[U-Boot] [PATCH v3 2/2] rockchip: tinker: set ethaddr in late init

[Jonas Karlman]

Set ethernet mac address in late init for Tinker Board,
prevents getting a random mac address each boot.

Read mac address from eeprom, first 6 bytes from m24c08 at 50.
Same as /etc/init.d/rockchip.sh on Tinker OS.

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---

Changes in v3:
- Use uclass_first_device_err() to find eeprom
- Use i2c_eeprom_read() to read eeprom

Changes in v2:
- Change to use i2c_eeprom device driver

 arch/arm/dts/rk3288-tinker.dts               |  7 +++++++
 board/rockchip/tinker_rk3288/tinker-rk3288.c | 28 ++++++++++++++++++++++++++++
 configs/tinker-rk3288_defconfig              |  3 +++
 3 files changed, 38 insertions(+)

diff --git a/arch/arm/dts/rk3288-tinker.dts b/arch/arm/dts/rk3288-tinker.dts
index 22881cb785..ea2f715922 100644
--- a/arch/arm/dts/rk3288-tinker.dts
+++ b/arch/arm/dts/rk3288-tinker.dts
@@ -67,3 +67,10 @@
 &gpio8 {
 	u-boot,dm-pre-reloc;
 };
+
+&i2c2 {
+    m24c08 at 50 {
+        compatible = "at,24c08", "i2c-eeprom";
+        reg = <0x50>;
+    };
+};
diff --git a/board/rockchip/tinker_rk3288/tinker-rk3288.c b/board/rockchip/tinker_rk3288/tinker-rk3288.c
index 79541a3939..c2872e7330 100644
--- a/board/rockchip/tinker_rk3288/tinker-rk3288.c
+++ b/board/rockchip/tinker_rk3288/tinker-rk3288.c
@@ -5,3 +5,31 @@
  */
 
 #include <common.h>
+#include <dm.h>
+#include <i2c_eeprom.h>
+#include <netdev.h>
+
+static int get_ethaddr_from_eeprom(u8 *addr)
+{
+	int ret;
+	struct udevice *dev;
+
+	ret = uclass_first_device_err(UCLASS_I2C_EEPROM, &dev);
+	if (ret)
+		return ret;
+
+	return i2c_eeprom_read(dev, 0, addr, 6);
+}
+
+int rk_board_late_init(void)
+{
+	u8 ethaddr[6];
+
+	if (get_ethaddr_from_eeprom(ethaddr))
+		return 0;
+
+	if (is_valid_ethaddr(ethaddr))
+		eth_setenv_enetaddr("ethaddr", ethaddr);
+
+	return 0;
+}
diff --git a/configs/tinker-rk3288_defconfig b/configs/tinker-rk3288_defconfig
index cec39384b3..dc3699d5c4 100644
--- a/configs/tinker-rk3288_defconfig
+++ b/configs/tinker-rk3288_defconfig
@@ -11,6 +11,7 @@ CONFIG_CONSOLE_MUX=y
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_SPL_STACK_R=y
 CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN=0x2000
+CONFIG_SPL_I2C_SUPPORT=y
 # CONFIG_CMD_IMLS is not set
 CONFIG_CMD_GPT=y
 CONFIG_CMD_MMC=y
@@ -39,6 +40,8 @@ CONFIG_CLK=y
 CONFIG_SPL_CLK=y
 CONFIG_ROCKCHIP_GPIO=y
 CONFIG_SYS_I2C_ROCKCHIP=y
+CONFIG_MISC=y
+CONFIG_I2C_EEPROM=y
 CONFIG_MMC_DW=y
 CONFIG_MMC_DW_ROCKCHIP=y
 CONFIG_DM_ETH=y
-- 
2.11.0