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-rw-r--r--include/dm/device.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/dm/device.h b/include/dm/device.h
index 13598a1..096d84b 100644
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -26,6 +26,9 @@ struct driver_info;
/* DM should init this device prior to relocation */
#define DM_FLAG_PRE_RELOC (1 << 2)
+/* DM is responsible for allocating and freeing parent_platdata */
+#define DM_FLAG_ALLOC_PARENT_PDATA (1 << 3)
+
/**
* struct udevice - An instance of a driver
*
@@ -46,6 +49,7 @@ struct driver_info;
* @driver: The driver used by this device
* @name: Name of device, typically the FDT node name
* @platdata: Configuration data for this device
+ * @parent_platdata: The parent bus's configuration data for this device
* @of_offset: Device tree node offset for this device (- for none)
* @of_id: Pointer to the udevice_id structure which created the device
* @parent: Parent of this device, or NULL for the top level device
@@ -65,6 +69,7 @@ struct udevice {
struct driver *driver;
const char *name;
void *platdata;
+ void *parent_platdata;
int of_offset;
const struct udevice_id *of_id;
struct udevice *parent;
@@ -146,6 +151,9 @@ struct udevice_id {
* device_probe_child() pass it in. So far the use case for allocating it
* is SPI, but I found that unsatisfactory. Since it is here I will leave it
* until things are clearer.
+ * @per_child_platdata_auto_alloc_size: A bus likes to store information about
+ * its children. If non-zero this is the size of this data, to be allocated
+ * in the child's parent_platdata pointer.
* @ops: Driver-specific operations. This is typically a list of function
* pointers defined by the driver, to implement driver functions required by
* the uclass.
@@ -165,6 +173,7 @@ struct driver {
int priv_auto_alloc_size;
int platdata_auto_alloc_size;
int per_child_auto_alloc_size;
+ int per_child_platdata_auto_alloc_size;
const void *ops; /* driver-specific operations */
uint32_t flags;
};
@@ -184,6 +193,16 @@ struct driver {
void *dev_get_platdata(struct udevice *dev);
/**
+ * dev_get_parent_platdata() - Get the parent platform data for a device
+ *
+ * This checks that dev is not NULL, but no other checks for now
+ *
+ * @dev Device to check
+ * @return parent's platform data, or NULL if none
+ */
+void *dev_get_parent_platdata(struct udevice *dev);
+
+/**
* dev_get_parentdata() - Get the parent data for a device
*
* The parent data is data stored in the device but owned by the parent.