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lib: utils: consider ':' in stdout-path

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The value of the /chosen/stdout-path devicetree property is used to
determine the UART used by openSBI. According to the devicetree
specification the value may contain a hyphen, e.g.

	chosen {
                stdout-path = "/serial@f00:115200";
        };

If the character ':' is present, it terminates the path of the device.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Heinrich Schuchardt
2021-05-28 19:06:32 +02:00
committed by Anup Patel
parent d9ba6536d3
commit 66c4fca532
1 changed files with 12 additions and 3 deletions
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15
lib/utils/serial/fdt_serial.c
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@@ -42,12 +42,21 @@ int fdt_serial_init(void)
int pos, noff = -1, len, coff, rc;
void *fdt = sbi_scratch_thishart_arg1_ptr();
/* Find offset of node pointed by stdout-path */
/* Find offset of node pointed to by stdout-path */
coff = fdt_path_offset(fdt, "/chosen");
if (-1 < coff) {
prop = fdt_getprop(fdt, coff, "stdout-path", &len);
if (prop && len)
noff = fdt_path_offset(fdt, prop);
if (prop && len) {
const char *sep, *start = prop;
/* The device path may be followed by ':' */
sep = strchr(start, ':');
if (sep)
noff = fdt_path_offset_namelen(fdt, prop,
sep - start);
else
noff = fdt_path_offset(fdt, prop);
}
}
/* First check DT node pointed by stdout-path */