dmaengine: dw: apply both HS interfaces and remove slave_id usage

Instead of one request line member let's use both source and destination ones.
Usually we have no such hardware except Atmel MMC controller found on AVR32
platform (see arch/avr32/mach-at32ap/at32ap700x.c and
drivers/mmc/host/atmel-mci.c).

This patch removes slave_id usage since it'll be removed from the generic
structure in later. This breaks the non-ACPI / non-DT cases for the users of
the driver, i.e. SPI and HSUART. However, these cases mean only PCI enumerated
devices for now, which is anyway broken (considering more than one DMA
controller in the system) and this patch series is intended to fix that
eventually.

The ACPI and DT cases shall be aware of the channel direction when setting
request lines, but this is a minor problem that would be addressed in future.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/dma/dw/regs.h b/drivers/dma/dw/regs.h
index af02439155e9..0e82d9972c17 100644
--- a/drivers/dma/dw/regs.h
+++ b/drivers/dma/dw/regs.h
@@ -221,9 +221,10 @@ struct dw_dma_chan {
         bool                    nollp;
 
         /* custom slave configuration */
-        unsigned int            request_line;
-        unsigned char           src_master;
-        unsigned char           dst_master;
+        u8                      src_id;
+        u8                      dst_id;
+        u8                      src_master;
+        u8                      dst_master;
 
         /* configuration passed via DMA_SLAVE_CONFIG */
         struct dma_slave_config dma_sconfig;