From 01c33b813864ca15a9dec22045ce1a5bb09d5e74 Mon Sep 17 00:00:00 2001 From: Manikanta Guntupalli Date: Thu, 16 Nov 2023 19:10:03 +0530 Subject: serial: uartlite: Use dynamic allocation for major number when uart ports > 4 Device number 204 has a range of minors on major number. uart_register_driver is failing due to lack of minor numbers when more number of uart ports used. So, to avoid minor number limitation on 204 major number use dynamic major allocation when more than 4 uart ports used otherwise use static major allocation. https://docs.kernel.org/arch/arm/sa1100/serial_uart.html Signed-off-by: Manikanta Guntupalli Link: https://lore.kernel.org/r/20231116134003.3762725-3-manikanta.guntupalli@amd.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/uartlite.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/tty/serial/uartlite.c') diff --git a/drivers/tty/serial/uartlite.c b/drivers/tty/serial/uartlite.c index f9c69f543a26..10ba41b7be99 100644 --- a/drivers/tty/serial/uartlite.c +++ b/drivers/tty/serial/uartlite.c @@ -24,8 +24,13 @@ #include #define ULITE_NAME "ttyUL" +#if CONFIG_SERIAL_UARTLITE_NR_UARTS > 4 +#define ULITE_MAJOR 0 /* use dynamic node allocation */ +#define ULITE_MINOR 0 +#else #define ULITE_MAJOR 204 #define ULITE_MINOR 187 +#endif #define ULITE_NR_UARTS CONFIG_SERIAL_UARTLITE_NR_UARTS /* --------------------------------------------------------------------- -- cgit v1.2.3