| menuconfig UART_NS16550 |
| bool "NS16550 serial driver" |
| select SERIAL_HAS_DRIVER |
| select SERIAL_SUPPORT_INTERRUPT |
| help |
| This option enables the NS16550 serial driver. |
| This driver can be used for the serial hardware |
| available on x86 boards. |
| |
| config UART_NS16550_PCI |
| bool "Enable PCI Support" |
| depends on PCI && UART_NS16550 |
| help |
| This enables NS16550 to probe for PCI-based serial devices. |
| |
| This option enables the driver to auto-detect the device |
| configuration required to access those ports. |
| |
| config UART_NS16550_DLF |
| bool "Enable Divisor Latch Fraction (DLF) support" |
| depends on UART_NS16550 |
| help |
| This enables support for divisor latch fraction (DLF). |
| It is used to limit frequency error. |
| |
| Says n if you are not sure if hardware supports this. |
| |
| config UART_NS16550_PCP |
| bool "Enable Apollo Lake PRV_CLOCK_PARAMS (PCP) support" |
| depends on SOC_APOLLO_LAKE && UART_NS16550 |
| help |
| This enables configuration of the clock blocks that feed |
| the UARTs on Apollo Lake SoCs, allowing the generation of |
| custom baud rates. |
| |
| Say n unless you know you need this feature. |
| |
| config UART_NS16550_LINE_CTRL |
| bool "Enable Serial Line Control for Apps" |
| depends on UART_LINE_CTRL && UART_NS16550 |
| help |
| This enables the API for apps to control the serial line, |
| such as CTS and RTS. |
| |
| Says n if not sure. |
| |
| config UART_NS16550_DRV_CMD |
| bool "Enable Driver Commands" |
| depends on UART_DRV_CMD && UART_NS16550 |
| help |
| This enables the API for apps to send commands to driver. |
| |
| Says n if not sure. |
| |
| config UART_NS16750 |
| bool "Enable 64-bytes FIFO for UART 16750" |
| depends on UART_NS16550 |
| help |
| This enables support for 64-bytes FIFO if UART controller is 16750. |
| |
| # ---------- Port 0 ---------- |
| |
| menuconfig UART_NS16550_PORT_0 |
| bool "Enable NS16550 Port 0" |
| 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_0_OPTIONS |
| int "Port 0 Options" |
| default 0 |
| depends on UART_NS16550_PORT_0 |
| help |
| Options used for port initialization. |
| |
| config UART_NS16550_PORT_0_DLF |
| hex "Port 0 DLF value" |
| default 0x0 |
| depends on UART_NS16550_PORT_0 && UART_NS16550_DLF |
| help |
| Value for DLF register. |
| |
| config UART_NS16550_PORT_0_PCP |
| hex "Port 0 PCP value" |
| default 0 |
| depends on UART_NS16550_PORT_0 && UART_NS16550_PCP |
| help |
| Value for PRV_CLOCK_PARAMS register. If left at its default |
| value (0), then the kernel will not attempt to set the PCP |
| for this UART; otherwise be sure the device tree for this |
| port has sys_clk_freq set accordingly. |
| |
| config UART_NS16550_PORT_0_PCI |
| bool "Port 0 is PCI-based" |
| depends on UART_NS16550_PCI && UART_NS16550_PORT_0 |
| help |
| Obtain port information from PCI. |
| |
| # ---------- Port 1 ---------- |
| |
| menuconfig UART_NS16550_PORT_1 |
| bool "Enable NS16550 Port 1" |
| 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_1_OPTIONS |
| int "Port 1 Options" |
| default 0 |
| depends on UART_NS16550_PORT_1 |
| help |
| Options used for port initialization. |
| |
| config UART_NS16550_PORT_1_DLF |
| hex "Port 1 DLF value" |
| default 0x0 |
| depends on UART_NS16550_PORT_1 && UART_NS16550_DLF |
| help |
| Value for DLF register. |
| |
| config UART_NS16550_PORT_1_PCP |
| hex "Port 1 PCP value" |
| default 0 |
| depends on UART_NS16550_PORT_1 && UART_NS16550_PCP |
| help |
| Value for PRV_CLOCK_PARAMS register. If left at its default |
| value (0), then the kernel will not attempt to set the PCP |
| for this UART; otherwise be sure the device tree for this |
| port has sys_clk_freq set accordingly. |
| |
| config UART_NS16550_PORT_1_PCI |
| bool "Port 1 is PCI-based" |
| depends on UART_NS16550_PCI && UART_NS16550_PORT_1 |
| help |
| Obtain port information from PCI. |
| |
| # ---------- Port 2 ---------- |
| |
| menuconfig UART_NS16550_PORT_2 |
| bool "Enable NS16550 Port 2" |
| 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. |
| |
| config UART_NS16550_PORT_2_PCP |
| hex "Port 2 PCP value" |
| default 0 |
| depends on UART_NS16550_PORT_2 && UART_NS16550_PCP |
| help |
| Value for PRV_CLOCK_PARAMS register. If left at its default |
| value (0), then the kernel will not attempt to set the PCP |
| for this UART; otherwise be sure the device tree for this |
| port has sys_clk_freq set accordingly. |
| |
| config UART_NS16550_PORT_2_PCI |
| bool "Port 2 is PCI-based" |
| depends on UART_NS16550_PCI && UART_NS16550_PORT_2 |
| help |
| Obtain port information from PCI. |
| |
| # ---------- Port 3 ---------- |
| |
| menuconfig UART_NS16550_PORT_3 |
| bool "Enable NS16550 Port 3" |
| 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_3_OPTIONS |
| int "Port 3 Options" |
| default 0 |
| depends on UART_NS16550_PORT_3 |
| help |
| Options used for port initialization. |
| |
| config UART_NS16550_PORT_3_DLF |
| hex "Port 3 DLF value" |
| default 0x0 |
| depends on UART_NS16550_PORT_3 && UART_NS16550_DLF |
| help |
| Value for DLF register. |
| |
| config UART_NS16550_PORT_3_PCP |
| hex "Port 3 PCP value" |
| default 0 |
| depends on UART_NS16550_PORT_3 && UART_NS16550_PCP |
| help |
| Value for PRV_CLOCK_PARAMS register. If left at its default |
| value (0), then the kernel will not attempt to set the PCP |
| for this UART; otherwise be sure the device tree for this |
| port has sys_clk_freq set accordingly. |
| |
| config UART_NS16550_PORT_3_PCI |
| bool "Port 3 is PCI-based" |
| depends on UART_NS16550_PCI && UART_NS16550_PORT_3 |
| help |
| Obtain port information from PCI. |
