[RFC PATCH] DMA: PL330: Update PL330 DMAC to support runtime PM

diff --git a/include/linux/amba/pl330.h b/include/linux/amba/pl330.h
index 17b0ada..d9a63fd 100644
--- a/include/linux/amba/pl330.h
+++ b/include/linux/amba/pl330.h

@@ -12,6 +12,9 @@

?#ifndef ? ? ? ?__AMBA_PL330_H_
?#define ? ? ? ?__AMBA_PL330_H_

+#include <linux/dmaengine.h>
+#include <linux/interrupt.h>
+
?#include <asm/hardware/pl330.h>

?struct dma_pl330_peri {

@@ -42,4 +45,55 @@ struct dma_pl330_platdata {

? ? ? ?unsigned mcbuf_sz;
?};

+struct dma_pl330_chan {
+ ? ? ? /* Schedule desc completion */
+ ? ? ? struct tasklet_struct task;
+
+ ? ? ? /* DMA-Engine Channel */
+ ? ? ? struct dma_chan chan;
+
+ ? ? ? /* Last completed cookie */
+ ? ? ? dma_cookie_t completed;
+
+ ? ? ? /* List of to be xfered descriptors */
+ ? ? ? struct list_head work_list;
+
+ ? ? ? /* Pointer to the DMAC that manages this channel,
+ ? ? ? ?* NULL if the channel is available to be acquired.
+ ? ? ? ?* As the parent, this DMAC also provides descriptors
+ ? ? ? ?* to the channel.
+ ? ? ? ?*/
+ ? ? ? struct dma_pl330_dmac *dmac;
+
+ ? ? ? /* To protect channel manipulation */
+ ? ? ? spinlock_t lock;
+
+ ? ? ? /* Token of a hardware channel thread of PL330 DMAC
+ ? ? ? ?* NULL if the channel is available to be acquired.
+ ? ? ? ?*/
+ ? ? ? void *pl330_chid;
+
+ ? ? ? /* taks for cyclic capability */
+ ? ? ? struct tasklet_struct *cyclic_task;
+
+ ? ? ? bool cyclic;
+};
+
+struct dma_pl330_dmac {
+ ? ? ? struct pl330_info pif;
+
+ ? ? ? /* DMA-Engine Device */
+ ? ? ? struct dma_device ddma;
+
+ ? ? ? /* Pool of descriptors available for the DMAC's channels */
+ ? ? ? struct list_head desc_pool;
+ ? ? ? /* To protect desc_pool manipulation */
+ ? ? ? spinlock_t pool_lock;
+
+ ? ? ? /* Peripheral channels connected to this DMAC */
+ ? ? ? struct dma_pl330_chan peripherals[0]; /* keep at end */
+
+ ? ? ? struct clk *clk;
+};
+
?#endif /* __AMBA_PL330_H_ */