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xilinx: common: Add support for DM_I2C zynq_board_read_rom_ethaddr()

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It is much easier to point to eeprom which stores information like MAC
address directly via DT. eeprom which contains this information is
pointed by /chosen/xlnx,eeprom parameter.

For example:
        chosen {
                bootargs = "earlycon";
                stdout-path = "serial0:115200n8";
+               xlnx,eeprom = &eeprom;
        };

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2019-01-21 16:29:07 +01:00
parent 9755e3db8b
commit 829e8c73dd
1 changed files with 32 additions and 0 deletions
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32
board/xilinx/common/board.c
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@ -8,6 +8,7 @@
#include <dm/uclass.h>
#include <i2c.h>
#if !defined(CONFIG_DM_I2C)
int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
{
#if defined(CONFIG_ZYNQ_GEM_EEPROM_ADDR) && \
@ -23,3 +24,34 @@ int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
return 0;
}
#else
int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
{
int ret = -EINVAL;
#if defined(CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET)
struct udevice *dev;
ofnode eeprom;
eeprom = ofnode_get_chosen_node("xlnx,eeprom");
if (!ofnode_valid(eeprom))
return -ENODEV;
debug("%s: Path to EEPROM %s\n", __func__,
ofnode_get_chosen_prop("xlnx,eeprom"));
ret = uclass_get_device_by_ofnode(UCLASS_I2C_EEPROM, eeprom, &dev);
if (ret)
return ret;
ret = dm_i2c_read(dev, CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET, ethaddr, 6);
if (ret)
debug("%s: I2C EEPROM MAC address read failed\n", __func__);
else
debug("%s: I2C EEPROM MAC %pM\n", __func__, ethaddr);
#endif
return ret;
}
#endif