[PATCH] board: atmel: common: introduce at91_set_eth1addr for second interface
Eugen Hristev
eugen.hristev at microchip.com
Wed Aug 5 14:30:34 CEST 2020
We already have a function to retrieve the mac address from one EEPROM.
For boards with a second Ethernet interface, however, we would
require another EEPROM with a second unique MAC address.
Introduce at91_set_eth1addr which will look for a second EEPROM
and set the 'eth1addr' variable with the obtained MAC address.
Signed-off-by: Eugen Hristev <eugen.hristev at microchip.com>
---
arch/arm/mach-at91/include/mach/at91_common.h | 1 +
board/atmel/common/mac_eeprom.c | 33 +++++++++++++++++++
2 files changed, 34 insertions(+)
diff --git a/arch/arm/mach-at91/include/mach/at91_common.h b/arch/arm/mach-at91/include/mach/at91_common.h
index 01e00c508a..f7b411cf7d 100644
--- a/arch/arm/mach-at91/include/mach/at91_common.h
+++ b/arch/arm/mach-at91/include/mach/at91_common.h
@@ -40,6 +40,7 @@ void configure_ddrcfg_input_buffers(bool open);
#endif
int at91_set_ethaddr(int offset);
+int at91_set_eth1addr(int offset);
void at91_spi_nor_set_ethaddr(void);
int at91_video_show_board_info(void);
diff --git a/board/atmel/common/mac_eeprom.c b/board/atmel/common/mac_eeprom.c
index 050aa51ee1..0f038beee6 100644
--- a/board/atmel/common/mac_eeprom.c
+++ b/board/atmel/common/mac_eeprom.c
@@ -35,3 +35,36 @@ int at91_set_ethaddr(int offset)
return 0;
}
+
+/* this function will set eth1addr from a second eeprom, if available */
+int at91_set_eth1addr(int offset)
+{
+ const int ETH_ADDR_LEN = 6;
+ unsigned char ethaddr[ETH_ADDR_LEN];
+ /* configure eth1addr for second interface */
+ const char *ETHADDR_NAME = "eth1addr";
+ struct udevice *dev;
+ int ret;
+
+ if (env_get(ETHADDR_NAME))
+ return 0;
+
+ /* first eeprom is retrieved, this is for the first interface */
+ ret = uclass_first_device_err(UCLASS_I2C_EEPROM, &dev);
+ if (ret)
+ return ret;
+
+ /* attempt to obtain a second eeprom device */
+ ret = uclass_next_device(&dev);
+ if (ret)
+ return ret;
+
+ ret = i2c_eeprom_read(dev, offset, ethaddr, 6);
+ if (ret)
+ return ret;
+
+ if (is_valid_ethaddr(ethaddr))
+ eth_env_set_enetaddr(ETHADDR_NAME, ethaddr);
+
+ return 0;
+}
--
2.25.1
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