[v3,2/5] build configuration for AST2500 DMA UART driver
diff mbox series

Message ID 1561459476-14268-3-git-send-email-open.sudheer@gmail.com
State Not Applicable, archived
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Series
  • *** DMA based UART driver for AST2500 ***
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Commit Message

sudheer v June 25, 2019, 10:44 a.m. UTC
From: sudheer veliseti <sudheer.open@gmail.com>

build config for DMA based UART driver in AST2500.
Total Available  UARTs in AST2500 are 4

Signed-off-by: sudheer veliseti <sudheer.open@gmail.com>
---

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(-)

Comments

Greg KH July 3, 2019, 5:50 p.m. UTC | #1
On Tue, Jun 25, 2019 at 04:14:33PM +0530, sudheer.v wrote:
> From: sudheer veliseti <sudheer.open@gmail.com>
> 
> build config for DMA based UART driver in AST2500.
> Total Available  UARTs in AST2500 are 4
> 
> Signed-off-by: sudheer veliseti <sudheer.open@gmail.com>
> ---
> 
> 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

Patch
diff mbox series

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