patrick/zephyr
1
0
Fork 0
Code Issues Pull requests Actions 7 Packages Projects Releases Wiki Activity

drivers/serial: Add port 2 instance in ns16550 driver

Browse source 
Looks lik ARC arch snps_esmk can provide a 3rd port of this controller,
so let's add the necessary bits and pieces to get it instanciated if one
enable this port in DTS.

PCI settings are not introduced for that port as there is no known
arch/board exposing a 3rd port on PCI bus.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
This commit is contained in:
Tomasz Bursztyka 2018-05-17 17:46:52 +02:00 committed by Anas Nashif
parent 60d509f3d7
commit 00bbbae41d
2 changed files with 69 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
drivers/serial/Kconfig.ns16550
View file

@ -164,3 +164,28 @@ config UART_NS16550_PORT_1_DLF
depends on UART_NS16550_PORT_1 && UART_NS16550_DLF
help
Value for DLF register.
# ---------- Port 2 ----------
menuconfig UART_NS16550_PORT_2
bool "Enable NS16550 Port 2"
default n
depends on UART_NS16550
help
This tells the driver to configure the UART port at boot, depending on
the additional configure options below.
config UART_NS16550_PORT_2_OPTIONS
int "Port 2 Options"
default 0
depends on UART_NS16550_PORT_2
help
Options used for port initialization.
config UART_NS16550_PORT_2_DLF
hex "Port 2 DLF value"
default 0x0
depends on UART_NS16550_PORT_2 && UART_NS16550_DLF
help
Value for DLF register.

44
drivers/serial/uart_ns16550.c
View file

@ -850,3 +850,47 @@ static void irq_config_func_1(struct device *dev)
#endif
#endif /* CONFIG_UART_NS16550_PORT_1 */
#ifdef CONFIG_UART_NS16550_PORT_2
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
static void irq_config_func_2(struct device *port);
#endif
static const struct uart_ns16550_device_config uart_ns16550_dev_cfg_2 = {
.sys_clk_freq = CONFIG_UART_NS16550_PORT_2_CLK_FREQ,
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
.irq_config_func = irq_config_func_2,
#endif
};
static struct uart_ns16550_dev_data_t uart_ns16550_dev_data_2 = {
.port = CONFIG_UART_NS16550_PORT_2_BASE_ADDR,
.baud_rate = CONFIG_UART_NS16550_PORT_2_BAUD_RATE,
.options = CONFIG_UART_NS16550_PORT_2_OPTIONS,
#ifdef CONFIG_UART_NS16550_PORT_2_DLF
.dlf = CONFIG_UART_NS16550_PORT_2_DLF,
#endif
};
DEVICE_AND_API_INIT(uart_ns16550_2, CONFIG_UART_NS16550_PORT_2_NAME, &uart_ns16550_init,
&uart_ns16550_dev_data_2, &uart_ns16550_dev_cfg_2,
PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&uart_ns16550_driver_api);
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
static void irq_config_func_2(struct device *dev)
{
ARG_UNUSED(dev);
IRQ_CONNECT(CONFIG_UART_NS16550_PORT_2_IRQ,
CONFIG_UART_NS16550_PORT_2_IRQ_PRI,
uart_ns16550_isr, DEVICE_GET(uart_ns16550_2),
CONFIG_UART_NS16550_PORT_2_IRQ_FLAGS);
irq_enable(CONFIG_UART_NS16550_PORT_2_IRQ);
}
#endif
#endif /* CONFIG_UART_NS16550_PORT_2 */