AM623: Software SDIO over GPIO using ti,am62-sdhci driver

Parvez Dekavadia

Part Number: AM623

Tool/software:

We want to interface silicon lab Si917x WiFi+BLE module with AM623 on our prototype board. Unfortunately, we haven't any mmc pin connected to it. So, I want to use GPIO pins as software SDIO pins over ti,am62-sdhci driver code. (CLK, CMD and DATA pin all are connected with GPIO on AM623 side)

What should be example device tree with some random GPIO for that?

Please check possibility and reply soon.

Part used: AM6232ATCGHAALW

Pin connected with wifi module

MCASP0_AXR2: A19: D1 (Wi-Fi Module)
MCASP0_AXR3: B19: D0 (Wi-Fi Module)
MCASP0_AFSR: E19: CMD (Wi-Fi Module)
MCASP0_ACLKR: A20: CLK (Wi-Fi Module)
GPMC0_WAIT1: V25: D2 (Wi-Fi Module)
GPMC0_WPN: K25: D3 (Wi-Fi Module)

3 months ago

0 Anshu Madwesh 3 months ago

TI__Mastermind 18380 points

Hello,

The WiFi device you mentioned isn't a TI Product so there is very limited support we can provide on the TI E2E forums.

Its recommended to use one of the MMC modules and their signals to interface with your device. Using GPIOs to do this isn't a use case that we've supported.

Thanks,

Anshu

0 Anshu Madwesh 3 months ago in reply to Anshu Madwesh

TI__Mastermind 18380 points

Hello,

I've re-assigned this thread to the MMC expert who has more insight on the linux driver. Please allow some time for a response.

Thanks,

Anshu

0 Prashant Shivhare 3 months ago in reply to Anshu Madwesh

TI__Guru 70501 points

Hi, the MMC controller driver does not support using GPIO pins to simulate the MMC interface.

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AM623: Software SDIO over GPIO using ti,am62-sdhci driver