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,
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 v4 2/5] build configuration for AST2500 DMA UART driver
Date: Fri, 26 Jul 2019 18:57:17 +0530 [thread overview]
Message-ID: <1564147640-30753-3-git-send-email-open.sudheer@gmail.com> (raw)
In-Reply-To: <1564147640-30753-1-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 from v3->v4:
- config name changed to SERIAL_AST_DMA_UART
- new config AST_UART_DMA_RX_INTERRUPT introduced
for selectin between DMA interrupt based RX vs timer based uart RX
Changes in v2->v3:
- change logs added
drivers/tty/serial/8250/Kconfig | 43 ++++++++++++++++++++++++++++++++
drivers/tty/serial/8250/Makefile | 1 +
2 files changed, 44 insertions(+)
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index 15c2c5463835..7052ab0f4894 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -189,6 +189,49 @@ config SERIAL_8250_RUNTIME_UARTS
with the module parameter "nr_uarts", or boot-time parameter
8250.nr_uarts
+config SERIAL_AST_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. 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_UART_DMA_RX_INTERRUPT
+ bool "DMA interrupt of UART RX"
+ depends on SERIAL_AST_DMA_UART
+ default y
+ help
+ This config is Enabled by default,which means Rx part
+ of UART is handled by DMA interrupt.
+ if the version of chip AST2500 doesn't support
+ DMA interrupt based RX,then Disable this option.Refer
+ driver code to see how Rx is handled by timer,if Rx
+ interrupt is not available.
+
+
+config AST_NR_DMA_UARTS
+ int "Maximum number of uart dma serial ports"
+ depends on SERIAL_AST_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 SERIAL_AST_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.
+
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..251f2e85efa1 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-$(CONFIG_SERIAL_AST_DMA_UART) += 8250_ast2500_uart_dma.o
obj-$(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:[~2019-07-26 13:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-26 13:27 [patch v4 0/5] *** AST2500 DMA UART driver *** sudheer.v
2019-07-26 13:27 ` [patch v4 1/5] AST2500 DMA UART driver sudheer.v
2019-07-30 15:47 ` Greg KH
[not found] ` <CAE-5=DQ8p9WAhjrmZ8ye8GjoHrcxkHkjJPRNRFtvgeF5SdqwVQ@mail.gmail.com>
2019-07-31 11:42 ` Greg KH
2019-07-26 13:27 ` sudheer.v [this message]
2019-07-26 13:27 ` [patch v4 3/5] DT nodes for " sudheer.v
2019-08-01 19:28 ` Rob Herring
2019-07-26 13:27 ` [patch v4 4/5] defconfig and MAINTAINERS updated " sudheer.v
2019-07-26 13:27 ` [patch v4 5/5] Documentation: DT bindings " sudheer.v
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