dmaengine: dw_dmac: move to generic DMA binding
The original device tree binding for this driver, from Viresh Kumar
unfortunately conflicted with the generic DMA binding, and did not allow
to completely seperate slave device configuration from the controller.
This is an attempt to replace it with an implementation of the generic
binding, but it is currently completely untested, because I do not have
any hardware with this particular controller.
The patch applies on top of the slave-dma tree, which contains both the base
support for the generic DMA binding, as well as the earlier attempt from
Viresh. Both of these are currently not merged upstream however.
This version incorporates feedback from Viresh Kumar, Andy Shevchenko
and Russell King.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Vinod Koul <vinod.koul@linux.intel.com>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/dw_dmac_regs.h b/drivers/dma/dw_dmac_regs.h
index 88dd8eb..cf0ce5c 100644
--- a/drivers/dma/dw_dmac_regs.h
+++ b/drivers/dma/dw_dmac_regs.h
@@ -13,6 +13,7 @@
#include <linux/dw_dmac.h>
#define DW_DMA_MAX_NR_CHANNELS 8
+#define DW_DMA_MAX_NR_REQUESTS 16
/* flow controller */
enum dw_dma_fc {
@@ -211,6 +212,8 @@
/* hardware configuration */
unsigned int block_size;
bool nollp;
+ unsigned int request_line;
+ struct dw_dma_slave slave;
/* configuration passed via DMA_SLAVE_CONFIG */
struct dma_slave_config dma_sconfig;
@@ -239,10 +242,6 @@
struct tasklet_struct tasklet;
struct clk *clk;
- /* slave information */
- struct dw_dma_slave *sd;
- unsigned int sd_count;
-
u8 all_chan_mask;
/* hardware configuration */