*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
- * @len: requested length of property value
+ * @min: minimum allowed length of property value
+ * @max: maximum allowed length of property value (0 means unlimited)
+ * @len: if !=NULL, actual length is written to here
*
* Search for a property in a device node and valid the requested size.
* Returns the property value on success, -EINVAL if the property does not
* exist, -ENODATA if property does not have a value, and -EOVERFLOW if the
- * property data isn't large enough.
+ * property data is too small or too large.
*
*/
static void *of_find_property_value_of_size(const struct device_node *np,
- const char *propname, u32 len)
+ const char *propname, u32 min, u32 max, size_t *len)
{
struct property *prop = of_find_property(np, propname, NULL);
return ERR_PTR(-EINVAL);
if (!prop->value)
return ERR_PTR(-ENODATA);
- if (len > prop->length)
+ if (prop->length < min)
+ return ERR_PTR(-EOVERFLOW);
+ if (max && prop->length > max)
return ERR_PTR(-EOVERFLOW);
+ if (len)
+ *len = prop->length;
+
return prop->value;
}
u32 index, u32 *out_value)
{
const u32 *val = of_find_property_value_of_size(np, propname,
- ((index + 1) * sizeof(*out_value)));
+ ((index + 1) * sizeof(*out_value)),
+ 0,
+ NULL);
if (IS_ERR(val))
return PTR_ERR(val);
EXPORT_SYMBOL_GPL(of_property_read_u32_index);
/**
- * of_property_read_u8_array - Find and read an array of u8 from a property.
+ * of_property_read_variable_u8_array - Find and read an array of u8 from a
+ * property, with bounds on the minimum and maximum array size.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_values: pointer to return value, modified only if return value is 0.
- * @sz: number of array elements to read
+ * @sz_min: minimum number of array elements to read
+ * @sz_max: maximum number of array elements to read, if zero there is no
+ * upper limit on the number of elements in the dts entry but only
+ * sz_min will be read.
*
* Search for a property in a device node and read 8-bit value(s) from
- * it. Returns 0 on success, -EINVAL if the property does not exist,
- * -ENODATA if property does not have a value, and -EOVERFLOW if the
- * property data isn't large enough.
+ * it. Returns number of elements read on success, -EINVAL if the property
+ * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
+ * if the property data is smaller than sz_min or longer than sz_max.
*
* dts entry of array should be like:
* property = /bits/ 8 <0x50 0x60 0x70>;
*
* The out_values is modified only if a valid u8 value can be decoded.
*/
-int of_property_read_u8_array(const struct device_node *np,
- const char *propname, u8 *out_values, size_t sz)
+int of_property_read_variable_u8_array(const struct device_node *np,
+ const char *propname, u8 *out_values,
+ size_t sz_min, size_t sz_max)
{
+ size_t sz, count;
const u8 *val = of_find_property_value_of_size(np, propname,
- (sz * sizeof(*out_values)));
+ (sz_min * sizeof(*out_values)),
+ (sz_max * sizeof(*out_values)),
+ &sz);
if (IS_ERR(val))
return PTR_ERR(val);
- while (sz--)
+ if (!sz_max)
+ sz = sz_min;
+ else
+ sz /= sizeof(*out_values);
+
+ count = sz;
+ while (count--)
*out_values++ = *val++;
- return 0;
+
+ return sz;
}
-EXPORT_SYMBOL_GPL(of_property_read_u8_array);
+EXPORT_SYMBOL_GPL(of_property_read_variable_u8_array);
/**
- * of_property_read_u16_array - Find and read an array of u16 from a property.
+ * of_property_read_variable_u16_array - Find and read an array of u16 from a
+ * property, with bounds on the minimum and maximum array size.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_values: pointer to return value, modified only if return value is 0.
- * @sz: number of array elements to read
+ * @sz_min: minimum number of array elements to read
+ * @sz_max: maximum number of array elements to read, if zero there is no
+ * upper limit on the number of elements in the dts entry but only
+ * sz_min will be read.
*
* Search for a property in a device node and read 16-bit value(s) from
- * it. Returns 0 on success, -EINVAL if the property does not exist,
- * -ENODATA if property does not have a value, and -EOVERFLOW if the
- * property data isn't large enough.
+ * it. Returns number of elements read on success, -EINVAL if the property
+ * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
+ * if the property data is smaller than sz_min or longer than sz_max.
*
* dts entry of array should be like:
* property = /bits/ 16 <0x5000 0x6000 0x7000>;
*
* The out_values is modified only if a valid u16 value can be decoded.
*/
-int of_property_read_u16_array(const struct device_node *np,
- const char *propname, u16 *out_values, size_t sz)
+int of_property_read_variable_u16_array(const struct device_node *np,
+ const char *propname, u16 *out_values,
+ size_t sz_min, size_t sz_max)
{
+ size_t sz, count;
const __be16 *val = of_find_property_value_of_size(np, propname,
- (sz * sizeof(*out_values)));
+ (sz_min * sizeof(*out_values)),
+ (sz_max * sizeof(*out_values)),
+ &sz);
if (IS_ERR(val))
return PTR_ERR(val);
- while (sz--)
+ if (!sz_max)
+ sz = sz_min;
+ else
+ sz /= sizeof(*out_values);
+
+ count = sz;
+ while (count--)
*out_values++ = be16_to_cpup(val++);
- return 0;
+
+ return sz;
}
-EXPORT_SYMBOL_GPL(of_property_read_u16_array);
+EXPORT_SYMBOL_GPL(of_property_read_variable_u16_array);
/**
- * of_property_read_u32_array - Find and read an array of 32 bit integers
- * from a property.
