diff --git a/sys/dev/uart/uart_cpu_fdt.c b/sys/dev/uart/uart_cpu_fdt.c index 0fee5e5e326..57ad6ec6377 100644 --- a/sys/dev/uart/uart_cpu_fdt.c +++ b/sys/dev/uart/uart_cpu_fdt.c @@ -34,6 +34,7 @@ __FBSDID("$FreeBSD$"); #include #include #include +#include #include #include @@ -98,10 +99,25 @@ uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0); } +static int +phandle_chosen_propdev(phandle_t chosen, const char *name, phandle_t *node) +{ + char buf[64]; + + if (OF_getprop(chosen, name, buf, sizeof(buf)) <= 0) + return (ENXIO); + if ((*node = OF_finddevice(buf)) == -1) + return (ENXIO); + + return (0); +} + int uart_cpu_getdev(int devtype, struct uart_devinfo *di) { - char buf[64]; + const char *propnames[] = {"stdout-path", "linux,stdout-path", "stdout", + "stdin-path", "stdin", NULL}; + const char **name; struct uart_class *class; phandle_t node, chosen; pcell_t shift, br, rclk; @@ -111,7 +127,7 @@ uart_cpu_getdev(int devtype, struct uart_devinfo *di) uart_bus_space_mem = fdtbus_bs_tag; uart_bus_space_io = NULL; - /* Allow overriding the FDT uning the environment. */ + /* Allow overriding the FDT using the environment. */ class = &uart_ns8250_class; err = uart_getenv(devtype, di, class); if (!err) @@ -125,14 +141,11 @@ uart_cpu_getdev(int devtype, struct uart_devinfo *di) */ if ((chosen = OF_finddevice("/chosen")) == -1) return (ENXIO); - if (OF_getprop(chosen, "stdin", buf, sizeof(buf)) <= 0) - return (ENXIO); - if ((node = OF_finddevice(buf)) == -1) - return (ENXIO); - if (OF_getprop(chosen, "stdout", buf, sizeof(buf)) <= 0) - return (ENXIO); - if (OF_finddevice(buf) != node) - /* Only stdin == stdout is supported. */ + for (name = propnames; *name != NULL; name++) { + if (phandle_chosen_propdev(chosen, *name, &node) == 0) + break; + } + if (*name == NULL) return (ENXIO); /* * Retrieve serial attributes.