[MIPS] Alchemy: dbdma: add API to delete custom DDMA device ids.

Add API to delete custom DDMA device ids create with
au1xxx_ddma_device_add().

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 12 insertions, 0 deletions

diff --git a/arch/mips/au1000/common/dbdma.c b/arch/mips/au1000/common/dbdma.c
index 42d555236de1..601ee9180ee4 100644
--- a/arch/mips/au1000/common/dbdma.c
+++ b/arch/mips/au1000/common/dbdma.c
@@ -216,6 +216,17 @@ u32 au1xxx_ddma_add_device(dbdev_tab_t *dev)
 }
 EXPORT_SYMBOL(au1xxx_ddma_add_device);
 
+void au1xxx_ddma_del_device(u32 devid)
+{
+        dbdev_tab_t *p = find_dbdev_id(devid);
+
+        if (p != NULL) {
+                memset(p, 0, sizeof(dbdev_tab_t));
+                p->dev_id = ~0;
+        }
+}
+EXPORT_SYMBOL(au1xxx_ddma_del_device);
+
 /* Allocate a channel and return a non-zero descriptor if successful. */
 u32 au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
        void (*callback)(int, void *), void *callparam)
diff --git a/include/asm-mips/mach-au1x00/au1xxx_dbdma.h b/include/asm-mips/mach-au1x00/au1xxx_dbdma.h
index ad17d7ce516a..44a67bf05dc1 100644
--- a/include/asm-mips/mach-au1x00/au1xxx_dbdma.h
+++ b/include/asm-mips/mach-au1x00/au1xxx_dbdma.h
@@ -355,6 +355,7 @@ void au1xxx_dbdma_dump(u32 chanid);
 u32 au1xxx_dbdma_put_dscr(u32 chanid, au1x_ddma_desc_t *dscr);
 
 u32 au1xxx_ddma_add_device(dbdev_tab_t *dev);
+extern void au1xxx_ddma_del_device(u32 devid);
 void *au1xxx_ddma_get_nextptr_virt(au1x_ddma_desc_t *dp);
 
 /*