AM6442: AM6442, I am trying to connect FRAM(FM22L16) to A53 with GPMC interface. Looking for device drivers.

Felix Oh

Prodigy 10 points

Part Number: AM6442
Other Parts Discussed in Thread: FM22L16

Hello,

Used SDK version: ti-processor-sdk-linux-rt-am64xx-evm-09.01.00.08

Used EVM: TMDS64GPEVM

We will make to use FRAM device in our HW through the GPMC interface.

I am trying to connect FRAM(FM22L16) to A53 with GPMC interface in Linux and u-boot, but I can't find FRAM solution or Device Drive in Ti technical site and forums.

The GPMC specitication is as below, so ii think that t is possible.

Integrated in MAIN domain: One instance of the General-Purpose Memory Controller (GPMC) module. The
GPMC is dedicated to interfacing with external memory devices and has the following main features:

• Support of 8- or 16-bit-wide data path to external memory devices

• Supports up to 4 independent chip-select regions of programmable size and programmable base addresses
on 16MB, 32MB, 64MB, or 128MB boundary in a total address space of 1GB

• Support of the following wide range of external memories/devices:
– Asynchronous or synchronous 8-bit wide memory or device (non-burst device)
– Asynchronous or synchronous 16-bit wide memory or device
– 16-bit non-multiplexed NOR flash device
– 16-bit address and data multiplexed NOR flash device
– 8-bit and 16-bit NAND flash device
– 16-bit pseudo-SRAM (pSRAM) device

I attached the datasheet of FM22L16 device, it is almost same SRAM.

Could you share the device driver of FRAM in Linux and u-boot?

Regards,

Felix

over 1 year ago

0 Felix Oh over 1 year ago

Prodigy 10 points

Infineon_FM22L16_4_MBIT__256K_X_16__F_RAM_DataShee-3361674.pdf

0 Bin Liu over 1 year ago in reply to Felix Oh

TI__Guru**** 169031 points

Hi Felix,

I didn't review the FM22L16 datasheet, but you would need to review it and the AM64x TRM GPMC chapter to translate the connection to the GPMC config. The following kernel device tree binding documents can be used as reference.

https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/Documentation/devicetree/bindings/memory-controllers/ti,gpmc.yaml?h=ti-linux-6.1.y

https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/Documentation/devicetree/bindings/memory-controllers/ti,gpmc-child.yaml?h=ti-linux-6.1.y

Here is the kernel device tree for a GPMC NAND card for reference.

https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/arch/arm64/boot/dts/ti/k3-am642-evm-nand.dtso?h=ti-linux-6.1.y

0 Felix Oh over 1 year ago in reply to Bin Liu

Prodigy 10 points

Hi Bin,

Thank you for your NAND guide, but it is different from FRAM device.

What I'm definitely asking for is the FM22L16 FRAM device driver, but I know it's difficult, so I want another FRAM Device Driver for reference to implementation.
Could you please review FM22L16 data sheet? After that, I would like you to provide me with more helpful data or source code.

I am looking for FRAM DeviceDriver not only Linux, but also U-boot.

I look forward to good guide.

Regards,

Felix

0 Bin Liu over 1 year ago in reply to Felix Oh

TI__Guru**** 169031 points

Hi Felix,

I understand GPMC NAND and GPMC SRAM configuration is different. The GPMC NAND device tree file is only for your reference to understand how the GPMC device tree binding is used. You would have to understand the interface of FM22L16 and AM64x GPMC and translate the integration parameters to device tree. We don't have any reference design of AM64x with any FRAM device, providing device driver for DM22L16 (or any non-TI devices in this context) is out of our support scope. However, if you have any specific questions related to AM64x GPMC interface, we are willing to answer the questions.

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AM6442: AM6442, I am trying to connect FRAM(FM22L16) to A53 with GPMC interface. Looking for device drivers.