Add support of opts erase for ubi env backend, this opts is used by command 'env erase'.
This command only zero-fill the env UBI volume CONFIG_ENV_UBI_VOLUME and CONFIG_ENV_UBI_VOLUME_REDUND, so the saved environment becomes invalid.
This patch introduces a local define ENV_UBI_VOLUME_REDUND only to avoid #if in the code, as CONFIG_ENV_UBI_VOLUME_REDUND is only defined when CONFIG_SYS_REDUNDAND_ENVIRONMENT is defined.
Signed-off-by: Patrick Delaunay patrick.delaunay@foss.st.com ---
env/ubi.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+)
diff --git a/env/ubi.c b/env/ubi.c index eb21c4f38b49..445d34fedb89 100644 --- a/env/ubi.c +++ b/env/ubi.c @@ -28,6 +28,12 @@
DECLARE_GLOBAL_DATA_PTR;
+#if CONFIG_SYS_REDUNDAND_ENVIRONMENT +#define ENV_UBI_VOLUME_REDUND CONFIG_ENV_UBI_VOLUME_REDUND +#else +#define ENV_UBI_VOLUME_REDUND "invalid" +#endif + #ifdef CONFIG_CMD_SAVEENV #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT static int env_ubi_save(void) @@ -177,9 +183,43 @@ static int env_ubi_load(void) } #endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */
+static int env_ubi_erase(void) +{ + ALLOC_CACHE_ALIGN_BUFFER(char, env_buf, CONFIG_ENV_SIZE); + int ret = 0; + + if (ubi_part(CONFIG_ENV_UBI_PART, UBI_VID_OFFSET)) { + printf("\n** Cannot find mtd partition "%s"\n", + CONFIG_ENV_UBI_PART); + return 1; + } + + memset(env_buf, 0x0, CONFIG_ENV_SIZE); + + if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME, + (void *)env_buf, CONFIG_ENV_SIZE)) { + printf("\n** Unable to erase env to %s:%s **\n", + CONFIG_ENV_UBI_PART, + CONFIG_ENV_UBI_VOLUME); + ret = 1; + } + if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT)) { + if (ubi_volume_write(ENV_UBI_VOLUME_REDUND, + (void *)env_buf, CONFIG_ENV_SIZE)) { + printf("\n** Unable to erase env to %s:%s **\n", + CONFIG_ENV_UBI_PART, + ENV_UBI_VOLUME_REDUND); + ret = 1; + } + } + + return ret; +} + U_BOOT_ENV_LOCATION(ubi) = { .location = ENVL_UBI, ENV_NAME("UBI") .load = env_ubi_load, .save = env_save_ptr(env_ubi_save), + .erase = ENV_ERASE_PTR(env_ubi_erase), };