Fix use of conditional LMB

[oweals/u-boot.git] / include / fdtdec.h

diff --git a/include/fdtdec.h b/include/fdtdec.h
index 341e6a18a0a87b8970fc4c9f6abb884a8cc7d40f..5164ce24e61e2686ae6fb664862dfc8363a4238f 100644 (file)
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -89,6 +89,22 @@ struct fdt_gpio_state {
 /* This tells us whether a fdt_gpio_state record is valid or not */
 #define fdt_gpio_isvalid(x) ((x)->gpio != FDT_GPIO_NONE)
 
+/**
+ * Read the GPIO taking into account the polarity of the pin.
+ *
+ * @param gpio         pointer to the decoded gpio
+ * @return value of the gpio if successful, < 0 if unsuccessful
+ */
+int fdtdec_get_gpio(struct fdt_gpio_state *gpio);
+
+/**
+ * Write the GPIO taking into account the polarity of the pin.
+ *
+ * @param gpio         pointer to the decoded gpio
+ * @return 0 if successful
+ */
+int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val);
+
 /**
  * Find the next numbered alias for a peripheral. This is used to enumerate
  * all the peripherals of a certain type.
@@ -109,6 +125,19 @@ struct fdt_gpio_state {
 int fdtdec_next_alias(const void *blob, const char *name,
                enum fdt_compat_id id, int *upto);
 
+/**
+ * Find the compatible ID for a given node.
+ *
+ * Generally each node has at least one compatible string attached to it.
+ * This function looks through our list of known compatible strings and
+ * returns the corresponding ID which matches the compatible string.
+ *
+ * @param blob         FDT blob to use
+ * @param node         Node containing compatible string to find
+ * @return compatible ID, or COMPAT_UNKNOWN if we cannot find a match
+ */
+enum fdt_compat_id fdtdec_lookup(const void *blob, int node);
+
 /**
  * Find the next compatible node for a peripheral.
  *
@@ -168,6 +197,21 @@ fdt_addr_t fdtdec_get_addr(const void *blob, int node,
 s32 fdtdec_get_int(const void *blob, int node, const char *prop_name,
                s32 default_val);
 
+/**
+ * Look up a 64-bit integer property in a node and return it. The property
+ * must have at least 8 bytes of data (2 cells). The first two cells are
+ * concatenated to form a 8 bytes value, where the first cell is top half and
+ * the second cell is bottom half.
+ *
+ * @param blob FDT blob
+ * @param node node to examine
+ * @param prop_name    name of property to find
+ * @param default_val  default value to return if the property is not found
+ * @return integer value, if found, or default_val if not
+ */
+uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
+               uint64_t default_val);
+
 /**
  * Checks whether a node is enabled.
  * This looks for a 'status' property. If this exists, then returns 1 if
@@ -344,6 +388,22 @@ int fdtdec_get_bool(const void *blob, int node, const char *prop_name);
 int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
                struct fdt_gpio_state *gpio);
 
+/**
+ * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no
+ * terminating item.
+ *
+ * @param blob         FDT blob to use
+ * @param node         Node to look at
+ * @param prop_name    Node property name
+ * @param gpio         Array of gpio elements to fill from FDT. This will be
+ *                     untouched if either 0 or an error is returned
+ * @param max_count    Maximum number of elements allowed
+ * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
+ * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
+ */
+int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
+               struct fdt_gpio_state *gpio, int max_count);
+
 /**
  * Set up a GPIO pin according to the provided gpio information. At present this
  * just requests the GPIO.
@@ -369,6 +429,16 @@ int fdtdec_setup_gpio(struct fdt_gpio_state *gpio);
 int fdtdec_get_config_int(const void *blob, const char *prop_name,
                int default_val);
 
+/**
+ * Look in the FDT for a config item with the given name
+ * and return whether it exists.
+ *
+ * @param blob         FDT blob
+ * @param prop_name    property name to look up
+ * @return 1, if it exists, or 0 if not
+ */
+int fdtdec_get_config_bool(const void *blob, const char *prop_name);
+
 /**
  * Look in the FDT for a config item with the given name and return its value
  * as a string.