dm: core: Add flags parameter to device_remove()
This patch adds the flags parameter to device_remove() and changes all
calls to this function to provide the default value of DM_REMOVE_NORMAL
for "normal" device removal.
This is in preparation for the driver specific pre-OS (e.g. DMA
cancelling) remove support.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/include/dm/device.h b/include/dm/device.h
index 4e95fb7..079ec57 100644
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -46,6 +46,32 @@
#define DM_FLAG_OF_PLATDATA (1 << 8)
+/*
+ * Call driver remove function to stop currently active DMA transfers or
+ * give DMA buffers back to the HW / controller. This may be needed for
+ * some drivers to do some final stage cleanup before the OS is called
+ * (U-Boot exit)
+ */
+#define DM_FLAG_ACTIVE_DMA (1 << 9)
+
+/*
+ * One or multiple of these flags are passed to device_remove() so that
+ * a selective device removal as specified by the remove-stage and the
+ * driver flags can be done.
+ */
+enum {
+ /* Normal remove, remove all devices */
+ DM_REMOVE_NORMAL = 1 << 0,
+
+ /* Remove devices with active DMA */
+ DM_REMOVE_ACTIVE_DMA = DM_FLAG_ACTIVE_DMA,
+
+ /* Add more use cases here */
+
+ /* Remove devices with any active flag */
+ DM_REMOVE_ACTIVE_ALL = DM_REMOVE_ACTIVE_DMA,
+};
+
/**
* struct udevice - An instance of a driver
*