The pinmux input/output setting are only relevant when using GPIO. When using a
peripheral like McASP, the input/output are defined by the pin function. Also,
the serializers directions are defined by:
serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */
2 0 1 0
0 0 0 0
0 0 0 0
0 0 0 0
>;
Regards,
John
> On Apr 28, 2016, at 9:43 PM, evilwulfie <[email protected]> wrote:
>
> Not much help
> there is a file i have found BB-BONE-AUDI-03-00A0.dts
> that have other settings
>
> fragment@0 {
> target = <&am33xx_pinmux>;
> __overlay__ {
>
> bone_audio_cape_audio_pins: pinmux_bone_audio_cape_audio_pins {
> pinctrl-single,pins = <
> 0x1ac 0x20 /* mcasp0_ahclkx, INPUT | MODE0 */
> 0x19c 0x22 /* mcasp0_axr2, INPUT | MODE2 */
> 0x194 0x20 /* mcasp0_fsx, INPUT | MODE0 */
> 0x198 0x08 /* mcasp0_axr0, OUTPUT | MODE0 */
> 0x190 0x20 /* mcasp0_aclkx, INPUT | MODE0 */
> >;
> };
> };
> };
>
> seems closer but still backwards in my eye
>
>
> On 4/28/2016 9:39 PM, William Hermans wrote:
>> I really hate when gmail does that crap . . .
>>
>> pinctrl-single,pins = <
>> 0x190 (PIN_INPUT_PULLDOWN | MUX_MODE0) /*
>> mcasp0_aclkx.mcasp0_aclkx */
>> 0x194 (PIN_INPUT_PULLDOWN | MUX_MODE0) /*
>> mcasp0_fsx.mcasp0_fsx, INPUT */
>> 0x198 (PIN_INPUT_PULLDOWN | MUX_MODE0) /*
>> mcasp0_axr0.mcasp0_axr0 */
>> 0x19c (PIN_INPUT_PULLDOWN | MUX_MODE2) /*
>> mcasp0_ahclkr.mcasp0_axr2 */
>> 0x1ac (PIN_INPUT_PULLDOWN | MUX_MODE0) /*
>> MCASP0_AHCLKX -> MCASP0_AHCLKX (I2S_MCLK_OUT)- in */
>> >;
>>
>> On Thu, Apr 28, 2016 at 9:38 PM, William Hermans <[email protected]
>> <mailto:[email protected]>> wrote:
>> pinctrl-single,pins = <
>> 0x190 (PIN_INPUT_PULLDOWN | MUX_MODE0) /*
>> mcasp0_aclkx.mcasp0_aclkx */
>> 0x194 (PIN_INPUT_PULLDOWN | MUX_MODE0) /*
>> mcasp0_fsx.mcasp0_fsx, INPUT */
>> 0x198 (PIN_INPUT_PULLDOWN | MUX_MODE0) /*
>> mcasp0_axr0.mcasp0_axr0 */
>> 0x19c (PIN_INPUT_PULLDOWN | MUX_MODE2) /*
>> mcasp0_ahclkr.mcasp0_axr2 */
>> 0x1ac (PIN_INPUT_PULLDOWN | MUX_MODE0) /*
>> MCASP0_AHCLKX -> MCASP0_AHCLKX (I2S_MCLK_OUT)- in */
>> >;
>>
>> On Thu, Apr 28, 2016 at 9:24 PM, evilwulfie <
>> <mailto:[email protected]>[email protected]
>> <mailto:[email protected]>> wrote:
>> Ok I am slightly confused her on the pinmux signal directions.
>>
>> In the BB-BONE-AUDI-02-00A0.dts file we have all pins set to inputs
>>
>> fragment@0 {
>> target = <&am33xx_pinmux>;
>> __overlay__ {
>> bone_audio_cape_audio_pins: pinmux_bone_audio_cape_audio_pins {
>> pinctrl-single,pins = <
>> 0x190 (PIN_INPUT_PULLDOWN | MUX_MODE0) /*
>> mcasp0_aclkx.mcasp0_aclkx */
>> 0x194 (PIN_INPUT_PULLDOWN | MUX_MODE0) /*
>> mcasp0_fsx.mcasp0_fsx, INPUT */
>> 0x198 (PIN_INPUT_PULLDOWN | MUX_MODE0) /*
>> mcasp0_axr0.mcasp0_axr0 */
>> 0x19c (PIN_INPUT_PULLDOWN | MUX_MODE2) /*
>> mcasp0_ahclkr.mcasp0_axr2 */
>> 0x1ac (PIN_INPUT_PULLDOWN | MUX_MODE0) /*
>> MCASP0_AHCLKX -> MCASP0_AHCLKX (I2S_MCLK_OUT)- in */
>> >;
>> };
>> };
>> };
>>
>> Am i missing something here ? All pins should be outputs except the
>> audio input on axr0.mcasp0 which should be an input.
>>
>> On the UARTS the signal directions are correct.
>>
>> Is there some black magic that i am missing ?
>>
>>
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