From: sudheer veliseti <sudheer.open@xxxxxxxxx> build config for DMA based UART driver in AST2500. Total Available UARTs in AST2500 are 4 Signed-off-by: sudheer veliseti <sudheer.open@xxxxxxxxx> --- Changes in v3: - change logs added drivers/tty/serial/8250/Kconfig | 35 +++++++++++++++++++++++++++++++- drivers/tty/serial/8250/Makefile | 1 + 2 files changed, 35 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index 15c2c5463835..c793466a1c47 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -45,7 +45,7 @@ config SERIAL_8250_DEPRECATED_OPTIONS keep the 8250_core.* options around until they revert the changes they already did. - If 8250 is built as a module, this adds 8250_core alias instead. + If 8250 is built as a module, this adds 8250_core alias instead. If you did not notice yet and/or you have userspace from pre-3.7, it is safe (and recommended) to say N here. @@ -189,6 +189,39 @@ config SERIAL_8250_RUNTIME_UARTS with the module parameter "nr_uarts", or boot-time parameter 8250.nr_uarts +config AST_SERIAL_DMA_UART + tristate "AST UART driver with DMA" + select SERIAL_CORE + help + UART driver with DMA support for Aspeed BMC AST25XX. + this driver supports UARTs in AST2500,AST2600. It uses + DMA channel of DMA engines present in these chips. + since this dma engine is used only by UARTs it is not + added as a separate DMA driver instead added as a layer + within UART driver. + + +config AST_NR_DMA_UARTS + int "Maximum number of uart dma serial ports" + depends on AST_SERIAL_DMA_UART + default "4" + help + Set this to the number of serial ports you want the driver + to support. This includes any ports discovered via ACPI or + PCI enumeration and any ports that may be added at run-time + via hot-plug, or any ISA multi-port serial cards. + +config AST_RUNTIME_DMA_UARTS + int "Number of uart dma serial ports to register at runtime" + depends on AST_SERIAL_DMA_UART + range 0 AST_NR_DMA_UARTS + default "4" + help + Set this to the maximum number of serial ports you want + the kernel to register at boot time. This can be overridden + with the module parameter "nr_uarts", or boot-time parameter + 8250.nr_uarts + config SERIAL_8250_EXTENDED bool "Extended 8250/16550 serial driver options" depends on SERIAL_8250 diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile index 18751bc63a84..54d40e5c6e2a 100644 --- a/drivers/tty/serial/8250/Makefile +++ b/drivers/tty/serial/8250/Makefile @@ -36,6 +36,7 @@ obj-$(CONFIG_SERIAL_8250_LPSS) += 8250_lpss.o obj-$(CONFIG_SERIAL_8250_MID) += 8250_mid.o obj-$(CONFIG_SERIAL_8250_MOXA) += 8250_moxa.o obj-$(CONFIG_SERIAL_8250_PXA) += 8250_pxa.o +obj-$(CONFIG_AST_SERIAL_DMA_UART) += 8250_ast2500_uart_dma.o obj-$(CONFIG_SERIAL_OF_PLATFORM) += 8250_of.o CFLAGS_8250_ingenic.o += -I$(srctree)/scripts/dtc/libfdt -- 2.17.1
