The env variable "SN" is used to store the serial number on DH electronics SoMs. New SoMs will use the variable "dh_som_serial_number". To ensure compatibility, these env variables are synchronized. This is achieved using callback functions. To avoid recursive calls, these are locked against each other.
Signed-off-by: Christoph Niedermaier cniedermaier@dh-electronics.com --- Cc: "NXP i.MX U-Boot Team" uboot-imx@nxp.com Cc: Marek Vasut marex@denx.de Cc: Fabio Estevam festevam@gmail.com Cc: Stefano Babic sbabic@denx.de Cc: Tom Rini trini@konsulko.com Cc: u-boot@dh-electronics.com --- V3: - Add this patch to the series --- board/dhelectronics/common/dh_common.c | 26 ++++++++++++++++++++++++++ configs/imx8mp_dhsom.config | 1 + 2 files changed, 27 insertions(+)
diff --git a/board/dhelectronics/common/dh_common.c b/board/dhelectronics/common/dh_common.c index a7b0472a09..2e3e5c483b 100644 --- a/board/dhelectronics/common/dh_common.c +++ b/board/dhelectronics/common/dh_common.c @@ -45,6 +45,32 @@ struct eeprom_id_page { #define DH_EEPROM_ID_PAGE_V1_0_DATA_LEN (sizeof(struct eeprom_id_page) - \ offsetof(struct eeprom_id_page, mac0))
+static bool in_dh_som_serial_number; +static bool in_SN; + +static int on_dh_som_serial_number(const char *name, const char *value, enum env_op op, + int flags) +{ + in_dh_som_serial_number = true; + if (!in_SN) + env_set("SN", value); + in_dh_som_serial_number = false; + return 0; +} + +U_BOOT_ENV_CALLBACK(dh_som_serial_number, on_dh_som_serial_number); + +static int on_SN(const char *name, const char *value, enum env_op op, int flags) +{ + in_SN = true; + if (!in_dh_som_serial_number) + env_set("dh_som_serial_number", value); + in_SN = false; + return 0; +} + +U_BOOT_ENV_CALLBACK(SN, on_SN); + bool dh_mac_is_in_env(const char *env) { unsigned char enetaddr[6]; diff --git a/configs/imx8mp_dhsom.config b/configs/imx8mp_dhsom.config index 416143178c..87bf3bf65e 100644 --- a/configs/imx8mp_dhsom.config +++ b/configs/imx8mp_dhsom.config @@ -59,6 +59,7 @@ CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS=20 CONFIG_SYS_EEPROM_SIZE=16384 CONFIG_SYS_I2C_EEPROM_ADDR_LEN=2
+CONFIG_ENV_CALLBACK_LIST_STATIC="dh_som_serial_number:dh_som_serial_number,SN:SN," CONFIG_ENV_OFFSET=0xFE0000 CONFIG_ENV_OFFSET_REDUND=0xFF0000 CONFIG_ENV_SECT_SIZE=0x1000