summaryrefslogtreecommitdiffstats
path: root/drivers/of
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-03 09:44:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-03 09:44:08 -0700
commita54dfb1a845c38a97686268d8c4086a63d9493aa (patch)
tree3b31c81672fa89102aae929cc6c1e48e6e9382f4 /drivers/of
parenteb0ad9c06d51edb5d18a7007fd4d77a8805b2ba7 (diff)
parent36165f55055781a0e4bf32d775241796414504b0 (diff)
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
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/address.c35
-rw-r--r--drivers/of/base.c23
-rw-r--r--drivers/of/irq.c1
-rw-r--r--drivers/of/of_i2c.c3
-rw-r--r--drivers/of/platform.c16
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 */