+ * of_property_read_variable_u32_array - Find and read an array of 32 bit
+ * integers from a property, with bounds on the minimum and maximum array size.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_values: pointer to return value, modified only if return value is 0.
- * @sz: number of array elements to read
+ * @sz_min: minimum number of array elements to read
+ * @sz_max: maximum number of array elements to read, if zero there is no
+ * upper limit on the number of elements in the dts entry but only
+ * sz_min will be read.
*
* Search for a property in a device node and read 32-bit value(s) from
- * it. Returns 0 on success, -EINVAL if the property does not exist,
- * -ENODATA if property does not have a value, and -EOVERFLOW if the
- * property data isn't large enough.
+ * it. Returns number of elements read on success, -EINVAL if the property
+ * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
+ * if the property data is smaller than sz_min or longer than sz_max.
*
* The out_values is modified only if a valid u32 value can be decoded.
*/
-int of_property_read_u32_array(const struct device_node *np,
+int of_property_read_variable_u32_array(const struct device_node *np,
const char *propname, u32 *out_values,
- size_t sz)
+ size_t sz_min, size_t sz_max)
{
+ size_t sz, count;
const __be32 *val = of_find_property_value_of_size(np, propname,
- (sz * sizeof(*out_values)));
+ (sz_min * sizeof(*out_values)),
+ (sz_max * sizeof(*out_values)),
+ &sz);
if (IS_ERR(val))
return PTR_ERR(val);
- while (sz--)
+ if (!sz_max)
+ sz = sz_min;
+ else
+ sz /= sizeof(*out_values);
+
+ count = sz;
+ while (count--)
*out_values++ = be32_to_cpup(val++);
- return 0;
+
+ return sz;
}
-EXPORT_SYMBOL_GPL(of_property_read_u32_array);
+EXPORT_SYMBOL_GPL(of_property_read_variable_u32_array);
/**
* of_property_read_u64 - Find and read a 64 bit integer from a property
u64 *out_value)
{
const __be32 *val = of_find_property_value_of_size(np, propname,
- sizeof(*out_value));
+ sizeof(*out_value),
+ 0,
+ NULL);
if (IS_ERR(val))
return PTR_ERR(val);
EXPORT_SYMBOL_GPL(of_property_read_u64);
/**
- * of_property_read_u64_array - Find and read an array of 64 bit integers
- * from a property.
+ * of_property_read_variable_u64_array - Find and read an array of 64 bit
+ * integers from a property, with bounds on the minimum and maximum array size.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_values: pointer to return value, modified only if return value is 0.
- * @sz: number of array elements to read
+ * @sz_min: minimum number of array elements to read
+ * @sz_max: maximum number of array elements to read, if zero there is no
+ * upper limit on the number of elements in the dts entry but only
+ * sz_min will be read.
*
* Search for a property in a device node and read 64-bit value(s) from
- * it. Returns 0 on success, -EINVAL if the property does not exist,
- * -ENODATA if property does not have a value, and -EOVERFLOW if the
- * property data isn't large enough.
+ * it. Returns number of elements read on success, -EINVAL if the property
+ * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
+ * if the property data is smaller than sz_min or longer than sz_max.
*
* The out_values is modified only if a valid u64 value can be decoded.
*/
-int of_property_read_u64_array(const struct device_node *np,
+int of_property_read_variable_u64_array(const struct device_node *np,
const char *propname, u64 *out_values,
- size_t sz)
+ size_t sz_min, size_t sz_max)
{
+ size_t sz, count;
const __be32 *val = of_find_property_value_of_size(np, propname,
- (sz * sizeof(*out_values)));
+ (sz_min * sizeof(*out_values)),
+ (sz_max * sizeof(*out_values)),
+ &sz);
if (IS_ERR(val))
return PTR_ERR(val);
- while (sz--) {
+ if (!sz_max)
+ sz = sz_min;
+ else
+ sz /= sizeof(*out_values);
+
+ count = sz;
+ while (count--) {
*out_values++ = of_read_number(val, 2);
val += 2;
}
- return 0;
+
+ return sz;
}
-EXPORT_SYMBOL_GPL(of_property_read_u64_array);
+EXPORT_SYMBOL_GPL(of_property_read_variable_u64_array);
/**
* of_property_read_string - Find and read a string from a property
name = of_get_property(of_aliases, "stdout", NULL);
if (name)
of_stdout = of_find_node_opts_by_path(name, &of_stdout_options);
+ if (of_stdout)
+ console_set_by_of();
}
if (!of_aliases)
projects / cascardo / linux.git / blobdiff