* Copyright (c) 2012 The Chromium OS Authors.
* (C) Copyright 2004 DENX Software Engineering, Wolfgang Denk, wd@denx.de
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
return map;
}
-int key_matrix_decode_fdt(struct key_matrix *config, const void *blob,
- int node)
+int key_matrix_decode_fdt(struct key_matrix *config, const void *blob, int node)
{
const struct fdt_property *prop;
- static const char prefix[] = "linux,";
- int plen = sizeof(prefix) - 1;
- int offset;
-
- /* Check each property name for ones that we understand */
- for (offset = fdt_first_property_offset(blob, node);
- offset > 0;
- offset = fdt_next_property_offset(blob, offset)) {
- const char *name;
- int len;
-
- prop = fdt_get_property_by_offset(blob, offset, NULL);
- name = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
- len = strlen(name);
-
- /* Name needs to match "1,<type>keymap" */
- debug("%s: property '%s'\n", __func__, name);
- if (strncmp(name, prefix, plen) ||
- len < plen + 6 ||
- strcmp(name + len - 6, "keymap"))
- continue;
+ int proplen;
+ uchar *plain_keycode;
- len -= plen + 6;
- if (len == 0) {
- config->plain_keycode = create_keymap(config,
- (u32 *)prop->data, fdt32_to_cpu(prop->len),
- KEY_FN, &config->fn_pos);
- } else if (0 == strncmp(name + plen, "fn-", len)) {
- config->fn_keycode = create_keymap(config,
- (u32 *)prop->data, fdt32_to_cpu(prop->len),
- -1, NULL);
- } else {
- debug("%s: unrecognised property '%s'\n", __func__,
- name);
- }
+ prop = fdt_get_property(blob, node, "linux,keymap", &proplen);
+ /* Basic keymap is required */
+ if (!prop) {
+ debug("%s: cannot find keycode-plain map\n", __func__);
+ return -1;
}
- debug("%s: Decoded key maps %p, %p from fdt\n", __func__,
- config->plain_keycode, config->fn_keycode);
- if (!config->plain_keycode) {
- debug("%s: cannot find keycode-plain map\n", __func__);
+ plain_keycode = create_keymap(config, (u32 *)prop->data,
+ proplen, KEY_FN, &config->fn_pos);
+ config->plain_keycode = plain_keycode;
+ /* Conversion error -> fail */
+ if (!config->plain_keycode)
+ return -1;
+
+ prop = fdt_get_property(blob, node, "linux,fn-keymap", &proplen);
+ /* fn keymap is optional */
+ if (!prop)
+ goto done;
+
+ config->fn_keycode = create_keymap(config, (u32 *)prop->data,
+ proplen, -1, NULL);
+ /* Conversion error -> fail */
+ if (!config->fn_keycode) {
+ free(plain_keycode);
return -1;
}
+done:
+ debug("%s: Decoded key maps %p, %p from fdt\n", __func__,
+ config->plain_keycode, config->fn_keycode);
return 0;
}