Linux/AM5728: EVM camera pinmux question

boycchi

Part Number: AM5728

Tool/software: Linux

Hi all,

the camera module used in AM5728 EVM is mt9t111,and now i want to change the pinmux of mt9t111 for our custom board.But i failed to find the right dts or dtsi file for modifying pinmux. Is that true to change mt9t111's pinmux in dts or dtsi files,or other file? The Processor SDK version i used is ti-processor-sdk-linux-am57xx-evm-03.03.00.04.

Sorry for my bad english!

Thanks in advance!

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

The software team have been notified. They will reply here.

0 Cvetolin Shulev-XID over 8 years ago

TI__Guru 65405 points

You can use the following pinmux configuration for mt9t111:

    mt9t11x@3C {
       compatible = "aptina,mt9t111";
       reg = <0x3C>;

       reset-gpios = <&gpio4 17 GPIO_ACTIVE_LOW>;
       oscen-gpios = <&gpio5 10 GPIO_ACTIVE_HIGH>;
       powerdown-gpios = <&gpio5 11 GPIO_ACTIVE_LOW>;
       bufen-gpios = <&gpio5 12 GPIO_ACTIVE_LOW>;
       camen-gpios = <&gpio6 11 GPIO_ACTIVE_LOW>;

       port {
           cam: endpoint {
               remote-endpoint = <&vin3a>;
               hsync-active = <1>;
               vsync-active = <0>;
               pclk-sample = <0>;
               input-clock-freq = <32000000>;
               pixel-clock-freq = <96000000>;
           };
       };
   };

You can find it in ../linux-<4.xxxxx>/arch/arm/boot/dts/am57xx-evm-common-cam-mt9t111.dtsi file. You can refer to this configuration and modify if necessary for your needs.

BR
Tsvetolin Shulev

0 boycchi over 8 years ago in reply to Cvetolin Shulev-XID

Expert 1005 points

Thanks for your reply,
but i want to know which pin is for hsync,vsync,pclk and 8bit yuv data,since our custom board use different pinmux for these signal,or maybe i should change my question to where to change the pinmux for vin3a?
BR
Boycchi

0 boycchi over 8 years ago in reply to Cvetolin Shulev-XID

Expert 1005 points

hi Tsvetolin Shulev,
I'm wondering if you can provide more insight for me on this!
BR
Boycchi

0 Kemal R. Shakir over 8 years ago in reply to boycchi

TI__Guru 55345 points

For hsync, vsync, pclk and 8bit yuv data check the <Processor SDK>/board-support/u-boot-<version>/board/ti/am57xx/mux_data.h file.

0 boycchi over 8 years ago in reply to Kemal R. Shakir

Expert 1005 points

Thanks and one more question.I don't understand the function of following five gpios:
reset-gpios = <&gpio4 17 GPIO_ACTIVE_LOW>;
oscen-gpios = <&gpio5 10 GPIO_ACTIVE_HIGH>;
powerdown-gpios = <&gpio5 11 GPIO_ACTIVE_LOW>;
bufen-gpios = <&gpio5 12 GPIO_ACTIVE_LOW>;
camen-gpios = <&gpio6 11 GPIO_ACTIVE_LOW>;
how should i change them according to my custom board or can u explain their function to me especially camen-gpios(does camen-gpios enable VIP datalines?i use different VIN3A IOSETs,EVM board use ioset1 while my custom board use ioset4,what should i change?).
BR,
Boycchi

0 Kemal R. Shakir over 8 years ago in reply to boycchi

TI__Guru 55345 points

Please, check the kernel documentation.
<Processor SDK>/board-support/ti-processor-sdk-linux-am57xx-evm-03.03.00.04/board-support/linux-<version>/Documentation/devicetree/bindings/media/i2c/mt9t11x.txt

Optional Properties:

- reset-gpios: Toggle when the module is enabled or disabled.
- powerdown-gpios: Toggle when the module is enabled or disabled.
- oscen-gpios: Enabled once at probe time.
- bufen-gpios: Enabled once at probe time.
- camen-gpios: Enabled once at probe time.

and refer to the AM572x evm bord's schematics to understand what they does.

reset-gpios is camera's RESET
oscen-gpios drives the MCLK
powerdown-gpios puts the sensor in STANDBY
bufen-gpios controls the camera module's 8-bit data line
camen-gpios is used to enable/disable vin3a data line

You can use the TI PinMux tool to find the IOSets for VIN3A.

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Linux/AM5728: EVM camera pinmux question