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Some UART Controllers (Synopsys DesignWare 8250) will trigger spurious interrupts when the Line Control Register (LCR) is set while the UART is busy. This patch provides the option (16550_WAIT_LCR) to wait for UART until it's not busy, before setting the LCR. (16550_WAIT_LCR is disabled by default) This patch fixes the spurious UART interrupts for the upcoming port of NuttX to StarFive JH7110 SoC (with Synopsys DesignWare 8250 UART). [The patch is explained here](https://lupyuen.github.io/articles/plic#appendix-fix-the-spurious-uart-interrupts) drivers/serial/uart_16550.c: If 16550_WAIT_LCR is enabled, wait until UART is not busy before setting LCR include/nuttx/serial/uart_16550.h: Define the UART Status Register (USR) for checking if UART is busy drivers/serial/Kconfig-16550: Added option 16550_WAIT_LCR to 16550 UART Config, disabled by default |
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| .. | ||
| CMakeLists.txt | ||
| Kconfig | ||
| Kconfig-16550 | ||
| Kconfig-lpuart | ||
| Kconfig-pl011 | ||
| Kconfig-sci | ||
| Kconfig-uart | ||
| Kconfig-usart | ||
| Make.defs | ||
| ptmx.c | ||
| pty.c | ||
| pty.h | ||
| serial.c | ||
| serial_dma.c | ||
| serial_io.c | ||
| serial_pl011.c | ||
| uart_16550.c | ||
| uart_bth4.c | ||
| uart_rpmsg.c | ||