Understanding pads setup

Understanding pads setup

[Mauro Ziliani]

Hi all

I'm working on and mx51evk babbage board.

I have a lvds display connected ti disp1 pads.

I need to define DI1_DISP_CLK for pad J18 of the BGA (the chip is 19x19mm)


I know the pad definition is made by 5+1 values

<mux_reg conf_reg input_reg mux_mode input_val    CONFIG>


I don't find MX51_PAD_DI1_DISP_CLK__DI1_DISP_CLK or similar in 
imx51-pinfunc.h

I find MX51_PAD_DI2_DISP_CLK__DI2_DISP_CLK defined with this values.


#define MX51_PAD_DI2_DISP_CLK__DI2_DISP_CLK     0x34c 0x754 0x000 0x0 0x0


But I don't know how to use the 5 values.


Where I can find some example o detailed info about?


MZ

Re: Understanding pads setup

[Marco Cavallini]

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Hi Mauro,

you can refer to our IMX6 definitive GPIO guide ( https://wiki.koansoftware.com/index.php/IMX6_definitive_GPIO_guide ) related to iMX6 in our wiki
and adapt it to the required settings that you can see in the kernel documentation for imx53-pinctrl.txt ( https://github.com/Freescale/linux-fslc/blob/5.15-2.2.x-imx/Documentation/devicetree/bindings/pinctrl/fsl%2Cimx53-pinctrl.txt )

Ciao
--
Marco Cavallini | KOAN sas
Bergamo - Italia
embedded software engineering
https://KoanSoftware.com

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Re: [meta-freescale] Understanding pads setup

[Mauro Ziliani]

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Thank you.


Il 13/03/23 08:54, Marco Cavallini ha scritto:
> Hi Mauro,
>
> you can refer to our IMX6 definitive GPIO guide 
> <https://wiki.koansoftware.com/index.php/IMX6_definitive_GPIO_guide> 
> related to iMX6 in our wiki
> and adapt it to the required settings that you can see in the kernel 
> documentation for imx53-pinctrl.txt 
> <https://github.com/Freescale/linux-fslc/blob/5.15-2.2.x-imx/Documentation/devicetree/bindings/pinctrl/fsl%2Cimx53-pinctrl.txt>
>
> Ciao
> --
> Marco Cavallini | KOAN sas
> Bergamo - Italia
> embedded software engineering
> https://KoanSoftware.com
>
>
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Re: [meta-freescale] Understanding pads setup

[Fabio Estevam]

Hi Mauro,

On Sun, Mar 12, 2023 at 3:50 PM Mauro Ziliani <mauro@faresoftware.it> wrote:
>
> Hi all
>
> I'm working on and mx51evk babbage board.
>
> I have a lvds display connected ti disp1 pads.
>
> I need to define DI1_DISP_CLK for pad J18 of the BGA (the chip is 19x19mm)

Why? There is no mux option for the DI1_DISP_CLK pin.

Re: [meta-freescale] Understanding pads setup

[Mauro Ziliani]

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Hi Fabio.

In the schematic of the board, the pin J18 is connected to lvds 
transceiver as DI1_DISP_CLK.

I compared the size of the chip and I see there 2 versions: 13x13 mm 
where J18 is DI1_PIN2, while in the 19x19 J18 is DI1_DISP_CLK.




Il 14/03/23 01:39, Fabio Estevam ha scritto:
> Hi Mauro,
>
> On Sun, Mar 12, 2023 at 3:50 PM Mauro Ziliani<mauro@faresoftware.it>  wrote:
>> Hi all
>>
>> I'm working on and mx51evk babbage board.
>>
>> I have a lvds display connected ti disp1 pads.
>>
>> I need to define DI1_DISP_CLK for pad J18 of the BGA (the chip is 19x19mm)
> Why? There is no mux option for the DI1_DISP_CLK pin.
>
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Re: [meta-freescale] Understanding pads setup

[Fabio Estevam]

Hi Mauro,

On Tue, Mar 28, 2023 at 6:51 AM Mauro Ziliani <mauro@faresoftware.it> wrote:
>
> Hi Fabio.
>
> In the schematic of the board, the pin J18 is connected to lvds transceiver as DI1_DISP_CLK.

DI1_DISP_CLK is also used on the imx51-evk.

I don't understand why you want to include DI1_DISP_CLK into imx51-pinfunc.h.

The i.MX51 Reference Manual states that the DI1_DISP_CLK has no mux
option. It can only work as DI1_DISP_CLK functionality, so you don't
need to include it in imx51-pinfunc.h.