U-Boot read an I2C register into an environment variable

gistfile1.txt

#### Demo Commands

mw.b ${loadaddr} 0 10
md.b ${loadaddr} 10
i2c bus 0
i2c read 0x51 0xDF.1 1 $loadaddr
md.b ${loadaddr} 10
setexpr.b recovery *$loadaddr
echo $recovery

#### Actual necessary commands: (is "i2c bus 0" necessary?)

i2c bus 0
i2c read 0x51 0xDF.1 1 $loadaddr
setexpr.b recovery *$loadaddr

#### Demo  (note: I previously set the I2C register to 0x13)

Ventana > mw.b ${loadaddr} 0 10
Ventana > md.b ${loadaddr} 10
12000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
Ventana > i2c bus 0
Bus 0:	mxc0
Ventana > i2c read 0x51 0xDF.1 1 $loadaddr
Ventana > md.b ${loadaddr} 10
12000000: 13 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
Ventana > setexpr.b recovery *$loadaddr
Ventana > echo $recovery
13