summaryrefslogtreecommitdiff
path: root/drivers/base/property.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/base/property.c')
-rw-r--r--drivers/base/property.c120
1 files changed, 100 insertions, 20 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c
index 2d75366c6..1325ff225 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -134,7 +134,7 @@ bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname)
if (is_of_node(fwnode))
return of_property_read_bool(to_of_node(fwnode), propname);
else if (is_acpi_node(fwnode))
- return !acpi_dev_prop_get(to_acpi_node(fwnode), propname, NULL);
+ return !acpi_node_prop_get(fwnode, propname, NULL);
return !!pset_prop_get(to_pset(fwnode), propname);
}
@@ -287,6 +287,28 @@ int device_property_read_string(struct device *dev, const char *propname,
}
EXPORT_SYMBOL_GPL(device_property_read_string);
+/**
+ * device_property_match_string - find a string in an array and return index
+ * @dev: Device to get the property of
+ * @propname: Name of the property holding the array
+ * @string: String to look for
+ *
+ * Find a given string in a string array and if it is found return the
+ * index back.
+ *
+ * Return: %0 if the property was found (success),
+ * %-EINVAL if given arguments are not valid,
+ * %-ENODATA if the property does not have a value,
+ * %-EPROTO if the property is not an array of strings,
+ * %-ENXIO if no suitable firmware interface is present.
+ */
+int device_property_match_string(struct device *dev, const char *propname,
+ const char *string)
+{
+ return fwnode_property_match_string(dev_fwnode(dev), propname, string);
+}
+EXPORT_SYMBOL_GPL(device_property_match_string);
+
#define OF_DEV_PROP_READ_ARRAY(node, propname, type, val, nval) \
(val) ? of_property_read_##type##_array((node), (propname), (val), (nval)) \
: of_property_count_elems_of_size((node), (propname), sizeof(type))
@@ -298,8 +320,8 @@ EXPORT_SYMBOL_GPL(device_property_read_string);
_ret_ = OF_DEV_PROP_READ_ARRAY(to_of_node(_fwnode_), _propname_, \
_type_, _val_, _nval_); \
else if (is_acpi_node(_fwnode_)) \
- _ret_ = acpi_dev_prop_read(to_acpi_node(_fwnode_), _propname_, \
- _proptype_, _val_, _nval_); \
+ _ret_ = acpi_node_prop_read(_fwnode_, _propname_, _proptype_, \
+ _val_, _nval_); \
else if (is_pset(_fwnode_)) \
_ret_ = pset_prop_read_array(to_pset(_fwnode_), _propname_, \
_proptype_, _val_, _nval_); \
@@ -440,8 +462,8 @@ int fwnode_property_read_string_array(struct fwnode_handle *fwnode,
propname, val, nval) :
of_property_count_strings(to_of_node(fwnode), propname);
else if (is_acpi_node(fwnode))
- return acpi_dev_prop_read(to_acpi_node(fwnode), propname,
- DEV_PROP_STRING, val, nval);
+ return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING,
+ val, nval);
else if (is_pset(fwnode))
return pset_prop_read_array(to_pset(fwnode), propname,
DEV_PROP_STRING, val, nval);
@@ -470,8 +492,8 @@ int fwnode_property_read_string(struct fwnode_handle *fwnode,
if (is_of_node(fwnode))
return of_property_read_string(to_of_node(fwnode), propname, val);
else if (is_acpi_node(fwnode))
- return acpi_dev_prop_read(to_acpi_node(fwnode), propname,
- DEV_PROP_STRING, val, 1);
+ return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING,
+ val, 1);
return pset_prop_read_array(to_pset(fwnode), propname,
DEV_PROP_STRING, val, 1);
@@ -479,6 +501,52 @@ int fwnode_property_read_string(struct fwnode_handle *fwnode,
EXPORT_SYMBOL_GPL(fwnode_property_read_string);
/**
+ * fwnode_property_match_string - find a string in an array and return index
+ * @fwnode: Firmware node to get the property of
+ * @propname: Name of the property holding the array
+ * @string: String to look for
+ *
+ * Find a given string in a string array and if it is found return the
+ * index back.
+ *
+ * Return: %0 if the property was found (success),
+ * %-EINVAL if given arguments are not valid,
+ * %-ENODATA if the property does not have a value,
+ * %-EPROTO if the property is not an array of strings,
+ * %-ENXIO if no suitable firmware interface is present.
+ */
+int fwnode_property_match_string(struct fwnode_handle *fwnode,
+ const char *propname, const char *string)
+{
+ const char **values;
+ int nval, ret, i;
+
+ nval = fwnode_property_read_string_array(fwnode, propname, NULL, 0);
+ if (nval < 0)
+ return nval;
+
+ values = kcalloc(nval, sizeof(*values), GFP_KERNEL);
+ if (!values)
+ return -ENOMEM;
+
+ ret = fwnode_property_read_string_array(fwnode, propname, values, nval);
+ if (ret < 0)
+ goto out;
+
+ ret = -ENODATA;
+ for (i = 0; i < nval; i++) {
+ if (!strcmp(values[i], string)) {
+ ret = i;
+ break;
+ }
+ }
+out:
+ kfree(values);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(fwnode_property_match_string);
+
+/**
* device_get_next_child_node - Return the next child node handle for a device
* @dev: Device to find the next child node for.
* @child: Handle to one of the device's child nodes or a null handle.
@@ -493,11 +561,7 @@ struct fwnode_handle *device_get_next_child_node(struct device *dev,
if (node)
return &node->fwnode;
} else if (IS_ENABLED(CONFIG_ACPI)) {
- struct acpi_device *node;
-
- node = acpi_get_next_child(dev, to_acpi_node(child));
- if (node)
- return acpi_fwnode_handle(node);
+ return acpi_get_next_subnode(dev, child);
}
return NULL;
}
@@ -534,18 +598,34 @@ unsigned int device_get_child_node_count(struct device *dev)
}
EXPORT_SYMBOL_GPL(device_get_child_node_count);
-bool device_dma_is_coherent(struct device *dev)
+bool device_dma_supported(struct device *dev)
{
- bool coherent = false;
-
+ /* For DT, this is always supported.
+ * For ACPI, this depends on CCA, which
+ * is determined by the acpi_dma_supported().
+ */
if (IS_ENABLED(CONFIG_OF) && dev->of_node)
- coherent = of_dma_is_coherent(dev->of_node);
- else
- acpi_check_dma(ACPI_COMPANION(dev), &coherent);
+ return true;
+
+ return acpi_dma_supported(ACPI_COMPANION(dev));
+}
+EXPORT_SYMBOL_GPL(device_dma_supported);
+
+enum dev_dma_attr device_get_dma_attr(struct device *dev)
+{
+ enum dev_dma_attr attr = DEV_DMA_NOT_SUPPORTED;
- return coherent;
+ if (IS_ENABLED(CONFIG_OF) && dev->of_node) {
+ if (of_dma_is_coherent(dev->of_node))
+ attr = DEV_DMA_COHERENT;
+ else
+ attr = DEV_DMA_NON_COHERENT;
+ } else
+ attr = acpi_get_dma_attr(ACPI_COMPANION(dev));
+
+ return attr;
}
-EXPORT_SYMBOL_GPL(device_dma_is_coherent);
+EXPORT_SYMBOL_GPL(device_get_dma_attr);
/**
* device_get_phy_mode - Get phy mode for given device