Hi,
On 21/03/19 2:41 PM, Thomas Petazzoni wrote:
> Hello Kishon,
>
> On Thu, 21 Mar 2019 13:59:48 +0530
> Kishon Vijay Abraham I <kishon@xxxxxx> wrote:
>
>>> int ro = mmc_sd_get_ro(host);
>>>
>>> if (ro < 0) {
>>> pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n",
>>> mmc_hostname(host));
>>> } else if (ro > 0) {
>>> mmc_card_set_readonly(card);
>>> }
>>>
>>> Do you see this warning message before my change ?
>>
>> yes.
>
> Ah, OK. Then it makes sense.
>
>>> (3) WP signal routed to a dedicated signal of the SDHCI controller. In
>>> this case, the kernel needs to read the SDHCI_PRESENT_STATE
>>> register of the SDHCI controller.
>>
>> This is not supported in OMAP platforms.
>
> Because the SDHCI controller WP signal is not implemented / routed to
> an external pin ?
MMC_SDWP is brought out but I think it has never worked reliably for us that we
always relied on GPIO. It has been that way for multiple generation of SoCs. I
haven't experimented much on this myself.
Thanks
Kishon
