[PATCH v6 3/3] arm64: dts: rockchip: Add Radxa CM5 IO Board

[FUKAUMI Naoki]

On 11/6/25 08:38, FUKAUMI Naoki wrote:
> Hi Jimmy,
> 
> On 11/6/25 03:27, Jimmy Hon wrote:
>> On Tue, Nov 4, 2025 at 11:14 PM FUKAUMI Naoki <naoki at radxa.com> wrote:
>>>
>>> The Radxa CM5 IO Board is an application board for the Radxa CM5.
>>>
>>> Specification:
>>
>>> - 1x microSD card slot
>>
>> [ snip ]
>>
>>> +
>>> +&sdmmc {
>>> +       bus-width = <4>;
>>> +       cap-mmc-highspeed;
>>> +       cap-sd-highspeed;
>>> +       cd-gpios = <&gpio0 RK_PA4 GPIO_ACTIVE_LOW>;
>>> +       disable-wp;
>>> +       no-sdio;
>>> +       pinctrl-names = "default";
>>> +       pinctrl-0 = <&sdmmc_bus4 &sdmmc_clk &sdmmc_cmd>;
>>> +       sd-uhs-sdr104;
>>> +       vmmc-supply = <&vcc_3v3_s3>;
>>> +       vqmmc-supply = <&vccio_sd_s0>;
>>> +       status = "okay";
>>> +};
>>
>> When used as a TF slot, shouldn't there be a "no-mmc" also?
> 
> We have "eMMC to uSD."
>   https://radxa.com/products/accessories/emmc-to-usd
> 
> [  202.176757] mmc_host mmc1: Bus speed (slot 0) = 49500000Hz (slot req 
> 52000000Hz, actual 49500000HZ div = 0)
> [  202.178477] mmc1: new high speed MMC card at address 0001
> [  202.179534] mmcblk1: mmc1:0001 SLD64G 57.6 GiB
> [  202.207336] mmcblk1boot0: mmc1:0001 SLD64G 4.00 MiB
> [  202.210374] mmcblk1boot1: mmc1:0001 SLD64G 4.00 MiB
> [  202.212967] mmcblk1rpmb: mmc1:0001 SLD64G 4.00 MiB, chardev (511:1)
> 
> (I'm not sure why it says "Not work with the SD slot on the board." I 
> will check.)

There is no hardware limitation. "eMMC to uSD" should work with microSD 
card slot on the board.

That notice means "dts need to be changed".

Best regards,

--
FUKAUMI Naoki
Radxa Computer (Shenzhen) Co., Ltd.

>> That's how the Rock 5A, 5B, and 5C were defined.
> 
> I have submitted a patch without "no-mmc" before. I intend to send one 
> again when I have the chance.
> 
> Best regards,
> 
> -- 
> FUKAUMI Naoki
> Radxa Computer (Shenzhen) Co., Ltd.
> 
>> Jimmy
>>
> 
>