From: "sudheer.v" <open.sudheer@gmail.com>
To: gregkh@linuxfoundation.org, jslaby@suse.com, joel@jms.id.au,
andrew@aj.id.au, benh@kernel.crashing.org, robh+dt@kernel.org,
mark.rutland@arm.com,
shivahshankar.shankarnarayanrao@aspeedtech.com,
shivahshankar@gmail.com, sudheer.veliseti@aspeedtech.com
Cc: sudheer veliseti <sudheer.open@gmail.com>,
linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
devicetree@vger.kernel.org, linux-aspeed@lists.ozlabs.org
Subject: [patch v3 2/5] build configuration for AST2500 DMA UART driver
Date: Tue, 25 Jun 2019 16:14:33 +0530 [thread overview]
Message-ID: <1561459476-14268-3-git-send-email-open.sudheer@gmail.com> (raw)
In-Reply-To: <1561459476-14268-1-git-send-email-open.sudheer@gmail.com>
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.
@@ -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
next prev parent reply other threads:[~2019-06-25 10:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-25 10:44 [patch v3 0/5] *** DMA based UART driver for AST2500 *** sudheer.v
2019-06-25 10:44 ` [patch v3 1/5] AST2500 DMA UART driver sudheer.v
2019-07-03 17:49 ` Greg KH
2019-07-03 19:16 ` Joe Perches
2019-07-03 23:04 ` Benjamin Herrenschmidt
2019-06-25 10:44 ` sudheer.v [this message]
2019-07-03 17:50 ` [patch v3 2/5] build configuration for " Greg KH
2019-06-25 10:44 ` [patch v3 3/5] DT nodes " sudheer.v
2019-07-03 17:50 ` Greg KH
2019-06-25 10:44 ` [patch v3 4/5] defconfig and MAINTAINERS updated " sudheer.v
2019-07-03 17:51 ` Greg KH
2019-06-25 10:44 ` [patch v3 5/5] Documentation: DT bindings " sudheer.v
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