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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-12-08 19:50:17 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-12-08 19:50:17 +0100
commitd3eaf5875e36b37f1386a4e3e7562c5a6c35abd2 (patch)
tree13f5b6c391ad74a072a4f77f74e958a6ac287032 /drivers/of
parentb2776bf7149bddd1f4161f14f79520f17fc1d71d (diff)
parent29470ea8d828e4dec74e94f7f17b7479ff5ef276 (diff)
Merge branch 'device-properties'
* device-properties: leds: leds-gpio: Fix multiple instances registration without 'label' property leds: leds-gpio: Fix legacy GPIO number case ACPI / property: Drop size_prop from acpi_dev_get_property_reference() leds: leds-gpio: Convert gpio_blink_set() to use GPIO descriptors ACPI / GPIO: Document ACPI GPIO mappings API net: rfkill: gpio: Add default GPIO driver mappings for ACPI ACPI / GPIO: Driver GPIO mappings for ACPI GPIOs input: gpio_keys_polled: Make use of device property API leds: leds-gpio: Make use of device property API gpio: Support for unified device properties interface Driver core: Unified interface for firmware node properties input: gpio_keys_polled: Add support for GPIO descriptors leds: leds-gpio: Add support for GPIO descriptors gpio: sch: Consolidate core and resume banks gpio / ACPI: Add support for _DSD device properties misc: at25: Make use of device property API ACPI: Allow drivers to match using Device Tree compatible property Driver core: Unified device properties interface for platform firmware ACPI: Add support for device specific properties
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/base.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 3823edf2d012..4c2ccde42427 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1250,6 +1250,39 @@ int of_property_read_u64(const struct device_node *np, const char *propname,
EXPORT_SYMBOL_GPL(of_property_read_u64);
/**
+ * of_property_read_u64_array - Find and read an array of 64 bit integers
+ * from a property.
+ *
+ * @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
+ *
+ * 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.
+ *
+ * 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,
+ const char *propname, u64 *out_values,
+ size_t sz)
+{
+ const __be32 *val = of_find_property_value_of_size(np, propname,
+ (sz * sizeof(*out_values)));
+
+ if (IS_ERR(val))
+ return PTR_ERR(val);
+
+ while (sz--) {
+ *out_values++ = of_read_number(val, 2);
+ val += 2;
+ }
+ return 0;
+}
+
+/**
* of_property_read_string - Find and read a string from a property
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.