Blackfin: bf54x: add kconfig for UART2/3 DMA channel assignments
The BF54x lacks dedicated DMA channels for the UART peripherals and need
to be muxed between others. So add a kconfig option so people can select
which channels the UARTs will use so they can pick between SPORTs and the
less commonly used EPPI/PIXC peripherals.
Signed-off-by: steven miao <realmz6@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/mach-bf548/include/mach/dma.h b/arch/blackfin/mach-bf548/include/mach/dma.h
index a30d242..1a1091b 100644
--- a/arch/blackfin/mach-bf548/include/mach/dma.h
+++ b/arch/blackfin/mach-bf548/include/mach/dma.h
@@ -27,17 +27,37 @@
#define CH_PIXC_OVERLAY 16
#define CH_PIXC_OUTPUT 17
#define CH_SPORT2_RX 18
-#define CH_UART2_RX 18
#define CH_SPORT2_TX 19
-#define CH_UART2_TX 19
#define CH_SPORT3_RX 20
-#define CH_UART3_RX 20
#define CH_SPORT3_TX 21
-#define CH_UART3_TX 21
#define CH_SDH 22
#define CH_NFC 22
#define CH_SPI2 23
+#if defined(CONFIG_UART2_DMA_RX_ON_DMA13)
+#define CH_UART2_RX 13
+#define IRQ_UART2_RX BFIN_IRQ(37) /* UART2 RX USE EPP1 (DMA13) Interrupt */
+#define CH_UART2_TX 14
+#define IRQ_UART2_TX BFIN_IRQ(38) /* UART2 RX USE EPP1 (DMA14) Interrupt */
+#else /* Default USE SPORT2's DMA Channel */
+#define CH_UART2_RX 18
+#define IRQ_UART2_RX BFIN_IRQ(33) /* UART2 RX (DMA18) Interrupt */
+#define CH_UART2_TX 19
+#define IRQ_UART2_TX BFIN_IRQ(34) /* UART2 TX (DMA19) Interrupt */
+#endif
+
+#if defined(CONFIG_UART3_DMA_RX_ON_DMA15)
+#define CH_UART3_RX 15
+#define IRQ_UART3_RX BFIN_IRQ(64) /* UART3 RX USE PIXC IN0 (DMA15) Interrupt */
+#define CH_UART3_TX 16
+#define IRQ_UART3_TX BFIN_IRQ(65) /* UART3 TX USE PIXC IN1 (DMA16) Interrupt */
+#else /* Default USE SPORT3's DMA Channel */
+#define CH_UART3_RX 20
+#define IRQ_UART3_RX BFIN_IRQ(35) /* UART3 RX (DMA20) Interrupt */
+#define CH_UART3_TX 21
+#define IRQ_UART3_TX BFIN_IRQ(36) /* UART3 TX (DMA21) Interrupt */
+#endif
+
#define CH_MEM_STREAM0_DEST 24
#define CH_MEM_STREAM0_SRC 25
#define CH_MEM_STREAM1_DEST 26