[U-Boot] [U-Boot, v2, 3/4] board: sama5d2_xplained: Set 'ethaddr' got from AT24MAC

["Andreas Bießmann" <andreas@biessmann.org>]

On Tue, Sep 13, 2016 at 10:49:04AM +0800, Wenyou Yang wrote:
> If 'ethaddr' is not set, we will get the ethernet address from AT24MAC,
> and set it to 'ethaddr' variable.
> 
> Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> Signed-off-by: Songjun Wu <songjun.wu@microchip.com>

Reviewed-by: Andreas Bie?mann <andreas@biessmann.org>

> ---
> 
> Changes in v2: None
> 
>  board/atmel/sama5d2_xplained/sama5d2_xplained.c | 51 +++++++++++++++++++++++++
>  include/configs/sama5d2_xplained.h              |  6 +++
>  2 files changed, 57 insertions(+)
> 
> diff --git a/board/atmel/sama5d2_xplained/sama5d2_xplained.c b/board/atmel/sama5d2_xplained/sama5d2_xplained.c
> index 7ccadf2..c94574b 100644
> --- a/board/atmel/sama5d2_xplained/sama5d2_xplained.c
> +++ b/board/atmel/sama5d2_xplained/sama5d2_xplained.c
> @@ -7,6 +7,8 @@
>  
>  #include <common.h>
>  #include <atmel_hlcdc.h>
> +#include <dm.h>
> +#include <i2c.h>
>  #include <lcd.h>
>  #include <mmc.h>
>  #include <net.h>
> @@ -192,6 +194,55 @@ int board_eth_init(bd_t *bis)
>  	return rc;
>  }
>  
> +#ifdef CONFIG_CMD_I2C
> +static int set_ethaddr_from_eeprom(void)
> +{
> +	const int ETH_ADDR_LEN = 6;
> +	unsigned char ethaddr[ETH_ADDR_LEN];
> +	const char *ETHADDR_NAME = "ethaddr";
> +	struct udevice *bus, *dev;
> +
> +	if (getenv(ETHADDR_NAME))
> +		return 0;
> +
> +	if (uclass_get_device_by_seq(UCLASS_I2C, 1, &bus)) {
> +		printf("Cannot find I2C bus 1\n");
> +		return -1;
> +	}
> +
> +	if (dm_i2c_probe(bus, CONFIG_AT24MAC_ADDR, 0, &dev)) {
> +		printf("Failed to probe I2C chip\n");
> +		return -1;
> +	}
> +
> +	if (dm_i2c_read(dev, CONFIG_AT24MAC_REG, ethaddr, ETH_ADDR_LEN)) {
> +		printf("Failed to read ethernet address from EEPROM\n");
> +		return -1;
> +	}
> +
> +	if (!is_valid_ethaddr(ethaddr)) {
> +		printf("The ethernet address read from EEPROM is not valid!\n");
> +		return -1;
> +	}
> +
> +	return eth_setenv_enetaddr(ETHADDR_NAME, ethaddr);
> +}
> +#else
> +static int set_ethaddr_from_eeprom(void)
> +{
> +	return 0;
> +}
> +#endif
> +
> +#ifdef CONFIG_MISC_INIT_R
> +int misc_init_r(void)
> +{
> +	set_ethaddr_from_eeprom();
> +
> +	return 0;
> +}
> +#endif
> +
>  /* SPL */
>  #ifdef CONFIG_SPL_BUILD
>  void spl_board_init(void)
> diff --git a/include/configs/sama5d2_xplained.h b/include/configs/sama5d2_xplained.h
> index 77757a3..cada04f 100644
> --- a/include/configs/sama5d2_xplained.h
> +++ b/include/configs/sama5d2_xplained.h
> @@ -15,6 +15,8 @@
>  
>  #include "at91-sama5_common.h"
>  
> +#define CONFIG_MISC_INIT_R
> +
>  /* SDRAM */
>  #define CONFIG_NR_DRAM_BANKS		1
>  #define CONFIG_SYS_SDRAM_BASE           ATMEL_BASE_DDRCS
> @@ -54,6 +56,10 @@
>  #define CONFIG_DOS_PARTITION
>  #endif
>  
> +/* I2C */
> +#define CONFIG_AT24MAC_ADDR		0x5c
> +#define CONFIG_AT24MAC_REG		0x9a
> +
>  /* Ethernet Hardware */
>  #define CONFIG_MACB
>  #define CONFIG_RMII