Access to i2c-gpio bus in /dev/ ?

lucviala — Tue, 30 Jan 2018 17:10:47 GMT

Hello nxp community,

I try to implement i2c-gpio on imx6ul via device-tree.

I already patch device-tree with the following lines and it compile nicely:

+#include <dt-bindings/gpio/gpio.h>

+/ {
+       i2c-device@0 {
+               compatible = "i2c-gpio";
+               sda-gpios = <&gpio1 9>;
+               scl-gpios = <&gpio1 1>;
+               i2c-gpio,sda-open-drain;
+               i2c-gpio,scl-open-drain;
+               i2c-gpio,delay-us = <120>;
+       };
+};

but i2c-gpio char device is missing in /dev/ folder when I boot up the target.

I also already compile kernel with i2c-gpio driver checked with menuconfig.

How I can access to i2c-gpio bus, or there is something missing in my devicetree patch ?

Thank you in advance for your advices.

Best Regards,

Luc

Re: Access to i2c-gpio bus in /dev/ ?

igorpadykov — Tue, 30 Jan 2018 23:10:13 GMT

Hi Luc

please look at i2c device-tree documentation:

I2C

i.MX6 Device Tree customization - Boundary Devices

Best regards
igor
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Access to i2c-gpio bus in /dev/ ?

Re: Access to i2c-gpio bus in /dev/ ?