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The Linux kernel configuration item CONFIG_SERIAL_8250_BCM2835AUX
:
( CONFIG_ARCH_BCM2835 || CONFIG_COMPILE_TEST ) && ( CONFIG_SERIAL_8250 && CONFIG_SERIAL_8250_SHARE_IRQ )
8250_bcm2835aux
Support for the BCM2835 auxiliar mini UART.
Features and limitations of the UART are Registers are similar to 16650 registers, set bits in the control registers that are unsupported are ignored and read back as 0 7/8 bit operation with 1 start and 1 stop bit 8 symbols deep fifo for rx and tx SW controlled RTS and SW readable CTS Clock rate derived from system clock Uses 8 times oversampling (compared to 16 times for 16650) Missing break detection (but break generation) Missing framing error detection Missing parity bit Missing receive time-out interrupt Missing DCD, DSR, DTR and RI signals
If unsure, say N.
Raw data from LKDDb:
lkddb acpi "BCM2836" : CONFIG_SERIAL_8250 CONFIG_SERIAL_8250_BCM2835AUX : drivers/tty/serial/8250/8250_bcm2835aux.c # in 5.18–5.19, 6.0–6.4
lkddb acpi "BCM2836" : CONFIG_SERIAL_8250_BCM2835AUX : drivers/tty/serial/8250/8250_bcm2835aux.c # in 6.5–6.12, 6.13-rc+HEAD
lkddb module 8250_bcm2835aux CONFIG_SERIAL_8250_BCM2835AUX : drivers/tty/serial/8250/Kconfig : "BCM2835 auxiliar mini UART support" # in 4.6–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD
lkddb of "" "" "brcm,bcm2835-aux-uart" : CONFIG_SERIAL_8250 CONFIG_SERIAL_8250_BCM2835AUX : drivers/tty/serial/8250/8250_bcm2835aux.c # in 4.6–4.20, 5.0–5.19, 6.0–6.4
lkddb of "" "" "brcm,bcm2835-aux-uart" : CONFIG_SERIAL_8250_BCM2835AUX : drivers/tty/serial/8250/8250_bcm2835aux.c # in 6.5–6.12, 6.13-rc+HEAD
lkddb platform "bcm2835-aux-uart" : CONFIG_SERIAL_8250 CONFIG_SERIAL_8250_BCM2835AUX : drivers/tty/serial/8250/8250_bcm2835aux.c # in 4.6–4.20, 5.0–5.19, 6.0–6.4
lkddb platform "bcm2835-aux-uart" : CONFIG_SERIAL_8250_BCM2835AUX : drivers/tty/serial/8250/8250_bcm2835aux.c # in 6.5–6.12, 6.13-rc+HEAD
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Automatically generated (in year 2024). See also LKDDb sources on GitLab