> i need to activate the /dev/i2c-2 on the beaglebone AI. When i got that
> right i have to add a node in the device tree in order to activate it.
> Can you tell me what i have to add there?
>
Don't know if this will help you, but to get access to the eeprom on my
cape I added:
&i2c4 {
eeprom: eeprom@54 {
compatible = "atmel,24c32";
reg = <0x54>;
};
};
to the .dts After that /sys/bus/i2c/devices/3-0054/eeprom appeared and I
could do e.g. "hexdump -C ...".
Be sure to set the iopads accordingly. I used this:
DRA7XX_CORE_IOPAD(0x3440, PIN_INPUT_PULLUP | MUX_MODE7) // R6 P9.19a
i2c4_scl
DRA7XX_CORE_IOPAD(0x357C, PULL_DIS | MUX_MODE15) // F4 P9.19b
DRA7XX_CORE_IOPAD(0x3444, PIN_INPUT_PULLUP | MUX_MODE7) // T9 P9.20a
i2c4_sda
DRA7XX_CORE_IOPAD(0x3578, PULL_DIS | MUX_MODE15) // D2 P9.20b
/opt/scripts/device/bone/show-pins.pl shows:
P9.19a 16 R6 7 fast rx up i2c4_scl kiwisdr
(cape_pins_kiwi)
P9.20a 17 T9 7 fast rx up i2c4_sda kiwisdr
(cape_pins_kiwi)
P9.20b 94 D2 f fast Driver off kiwisdr
(cape_pins_kiwi)
P9.19b 95 F4 f fast Driver off kiwisdr
(cape_pins_kiwi)
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