diff options
Diffstat (limited to 'package/boot/uboot-envtools/patches/102-fw_env-add-fallback-to-Linux-s-NVMEM-based-access.patch')
-rw-r--r-- | package/boot/uboot-envtools/patches/102-fw_env-add-fallback-to-Linux-s-NVMEM-based-access.patch | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/package/boot/uboot-envtools/patches/102-fw_env-add-fallback-to-Linux-s-NVMEM-based-access.patch b/package/boot/uboot-envtools/patches/102-fw_env-add-fallback-to-Linux-s-NVMEM-based-access.patch deleted file mode 100644 index da17350b40..0000000000 --- a/package/boot/uboot-envtools/patches/102-fw_env-add-fallback-to-Linux-s-NVMEM-based-access.patch +++ /dev/null @@ -1,110 +0,0 @@ -From 8142c4554ffaa927529f24427a35f7ee2861793a Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> -Date: Thu, 16 Jun 2022 20:59:03 +0200 -Subject: [PATCH] fw_env: add fallback to Linux's NVMEM based access -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -A new DT binding for describing environment data block has been added in -Linux's commit 5db1c2dbc04c ("dt-bindings: nvmem: add U-Boot environment -variables binding"). Once we get a proper Linux NVMEM driver it'll be -possible to use Linux's binary interface for user-space as documented -in the: -https://www.kernel.org/doc/html/latest/driver-api/nvmem.html - -This commits makes fw_env fallback to looking for a compatible NVMEM -device in case config file isn't present. In a long term this may make -config files redundant and avoid code (info) duplication. - -Signed-off-by: Rafał Miłecki <rafal@milecki.pl> ---- - tools/env/fw_env.c | 70 ++++++++++++++++++++++++++++++++++++++++++++-- - 1 file changed, 67 insertions(+), 3 deletions(-) - ---- a/tools/env/fw_env.c -+++ b/tools/env/fw_env.c -@@ -1713,6 +1713,67 @@ static int check_device_config(int dev) - return rc; - } - -+static int find_nvmem_device(void) -+{ -+ const char *path = "/sys/bus/nvmem/devices"; -+ struct dirent *dent; -+ char *nvmem = NULL; -+ char comp[256]; -+ char buf[32]; -+ int bytes; -+ DIR *dir; -+ -+ dir = opendir(path); -+ if (!dir) { -+ return -EIO; -+ } -+ -+ while (!nvmem && (dent = readdir(dir))) { -+ FILE *fp; -+ -+ if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..")) { -+ continue; -+ } -+ -+ bytes = snprintf(comp, sizeof(comp), "%s/%s/of_node/compatible", path, dent->d_name); -+ if (bytes < 0 || bytes == sizeof(comp)) { -+ continue; -+ } -+ -+ fp = fopen(comp, "r"); -+ if (!fp) { -+ continue; -+ } -+ -+ fread(buf, sizeof(buf), 1, fp); -+ -+ if (!strcmp(buf, "u-boot,env")) { -+ bytes = asprintf(&nvmem, "%s/%s/nvmem", path, dent->d_name); -+ if (bytes < 0) { -+ nvmem = NULL; -+ } -+ } -+ -+ fclose(fp); -+ } -+ -+ closedir(dir); -+ -+ if (nvmem) { -+ struct stat s; -+ -+ stat(nvmem, &s); -+ -+ DEVNAME(0) = nvmem; -+ DEVOFFSET(0) = 0; -+ ENVSIZE(0) = s.st_size; -+ -+ return 0; -+ } -+ -+ return -ENOENT; -+} -+ - static int parse_config(struct env_opts *opts) - { - int rc; -@@ -1723,9 +1784,12 @@ static int parse_config(struct env_opts - #if defined(CONFIG_FILE) - /* Fills in DEVNAME(), ENVSIZE(), DEVESIZE(). Or don't. */ - if (get_config(opts->config_file)) { -- fprintf(stderr, "Cannot parse config file '%s': %m\n", -- opts->config_file); -- return -1; -+ if (find_nvmem_device()) { -+ fprintf(stderr, "Cannot parse config file '%s': %m\n", -+ opts->config_file); -+ fprintf(stderr, "Failed to find NVMEM device\n"); -+ return -1; -+ } - } - #else - DEVNAME(0) = DEVICE1_NAME; |