On Tue, Jun 25, 2019 at 04:14:33PM +0530, sudheer.v wrote: > 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. Why did you change this line? > @@ -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 That boot paramter is not correct, right? Are you sure these all work like you think they work? thanks, greg k-h
