| From 5b4eaafbeac472fc19049152f18e88aecb2b2829 Mon Sep 17 00:00:00 2001 |
| From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> |
| Date: Mon, 17 Oct 2022 09:17:22 +0200 |
| Subject: [PATCH] nvmem: u-boot-env: add Broadcom format support |
| MIME-Version: 1.0 |
| Content-Type: text/plain; charset=UTF-8 |
| Content-Transfer-Encoding: 8bit |
| |
| Broadcom uses U-Boot for a lot of their bcmbca familiy chipsets. They |
| decided to store U-Boot environment data inside U-Boot partition and to |
| use a custom header (with "uEnv" magic and env data length). |
| |
| Add support for Broadcom's specific binding and their custom format. |
| |
| Ref: 6b0584c19d87 ("dt-bindings: nvmem: u-boot,env: add Broadcom's variant binding") |
| Signed-off-by: Rafał Miłecki <rafal@milecki.pl> |
| Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> |
| --- |
| drivers/nvmem/u-boot-env.c | 14 ++++++++++++++ |
| 1 file changed, 14 insertions(+) |
| |
| --- a/drivers/nvmem/u-boot-env.c |
| +++ b/drivers/nvmem/u-boot-env.c |
| @@ -16,6 +16,7 @@ |
| enum u_boot_env_format { |
| U_BOOT_FORMAT_SINGLE, |
| U_BOOT_FORMAT_REDUNDANT, |
| + U_BOOT_FORMAT_BROADCOM, |
| }; |
| |
| struct u_boot_env { |
| @@ -40,6 +41,13 @@ struct u_boot_env_image_redundant { |
| uint8_t data[]; |
| } __packed; |
| |
| +struct u_boot_env_image_broadcom { |
| + __le32 magic; |
| + __le32 len; |
| + __le32 crc32; |
| + uint8_t data[0]; |
| +} __packed; |
| + |
| static int u_boot_env_read(void *context, unsigned int offset, void *val, |
| size_t bytes) |
| { |
| @@ -138,6 +146,11 @@ static int u_boot_env_parse(struct u_boo |
| crc32_data_offset = offsetof(struct u_boot_env_image_redundant, data); |
| data_offset = offsetof(struct u_boot_env_image_redundant, data); |
| break; |
| + case U_BOOT_FORMAT_BROADCOM: |
| + crc32_offset = offsetof(struct u_boot_env_image_broadcom, crc32); |
| + crc32_data_offset = offsetof(struct u_boot_env_image_broadcom, data); |
| + data_offset = offsetof(struct u_boot_env_image_broadcom, data); |
| + break; |
| } |
| crc32 = le32_to_cpu(*(__le32 *)(buf + crc32_offset)); |
| crc32_data_len = priv->mtd->size - crc32_data_offset; |
| @@ -202,6 +215,7 @@ static const struct of_device_id u_boot_ |
| { .compatible = "u-boot,env", .data = (void *)U_BOOT_FORMAT_SINGLE, }, |
| { .compatible = "u-boot,env-redundant-bool", .data = (void *)U_BOOT_FORMAT_REDUNDANT, }, |
| { .compatible = "u-boot,env-redundant-count", .data = (void *)U_BOOT_FORMAT_REDUNDANT, }, |
| + { .compatible = "brcm,env", .data = (void *)U_BOOT_FORMAT_BROADCOM, }, |
| {}, |
| }; |
| |