);
+                } else {
+                        addrp = of_get_address(node, 0, NULL, NULL);
+                        if (addrp)
+                                addr = of_read_number(addrp, 1);
+                        else
+                                addr = OF_BAD_ADDR;
+                }
                 if (addr != OF_BAD_ADDR) {
                         dev_set_name(dev, "%llx.%s",
                                      (unsigned long long)addr, node->name);
@@ -140,8 +149,9 @@ struct platform_device *of_device_alloc(struct device_node *np,
                 return NULL;
 
         /* count the io and irq resources */
-        while (of_address_to_resource(np, num_reg, &temp_res) == 0)
-                num_reg++;
+        if (of_can_translate_address(np))
+                while (of_address_to_resource(np, num_reg, &temp_res) == 0)
+                        num_reg++;
         num_irq = of_irq_count(np);
 
         /* Populate the resource table */