dm: core: Add functions to read 8/16-bit integers

Add functions to read 8/16-bit integers like the existing functions for
32/64-bit to simplify read of 8/16-bit integers from device tree
properties.

Signed-off-by: Stefan Herbrechtsmeier <[email protected]>
Reviewed-by: Marek Vasut <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Reviewed-by: Simon Glass <[email protected]>

3 files changed, 137 insertions, 0 deletions

diff --git a/include/dm/of_access.h b/include/dm/of_access.h
index 5b7821d0a1b..83f34f0d2ad 100644
--- a/include/dm/of_access.h
+++ b/include/dm/of_access.h
@@ -265,6 +265,38 @@ struct device_node *of_find_node_by_prop_value(struct device_node *from,
 struct device_node *of_find_node_by_phandle(phandle handle);
 
 /**
+ * of_read_u8() - Find and read a 8-bit integer from a property
+ *
+ * Search for a property in a device node and read a 8-bit value from
+ * it.
+ *
+ * @np:		device node from which the property value is to be read.
+ * @propname:	name of the property to be searched.
+ * @outp:	pointer to return value, modified only if return value is 0.
+ *
+ * Return: 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.
+ */
+int of_read_u8(const struct device_node *np, const char *propname, u8 *outp);
+
+/**
+ * of_read_u16() - Find and read a 16-bit integer from a property
+ *
+ * Search for a property in a device node and read a 16-bit value from
+ * it.
+ *
+ * @np:		device node from which the property value is to be read.
+ * @propname:	name of the property to be searched.
+ * @outp:	pointer to return value, modified only if return value is 0.
+ *
+ * Return: 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.
+ */
+int of_read_u16(const struct device_node *np, const char *propname, u16 *outp);
+
+/**
  * of_read_u32() - Find and read a 32-bit integer from a property
  *
  * Search for a property in a device node and read a 32-bit value from
diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h
index 7ce1e4c6d91..f6085231bbd 100644
--- a/include/dm/ofnode.h
+++ b/include/dm/ofnode.h
@@ -222,6 +222,46 @@ static inline oftree oftree_default(void)
 bool ofnode_name_eq(ofnode node, const char *name);
 
 /**
+ * ofnode_read_u8() - Read a 8-bit integer from a property
+ *
+ * @node:	valid node reference to read property from
+ * @propname:	name of the property to read from
+ * @outp:	place to put value (if found)
+ * Return: 0 if OK, -ve on error
+ */
+int ofnode_read_u8(ofnode node, const char *propname, u8 *outp);
+
+/**
+ * ofnode_read_u8_default() - Read a 8-bit integer from a property
+ *
+ * @node:	valid node reference to read property from
+ * @propname:	name of the property to read from
+ * @def:	default value to return if the property has no value
+ * Return: property value, or @def if not found
+ */
+u8 ofnode_read_u8_default(ofnode node, const char *propname, u8 def);
+
+/**
+ * ofnode_read_u16() - Read a 16-bit integer from a property
+ *
+ * @node:	valid node reference to read property from
+ * @propname:	name of the property to read from
+ * @outp:	place to put value (if found)
+ * Return: 0 if OK, -ve on error
+ */
+int ofnode_read_u16(ofnode node, const char *propname, u16 *outp);
+
+/**
+ * ofnode_read_u16_default() - Read a 16-bit integer from a property
+ *
+ * @node:	valid node reference to read property from
+ * @propname:	name of the property to read from
+ * @def:	default value to return if the property has no value
+ * Return: property value, or @def if not found
+ */
+u16 ofnode_read_u16_default(ofnode node, const char *propname, u16 def);
+
+/**
  * ofnode_read_u32() - Read a 32-bit integer from a property
  *
  * @node:	valid node reference to read property from
diff --git a/include/dm/read.h b/include/dm/read.h
index 1b54b69acf0..122b9cd15b8 100644
--- a/include/dm/read.h
+++ b/include/dm/read.h
@@ -32,6 +32,47 @@ static inline const struct device_node *dev_np(const struct udevice *dev)
 
 #if !defined(CONFIG_DM_DEV_READ_INLINE) || CONFIG_IS_ENABLED(OF_PLATDATA)
 /**
+ * dev_read_u8() - read a 8-bit integer from a device's DT property
+ *
+ * @dev:	device to read DT property from
+ * @propname:	name of the property to read from
+ * @outp:	place to put value (if found)
+ * Return: 0 if OK, -ve on error
+ */
+int dev_read_u8(const struct udevice *dev, const char *propname, u8 *outp);
+
+/**
+ * dev_read_u8_default() - read a 8-bit integer from a device's DT property
+ *
+ * @dev:	device to read DT property from
+ * @propname:	name of the property to read from
+ * @def:	default value to return if the property has no value
+ * Return: property value, or @def if not found
+ */
+u8 dev_read_u8_default(const struct udevice *dev, const char *propname, u8 def);
+
+/**
+ * dev_read_u16() - read a 16-bit integer from a device's DT property
+ *
+ * @dev:	device to read DT property from
+ * @propname:	name of the property to read from
+ * @outp:	place to put value (if found)
+ * Return: 0 if OK, -ve on error
+ */
+int dev_read_u16(const struct udevice *dev, const char *propname, u16 *outp);
+
+/**
+ * dev_read_u16_default() - read a 16-bit integer from a device's DT property
+ *
+ * @dev:	device to read DT property from
+ * @propname:	name of the property to read from
+ * @def:	default value to return if the property has no value
+ * Return: property value, or @def if not found
+ */
+u16 dev_read_u16_default(const struct udevice *dev, const char *propname,
+			 u16 def);
+
+/**
  * dev_read_u32() - read a 32-bit integer from a device's DT property
  *
  * @dev:	device to read DT property from
@@ -772,6 +813,30 @@ phy_interface_t dev_read_phy_mode(const struct udevice *dev);
 #else /* CONFIG_DM_DEV_READ_INLINE is enabled */
 #include <asm/global_data.h>
 
+static inline int dev_read_u8(const struct udevice *dev,
+			      const char *propname, u8 *outp)
+{
+	return ofnode_read_u8(dev_ofnode(dev), propname, outp);
+}
+
+static inline int dev_read_u8_default(const struct udevice *dev,
+				      const char *propname, u8 def)
+{
+	return ofnode_read_u8_default(dev_ofnode(dev), propname, def);
+}
+
+static inline int dev_read_u16(const struct udevice *dev,
+			       const char *propname, u16 *outp)
+{
+	return ofnode_read_u16(dev_ofnode(dev), propname, outp);
+}
+
+static inline int dev_read_u16_default(const struct udevice *dev,
+				       const char *propname, u16 def)
+{
+	return ofnode_read_u16_default(dev_ofnode(dev), propname, def);
+}
+
 static inline int dev_read_u32(const struct udevice *dev,
 			       const char *propname, u32 *outp)
 {