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Message-Id: <20221118063932.6418-9-srinivas.kandagatla@linaro.org>
Date: Fri, 18 Nov 2022 06:39:27 +0000
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To: gregkh@...uxfoundation.org
Cc: linux-kernel@...r.kernel.org,
Rafał Miłecki <rafal@...ecki.pl>,
Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH 08/13] nvmem: u-boot-env: add Broadcom format support
From: Rafał Miłecki <rafal@...ecki.pl>
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@...ecki.pl>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
drivers/nvmem/u-boot-env.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/nvmem/u-boot-env.c b/drivers/nvmem/u-boot-env.c
index 4fdbdccebda1..29b1d87a3c51 100644
--- 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_boot_env *priv)
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_env_of_match_table[] = {
{ .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, },
{},
};
--
2.25.1
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