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authorRob Herring <robh@kernel.org>2021-11-18 12:12:10 -0600
committerRob Herring <robh@kernel.org>2021-12-16 16:07:41 -0600
commit60f20d84dc813f1342771a3e4f06d89da26dc412 (patch)
treeba9469491c359c9b36c7fe35289cff156138bc13 /drivers/of
parent9fd4cf5d3571b27d746b8ead494a3f051485b679 (diff)
downloadlinux-60f20d84dc813f1342771a3e4f06d89da26dc412.tar.bz2
of/fdt: Rework early_init_dt_scan_chosen() to call directly
Use of the of_scan_flat_dt() function predates libfdt and is discouraged as libfdt provides a nicer set of APIs. Rework early_init_dt_scan_chosen() to be called directly and use libfdt. Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Frank Rowand <frowand.list@gmail.com> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Frank Rowand <frank.rowand@sony.com> Link: https://lore.kernel.org/r/20211118181213.1433346-2-robh@kernel.org
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/fdt.c39
1 files changed, 19 insertions, 20 deletions
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index bdca35284ceb..1f1705f76263 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -1124,18 +1124,18 @@ int __init early_init_dt_scan_memory(unsigned long node, const char *uname,
return 0;
}
-int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
- int depth, void *data)
+int __init early_init_dt_scan_chosen(char *cmdline)
{
- int l;
+ int l, node;
const char *p;
const void *rng_seed;
+ const void *fdt = initial_boot_params;
- pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
-
- if (depth != 1 || !data ||
- (strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
- return 0;
+ node = fdt_path_offset(fdt, "/chosen");
+ if (node < 0)
+ node = fdt_path_offset(fdt, "/chosen@0");
+ if (node < 0)
+ return -ENOENT;
early_init_dt_check_for_initrd(node);
early_init_dt_check_for_elfcorehdr(node);
@@ -1144,7 +1144,7 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
/* Retrieve command line */
p = of_get_flat_dt_prop(node, "bootargs", &l);
if (p != NULL && l > 0)
- strlcpy(data, p, min(l, COMMAND_LINE_SIZE));
+ strlcpy(cmdline, p, min(l, COMMAND_LINE_SIZE));
/*
* CONFIG_CMDLINE is meant to be a default in case nothing else
@@ -1153,18 +1153,18 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
*/
#ifdef CONFIG_CMDLINE
#if defined(CONFIG_CMDLINE_EXTEND)
- strlcat(data, " ", COMMAND_LINE_SIZE);
- strlcat(data, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+ strlcat(cmdline, " ", COMMAND_LINE_SIZE);
+ strlcat(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
#elif defined(CONFIG_CMDLINE_FORCE)
- strlcpy(data, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+ strlcpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
#else
/* No arguments from boot loader, use kernel's cmdl*/
- if (!((char *)data)[0])
- strlcpy(data, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+ if (!((char *)cmdline)[0])
+ strlcpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
#endif
#endif /* CONFIG_CMDLINE */
- pr_debug("Command line is: %s\n", (char *)data);
+ pr_debug("Command line is: %s\n", (char *)cmdline);
rng_seed = of_get_flat_dt_prop(node, "rng-seed", &l);
if (rng_seed && l > 0) {
@@ -1178,8 +1178,7 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
fdt_totalsize(initial_boot_params));
}
- /* break now */
- return 1;
+ return 0;
}
#ifndef MIN_MEMBLOCK_ADDR
@@ -1261,14 +1260,14 @@ bool __init early_init_dt_verify(void *params)
void __init early_init_dt_scan_nodes(void)
{
- int rc = 0;
+ int rc;
/* Initialize {size,address}-cells info */
of_scan_flat_dt(early_init_dt_scan_root, NULL);
/* Retrieve various information from the /chosen node */
- rc = of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
- if (!rc)
+ rc = early_init_dt_scan_chosen(boot_command_line);
+ if (rc)
pr_warn("No chosen node found, continuing without\n");
/* Setup memory, calling early_init_dt_add_memory_arch */