Resguardo inicial

linux-7.2.3/drivers/dma/loongson/Kconfig

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+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Loongson DMA controllers drivers
+#
+if MACH_LOONGSON32 || MACH_LOONGSON64 || COMPILE_TEST
+
+config LOONGSON1_APB_DMA
+	tristate "Loongson1 APB DMA support"
+	depends on MACH_LOONGSON32 || COMPILE_TEST
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+	help
+	  This selects support for the APB DMA controller in Loongson1 SoCs,
+	  which is required by Loongson1 NAND and audio support.
+
+config LOONGSON2_APB_DMA
+	tristate "Loongson2 APB DMA support"
+	depends on MACH_LOONGSON64 || COMPILE_TEST
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+	help
+	  Support for the Loongson2 APB DMA controller driver. The
+	  DMA controller is having single DMA channel which can be
+	  configured for different peripherals like audio, nand, sdio
+	  etc which is in APB bus.
+
+	  This DMA controller transfers data from memory to peripheral fifo.
+	  It does not support memory to memory data transfer.
+
+config LOONGSON2_APB_CMC_DMA
+	tristate "Loongson2 Chain Multi-Channel DMA support"
+	depends on MACH_LOONGSON64 || COMPILE_TEST
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+	help
+	  Support for the Loongson Chain Multi-Channel DMA controller driver.
+	  It is discovered on the Loongson-2K chip (Loongson-2K0300/Loongson-2K3000),
+	  which has 4/8 channels internally, enabling bidirectional data transfer
+	  between devices and memory.
+
+endif