Hi, On 02/07/2013 04:45, Fabio Estevam wrote: > Are you able to use the mxs i2c controller instead of bitbang if you > use this patch? > http://www.spinics.net/lists/stable/msg13202.html > Actually, it gets worse. I'm probably doing something wrong but I get: mxs-i2c 8005a000.i2c: Failed to get PIO reg. write descriptor. That is the one line 243. I'm open to any suggestion. BTW, I also tested PIO mode with and without touchscreen support as that seemed to toggle the issue on your side. It is also worse than what it was in 3.9. Trying to read the nau7802 ADC never returns. The excerpt from my DT: i2c1: i2c@8005a000 { pinctrl-names = "default"; pinctrl-0 = <&i2c1_pins_a>; status = "okay"; }; i2cmux { compatible = "i2c-mux-gpio"; #address-cells = <1>; #size-cells = <0>; pinctrl-names = "default"; pinctrl-0 = <&i2cmux_pins_cfa10049>; mux-gpios = <&gpio1 22 0 &gpio1 23 0>; i2c-parent = <&i2c1>; i2c@0 { reg = <0>; #address-cells = <1>; #size-cells = <0>; adc0: nau7802@2a { compatible = "nuvoton,nau7802"; reg = <0x2a>; nuvoton,vldo = <3000>; }; }; [...] -- Alexandre Belloni, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
