KSZ8863 - SPI driver

[paveldedourek-eaton]

zephyr/drivers/ethernet/dsa_ksz8xxx.c

Line 60 in 1b99804

buf[0] = KSZ8XXX_SPI_CMD_WR | ((reg_addr >> 7) & 0x1F);

I would like to ask, why dsa_ksz8xxx_write_reg() / dsa_ksz8xxx_read_reg() functions does not respect protocol description from datasheet?

buf[0] = KSZ8XXX_SPI_CMD_WR | ((reg_addr >> 7) & 0x1F);
	buf[1] = (reg_addr << 1) & 0xFE;
	buf[2] = value;

should not be:

        buf[0] = KSZ8XXX_SPI_CMD_WR;
	buf[1] = (reg_addr ) & 0xFF;
	buf[2] = value;

and definition of SPI_CMD_RD = 0x03 / SPI_CMD_WR = 0x02.

Can somebody explain what is behind?

Thx